diff --git a/WebContent/WEB-INF/authserver-servlet.xml b/WebContent/WEB-INF/authserver-servlet.xml
index 4eb1843..1342774 100644
--- a/WebContent/WEB-INF/authserver-servlet.xml
+++ b/WebContent/WEB-INF/authserver-servlet.xml
@@ -21,6 +21,8 @@
 		base-package="com.eactive.eai.authserver" />
 	<context:component-scan
 		base-package="com.eactive.eai.adapter" />
+	<context:component-scan
+		base-package="com.eactive.eai.manage" />
 	<context:annotation-config />
 	<mvc:annotation-driven />
 	<mvc:default-servlet-handler />
diff --git a/WebContent/WEB-INF/web.xml b/WebContent/WEB-INF/web.xml
index e4e6473..0b2219d 100644
--- a/WebContent/WEB-INF/web.xml
+++ b/WebContent/WEB-INF/web.xml
@@ -34,20 +34,25 @@
     	<param-name>contextConfigLocation</param-name>
     	<param-value>/WEB-INF/applicationContext.xml</param-value>
     </context-param>
+
 	<!-- Weblogic 14.1.2 서블릿 설정 -->
- 	<servlet>
-		<servlet-name>default</servlet-name>
-		<servlet-class>weblogic.servlet.FileServlet</servlet-class>
-	</servlet>
-	<servlet-mapping>
-		<servlet-name>default</servlet-name>
-		<url-pattern>/static/*</url-pattern>
-	</servlet-mapping>
+<!--  	<servlet> -->
+<!-- 		<servlet-name>default</servlet-name> -->
+<!-- 		<servlet-class>weblogic.servlet.FileServlet</servlet-class> -->
+<!-- 	</servlet> -->
+<!-- 	<servlet-mapping> -->
+<!-- 		<servlet-name>default</servlet-name> -->
+<!-- 		<url-pattern>/static/*</url-pattern> -->
+<!-- 	</servlet-mapping> -->
 
     <!-- oAuth 2.0 인증서버 설정 -->
     <servlet>
 		<servlet-name>authserver</servlet-name>
 		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
+		<init-param>
+			<param-name>throwExceptionIfNoHandlerFound</param-name>
+			<param-value>true</param-value>
+		</init-param>
 		<load-on-startup>1</load-on-startup>
 	</servlet>
 	<servlet-mapping>
@@ -69,19 +74,18 @@
 	</filter-mapping>
 	
 	<!-- Dynamic REST API 어댑터 설정 -->
-<!-- 
-    <servlet>
-        <description/>
-        <servlet-name>RestApiDynamicInAdapter</servlet-name>
-        <servlet-class>com.eactive.eai.adapter.http.dynamic.RestApiAdapterMain</servlet-class>
-        <load-on-startup>2</load-on-startup>
-    </servlet>
-    <servlet-mapping>
-        <servlet-name>RestApiDynamicInAdapter</servlet-name>
-        <url-pattern>/API/*</url-pattern>
-        <url-pattern>/api/*</url-pattern>
-    </servlet-mapping>
--->
+<!--    <servlet>-->
+<!--        <description/>-->
+<!--        <servlet-name>RestApiDynamicInAdapter</servlet-name>-->
+<!--        <servlet-class>com.eactive.eai.adapter.http.dynamic.RestApiAdapterMain</servlet-class>-->
+<!--        <load-on-startup>2</load-on-startup>-->
+<!--    </servlet>-->
+<!--    <servlet-mapping>-->
+<!--        <servlet-name>RestApiDynamicInAdapter</servlet-name>-->
+<!--        <url-pattern>/API/*</url-pattern>-->
+<!--        <url-pattern>/api/*</url-pattern>-->
+<!--    </servlet-mapping>-->
+    
 <!--    
     <listener>
         <listener-class>com.eactive.eai.adapter.http.async.AppContextListener</listener-class>
diff --git a/WebContent/WEB-INF/weblogic-web.xml b/WebContent/WEB-INF/weblogic-web.xml
index ce3aafb..0491232 100644
--- a/WebContent/WEB-INF/weblogic-web.xml
+++ b/WebContent/WEB-INF/weblogic-web.xml
@@ -49,6 +49,10 @@
     <servlet>
 		<servlet-name>authserver</servlet-name>
 		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
+		<init-param>
+			<param-name>throwExceptionIfNoHandlerFound</param-name>
+			<param-value>true</param-value>
+		</init-param>
 		<load-on-startup>1</load-on-startup>
 	</servlet>
 	<servlet-mapping>
@@ -160,9 +164,45 @@
     <welcome-file-list>
         <welcome-file>index.jsp</welcome-file>
     </welcome-file-list>
+    <error-page>
+        <error-code>400</error-code>
+        <location>/error.jsp</location>
+    </error-page>
+    <error-page>
+        <error-code>401</error-code>
+        <location>/error.jsp</location>
+    </error-page>
+    <error-page>
+        <error-code>402</error-code>
+        <location>/error.jsp</location>
+    </error-page>
+    <error-page>
+        <error-code>403</error-code>
+        <location>/error.jsp</location>
+    </error-page>
+    <error-page>
+        <error-code>404</error-code>
+        <location>/error.jsp</location>
+    </error-page>
+    <error-page>
+        <error-code>405</error-code>
+        <location>/error.jsp</location>
+    </error-page>
     <error-page>
         <error-code>500</error-code>
         <location>/error.jsp</location>
     </error-page>
+    <error-page>
+        <error-code>501</error-code>
+        <location>/error.jsp</location>
+    </error-page>
+    <error-page>
+        <error-code>502</error-code>
+        <location>/error.jsp</location>
+    </error-page>
+    <error-page>
+        <error-code>503</error-code>
+        <location>/error.jsp</location>
+    </error-page>
 
 </web-app>
\ No newline at end of file
diff --git a/WebContent/error.jsp b/WebContent/error.jsp
index 20cdde1..1363dfc 100644
--- a/WebContent/error.jsp
+++ b/WebContent/error.jsp
@@ -1,5 +1,26 @@
+<%@page import="com.eactive.eai.common.util.MessageUtil"%>
 <%@ page import="java.io.*, java.util.*"%>
 <%@ page language="java" contentType="text/html;charset=utf-8" isErrorPage="true"%>
+<%
+Integer statusCode = (Integer) request.getAttribute("_authServerStatusCode");
+if (statusCode != null) {
+    response.setStatus(statusCode);
+}
+
+String code;
+if (statusCode != null && statusCode == 401) {
+    code = MessageUtil.ERROR_CODE_AUTH_FAIL;
+} else if (statusCode != null && statusCode == 404) {
+    code = MessageUtil.ERROR_CODE_SERVICE_NOT_FOUND;
+} else {
+    code = MessageUtil.ERROR_CODE_AP_ERROR;
+}
+
+String message = (String)request.getAttribute("errorMessage");
+String jsonErrorMessage = MessageUtil.makeJsonErrorMessage(code, message);
+out.println(jsonErrorMessage);
+%>
+<%--
 <html>
   <head>
     <title>Error</title>
@@ -16,3 +37,4 @@
   </body>
 </html>
 <% response.setStatus(200); %>
+ --%>
\ No newline at end of file
diff --git a/elink-online-common b/elink-online-common
index aacc1a3..5274ce8 160000
--- a/elink-online-common
+++ b/elink-online-common
@@ -1 +1 @@
-Subproject commit aacc1a389e145453cf92c18e9d7ffef568cf89e7
+Subproject commit 5274ce811d05e63936057a0bece1ca9cf620f0cc
diff --git a/kjb-docs/inflow/inflow_control_group_ddl.sql b/kjb-docs/inflow/inflow_control_group_ddl.sql
new file mode 100644
index 0000000..e258eb9
--- /dev/null
+++ b/kjb-docs/inflow/inflow_control_group_ddl.sql
@@ -0,0 +1,51 @@
+-- ============================================
+-- 유량제어 그룹 테이블 DDL
+-- ============================================
+
+-- ============================================
+-- Oracle
+-- ============================================
+
+-- 유량제어 그룹 테이블
+CREATE TABLE inflow_control_group (
+    group_id              VARCHAR2(36)   NOT NULL,  -- UUID
+    group_name            VARCHAR2(100),
+    threshold             NUMBER(10),
+    threshold_per_second  NUMBER(10),
+    threshold_time_unit   VARCHAR2(12),
+    use_yn                VARCHAR2(1)    DEFAULT '1',
+    modified_by           VARCHAR2(50),
+    modified_at           TIMESTAMP,
+    CONSTRAINT pk_inflow_control_group PRIMARY KEY (group_id)
+);
+
+COMMENT ON TABLE inflow_control_group IS '유량제어 그룹';
+COMMENT ON COLUMN inflow_control_group.group_id IS '그룹 ID (UUID)';
+COMMENT ON COLUMN inflow_control_group.group_name IS '그룹명';
+COMMENT ON COLUMN inflow_control_group.threshold IS '임계치';
+COMMENT ON COLUMN inflow_control_group.threshold_per_second IS '초당 임계치';
+COMMENT ON COLUMN inflow_control_group.threshold_time_unit IS '임계치 TimeUnit (SEC, MIN, HOU, DAY, MON)';
+COMMENT ON COLUMN inflow_control_group.use_yn IS '사용여부 (1:사용, 0:미사용)';
+COMMENT ON COLUMN inflow_control_group.modified_by IS '수정자';
+COMMENT ON COLUMN inflow_control_group.modified_at IS '수정일시';
+
+-- 그룹-인터페이스 매핑 테이블
+CREATE TABLE inflow_control_group_mapping (
+    interface_id          VARCHAR2(100)  NOT NULL,
+    group_id              VARCHAR2(36)   NOT NULL,
+    use_yn                VARCHAR2(1)    DEFAULT '1',
+    modified_by           VARCHAR2(50),
+    modified_at           TIMESTAMP,
+    CONSTRAINT pk_inflow_ctrl_grp_mapping PRIMARY KEY (interface_id)
+);
+
+COMMENT ON TABLE inflow_control_group_mapping IS '유량제어 그룹 매핑';
+COMMENT ON COLUMN inflow_control_group_mapping.interface_id IS '인터페이스 ID';
+COMMENT ON COLUMN inflow_control_group_mapping.group_id IS '그룹 ID';
+COMMENT ON COLUMN inflow_control_group_mapping.use_yn IS '사용여부 (1:사용, 0:미사용)';
+COMMENT ON COLUMN inflow_control_group_mapping.modified_by IS '수정자';
+COMMENT ON COLUMN inflow_control_group_mapping.modified_at IS '수정일시';
+
+-- 인덱스
+CREATE INDEX idx_inflow_ctrl_grp_map_grp ON inflow_control_group_mapping (group_id);
+
diff --git a/kjb-docs/inflow/그룹-유량제어-메뉴-추가-경로.md b/kjb-docs/inflow/그룹-유량제어-메뉴-추가-경로.md
new file mode 100644
index 0000000..c408040
--- /dev/null
+++ b/kjb-docs/inflow/그룹-유량제어-메뉴-추가-경로.md
@@ -0,0 +1,5 @@
+## 메뉴 추가 정보 
+
+* 경로 : 환경정보 > 유량제어 
+* 메뉴 명 : 그룹 별 유량제어
+* URL: /monitoring/onl/admin/inflow/inflowGroupControlMan.view
\ No newline at end of file
diff --git a/kjb-errors/.gitignore b/kjb-errors/.gitignore
new file mode 100644
index 0000000..08193f7
--- /dev/null
+++ b/kjb-errors/.gitignore
@@ -0,0 +1,32 @@
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store
diff --git a/kjb-errors/build.gradle b/kjb-errors/build.gradle
new file mode 100644
index 0000000..a987ef4
--- /dev/null
+++ b/kjb-errors/build.gradle
@@ -0,0 +1,29 @@
+plugins {
+    id 'java'
+}
+
+group = 'com.eactive.eai'
+version = '1.0.0'
+
+java {
+    sourceCompatibility = '17'
+}
+
+tasks.withType(JavaCompile) {
+    options.encoding = 'UTF-8'
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    implementation 'com.fasterxml.jackson.core:jackson-databind:2.15.2'
+    implementation 'org.apache.httpcomponents.client5:httpclient5:5.2.1'
+
+    testImplementation 'org.junit.jupiter:junit-jupiter:5.10.0'
+}
+
+tasks.named('test') {
+    useJUnitPlatform()
+}
diff --git a/kjb-errors/gradle/wrapper/gradle-wrapper.jar b/kjb-errors/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..41d9927
Binary files /dev/null and b/kjb-errors/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/kjb-errors/gradle/wrapper/gradle-wrapper.properties b/kjb-errors/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..54228ea
--- /dev/null
+++ b/kjb-errors/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,6 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.7-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+networkTimeout=10000
diff --git a/kjb-errors/gradlew b/kjb-errors/gradlew
new file mode 100644
index 0000000..1b6c787
--- /dev/null
+++ b/kjb-errors/gradlew
@@ -0,0 +1,234 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+APP_NAME="Gradle"
+APP_BASE_NAME=${0##*/}
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"
diff --git a/kjb-errors/gradlew.bat b/kjb-errors/gradlew.bat
new file mode 100644
index 0000000..107acd3
--- /dev/null
+++ b/kjb-errors/gradlew.bat
@@ -0,0 +1,89 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/kjb-errors/settings.gradle b/kjb-errors/settings.gradle
new file mode 100644
index 0000000..045fcf4
--- /dev/null
+++ b/kjb-errors/settings.gradle
@@ -0,0 +1 @@
+rootProject.name = 'kjb-errors'
diff --git a/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/BearerTokenErrorTest.java b/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/BearerTokenErrorTest.java
new file mode 100644
index 0000000..7edd2f9
--- /dev/null
+++ b/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/BearerTokenErrorTest.java
@@ -0,0 +1,168 @@
+package com.eactive.eai.kjb.errors;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.apache.hc.client5.http.classic.methods.HttpPost;
+import org.apache.hc.client5.http.entity.UrlEncodedFormEntity;
+import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
+import org.apache.hc.client5.http.impl.classic.HttpClients;
+import org.apache.hc.core5.http.NameValuePair;
+import org.apache.hc.core5.http.io.entity.EntityUtils;
+import org.apache.hc.core5.http.message.BasicNameValuePair;
+import org.junit.jupiter.api.Test;
+
+import java.util.ArrayList;
+import java.util.List;
+
+class BearerTokenErrorTest {
+
+	@Test
+	void testCase001_잘못된GrantType() throws Exception {
+		// given
+		String url = TestConfig.getBaseUrl("/auth/oauth/v2/token");
+
+		List<NameValuePair> params = new ArrayList<>();
+		params.add(new BasicNameValuePair("grant_type", "password"));
+		params.add(new BasicNameValuePair("client_id", "AyeWx0OpYLJbHpZ21DDSxYfQPmD5Ckn8"));
+		params.add(new BasicNameValuePair("client_secret", "KwBYJT1m1v3SUvzN2HPHhy2Ad9Q2GADbgWkYZZg9Ybbc8R1uEuBJNQ9oVl13b1qiXwYvDWTaX0EanxY4SMjNfnBBsZzfNoMwwDPTb3IjQy5k3CRxTAYzcSnmzlC4FSsG"));
+		params.add(new BasicNameValuePair("scope", "api"));
+
+		// when
+		try (CloseableHttpClient httpClient = HttpClients.createDefault()) {
+			HttpPost httpPost = new HttpPost(url);
+			httpPost.setEntity(new UrlEncodedFormEntity(params));
+
+			String responseBody = httpClient.execute(httpPost, response -> {
+				String body = EntityUtils.toString(response.getEntity());
+				System.out.println("Response Body: " + body);
+
+				// then
+				assertEquals(401, response.getCode());
+				return body;
+			});
+
+			// MessageUtil.makeJsonErrorMessage 기본 포맷 검증
+			ErrorResponseValidator.validateErrorFormat(responseBody);
+		}
+	}
+
+	@Test
+	void testCase002_존재하지않는ClientId() throws Exception {
+		// given
+		String url = TestConfig.getBaseUrl("/auth/oauth/v2/token");
+
+		List<NameValuePair> params = new ArrayList<>();
+		params.add(new BasicNameValuePair("grant_type", "client_credentials"));
+		params.add(new BasicNameValuePair("client_id", "INVALID_CLIENT_ID"));
+		params.add(new BasicNameValuePair("client_secret", "invalid_secret"));
+		params.add(new BasicNameValuePair("scope", "api"));
+
+		// when
+		try (CloseableHttpClient httpClient = HttpClients.createDefault()) {
+			HttpPost httpPost = new HttpPost(url);
+			httpPost.setEntity(new UrlEncodedFormEntity(params));
+
+			String responseBody = httpClient.execute(httpPost, response -> {
+				String body = EntityUtils.toString(response.getEntity());
+				System.out.println("Response Body: " + body);
+
+				// then
+				assertEquals(401, response.getCode());
+				return body;
+			});
+
+			// MessageUtil.makeJsonErrorMessage 기본 포맷 검증
+			ErrorResponseValidator.validateErrorFormat(responseBody);
+		}
+	}
+
+	@Test
+	void testCase003_잘못된ClientSecret() throws Exception {
+		// given
+		String url = TestConfig.getBaseUrl("/auth/oauth/v2/token");
+
+		List<NameValuePair> params = new ArrayList<>();
+		params.add(new BasicNameValuePair("grant_type", "client_credentials"));
+		params.add(new BasicNameValuePair("client_id", "AyeWx0OpYLJbHpZ21DDSxYfQPmD5Ckn8"));
+		params.add(new BasicNameValuePair("client_secret", "WRONG_SECRET"));
+		params.add(new BasicNameValuePair("scope", "api"));
+
+		// when
+		try (CloseableHttpClient httpClient = HttpClients.createDefault()) {
+			HttpPost httpPost = new HttpPost(url);
+			httpPost.setEntity(new UrlEncodedFormEntity(params));
+
+			String responseBody = httpClient.execute(httpPost, response -> {
+				String body = EntityUtils.toString(response.getEntity());
+				System.out.println("Response Body: " + body);
+
+				// then
+				assertEquals(401, response.getCode());
+				return body;
+			});
+
+			// MessageUtil.makeJsonErrorMessage 기본 포맷 검증
+			ErrorResponseValidator.validateErrorFormat(responseBody);
+		}
+	}
+
+	@Test
+	void testCase004_Scope없음() throws Exception {
+		// given
+		String url = TestConfig.getBaseUrl("/auth/oauth/v2/token");
+
+		List<NameValuePair> params = new ArrayList<>();
+		params.add(new BasicNameValuePair("grant_type", "client_credentials"));
+		params.add(new BasicNameValuePair("client_id", "AyeWx0OpYLJbHpZ21DDSxYfQPmD5Ckn8"));
+		params.add(new BasicNameValuePair("client_secret", "KwBYJT1m1v3SUvzN2HPHhy2Ad9Q2GADbgWkYZZg9Ybbc8R1uEuBJNQ9oVl13b1qiXwYvDWTaX0EanxY4SMjNfnBBsZzfNoMwwDPTb3IjQy5k3CRxTAYzcSnmzlC4FSsG"));
+		params.add(new BasicNameValuePair("scope", ""));
+
+		// when
+		try (CloseableHttpClient httpClient = HttpClients.createDefault()) {
+			HttpPost httpPost = new HttpPost(url);
+			httpPost.setEntity(new UrlEncodedFormEntity(params));
+
+			String responseBody = httpClient.execute(httpPost, response -> {
+				String body = EntityUtils.toString(response.getEntity());
+				System.out.println("Response Body: " + body);
+
+				// then
+				assertEquals(401, response.getCode());
+				return body;
+			});
+
+			// MessageUtil.makeJsonErrorMessage 기본 포맷 검증
+			ErrorResponseValidator.validateErrorFormat(responseBody);
+		}
+	}
+
+	@Test
+	void testCase005_허용되지않은Scope() throws Exception {
+		// given
+		String url = TestConfig.getBaseUrl("/auth/oauth/v2/token");
+
+		List<NameValuePair> params = new ArrayList<>();
+		params.add(new BasicNameValuePair("grant_type", "client_credentials"));
+		params.add(new BasicNameValuePair("client_id", "AyeWx0OpYLJbHpZ21DDSxYfQPmD5Ckn8"));
+		params.add(new BasicNameValuePair("client_secret", "KwBYJT1m1v3SUvzN2HPHhy2Ad9Q2GADbgWkYZZg9Ybbc8R1uEuBJNQ9oVl13b1qiXwYvDWTaX0EanxY4SMjNfnBBsZzfNoMwwDPTb3IjQy5k3CRxTAYzcSnmzlC4FSsG"));
+		params.add(new BasicNameValuePair("scope", "invalid_scope"));
+
+		// when
+		try (CloseableHttpClient httpClient = HttpClients.createDefault()) {
+			HttpPost httpPost = new HttpPost(url);
+			httpPost.setEntity(new UrlEncodedFormEntity(params));
+
+			String responseBody = httpClient.execute(httpPost, response -> {
+				String body = EntityUtils.toString(response.getEntity());
+				System.out.println("Response Body: " + body);
+
+				// then
+				assertEquals(401, response.getCode());
+				return body;
+			});
+
+			// MessageUtil.makeJsonErrorMessage 기본 포맷 검증
+			ErrorResponseValidator.validateErrorFormat(responseBody);
+		}
+	}
+}
diff --git a/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/BearerTokenFilterErrorTest.java b/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/BearerTokenFilterErrorTest.java
new file mode 100644
index 0000000..d2db920
--- /dev/null
+++ b/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/BearerTokenFilterErrorTest.java
@@ -0,0 +1,41 @@
+package com.eactive.eai.kjb.errors;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.apache.hc.client5.http.classic.methods.HttpPost;
+import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
+import org.apache.hc.client5.http.impl.classic.HttpClients;
+import org.apache.hc.core5.http.ContentType;
+import org.apache.hc.core5.http.io.entity.EntityUtils;
+import org.apache.hc.core5.http.io.entity.StringEntity;
+import org.junit.jupiter.api.Test;
+
+class BearerTokenFilterErrorTest {
+
+	@Test
+	void testCase001_잘못된Bearer토큰_401에러() throws Exception {
+		// given
+		String url = TestConfig.getBaseUrl("/api/auth/case009?transactionId=1234567890");
+		String invalidToken = "INVALID_TOKEN_12345";
+
+		// when
+		try (CloseableHttpClient httpClient = HttpClients.createDefault()) {
+			HttpPost httpPost = new HttpPost(url);
+			httpPost.setHeader("Authorization", "Bearer " + invalidToken);
+			httpPost.setHeader("Content-Type", "application/json");
+			httpPost.setEntity(new StringEntity("{}", ContentType.APPLICATION_JSON));
+
+			String responseBody = httpClient.execute(httpPost, response -> {
+				String body = EntityUtils.toString(response.getEntity());
+				System.out.println("Response Body: " + body);
+
+				// then
+				assertEquals(401, response.getCode());
+				return body;
+			});
+
+			// MessageUtil.makeJsonErrorMessage 기본 포맷 검증
+			ErrorResponseValidator.validateErrorFormat(responseBody);
+		}
+	}
+}
diff --git a/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/BearerTokenSuccessTest.java b/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/BearerTokenSuccessTest.java
new file mode 100644
index 0000000..7911a91
--- /dev/null
+++ b/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/BearerTokenSuccessTest.java
@@ -0,0 +1,67 @@
+package com.eactive.eai.kjb.errors;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+import org.apache.hc.client5.http.classic.methods.HttpPost;
+import org.apache.hc.client5.http.entity.UrlEncodedFormEntity;
+import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
+import org.apache.hc.client5.http.impl.classic.HttpClients;
+import org.apache.hc.core5.http.NameValuePair;
+import org.apache.hc.core5.http.io.entity.EntityUtils;
+import org.apache.hc.core5.http.message.BasicNameValuePair;
+import org.junit.jupiter.api.Test;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import java.util.ArrayList;
+import java.util.List;
+
+class BearerTokenSuccessTest {
+
+	private final ObjectMapper objectMapper = new ObjectMapper();
+
+	@Test
+	void testCase001_BearerToken발급성공() throws Exception {
+		// given
+		String url = TestConfig.getBaseUrl("/auth/oauth/v2/token");
+
+		List<NameValuePair> params = new ArrayList<>();
+		params.add(new BasicNameValuePair("grant_type", "client_credentials"));
+		params.add(new BasicNameValuePair("client_id", "AyeWx0OpYLJbHpZ21DDSxYfQPmD5Ckn8"));
+		params.add(new BasicNameValuePair("client_secret", "KwBYJT1m1v3SUvzN2HPHhy2Ad9Q2GADbgWkYZZg9Ybbc8R1uEuBJNQ9oVl13b1qiXwYvDWTaX0EanxY4SMjNfnBBsZzfNoMwwDPTb3IjQy5k3CRxTAYzcSnmzlC4FSsG"));
+		params.add(new BasicNameValuePair("scope", "api"));
+
+		// when
+		try (CloseableHttpClient httpClient = HttpClients.createDefault()) {
+			HttpPost httpPost = new HttpPost(url);
+			httpPost.setEntity(new UrlEncodedFormEntity(params));
+
+			String responseBody = httpClient.execute(httpPost, response -> {
+				String body = EntityUtils.toString(response.getEntity());
+				System.out.println("Response Body: " + body);
+
+				// then
+				assertEquals(200, response.getCode());
+				return body;
+			});
+
+			// 응답 검증
+			JsonNode jsonNode = objectMapper.readTree(responseBody);
+			assertNotNull(jsonNode, "JSON 응답이 null입니다");
+
+			// Bearer Token 응답 필드 확인
+			assertNotNull(jsonNode.get("access_token"), "access_token 필드가 없습니다");
+			assertNotNull(jsonNode.get("token_type"), "token_type 필드가 없습니다");
+			assertNotNull(jsonNode.get("expires_in"), "expires_in 필드가 없습니다");
+			assertNotNull(jsonNode.get("scope"), "scope 필드가 없습니다");
+
+			assertEquals("Bearer", jsonNode.get("token_type").asText());
+
+			String prettyJson = objectMapper.writerWithDefaultPrettyPrinter().writeValueAsString(jsonNode);
+			System.out.println("Bearer Token Response:");
+			System.out.println(prettyJson);
+		}
+	}
+}
diff --git a/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/EAPIM_ErrorResponse_WorkHistory.md b/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/EAPIM_ErrorResponse_WorkHistory.md
new file mode 100644
index 0000000..0a31f5f
--- /dev/null
+++ b/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/EAPIM_ErrorResponse_WorkHistory.md
@@ -0,0 +1,218 @@
+# EAPIM 에러 응답 포맷 통일 작업 히스토리
+
+## 작업 배경
+
+### 목표
+모든 HTTP 에러 응답을 다음과 같은 표준 JSON 포맷으로 통일:
+```json
+{"error":{"code":"에러코드","message":"에러메시지"}}
+```
+
+## 변경 내역
+
+### 1. MessageUtil 에러 포맷 정의
+**파일**: `elink-online-common/src/main/java/com/eactive/eai/common/util/MessageUtil.java`
+
+- 표준 에러 응답 포맷 정의
+  ```java
+  public static final String ERROR_MESSAGE_DEFAULT_FORMAT = "{\"error\":{\"code\":\"%s\",\"message\":\"%s\"}}";
+  ```
+
+- 에러 코드 상수 추가
+  ```java
+  public static final String ERROR_CODE_AP_ERROR = "E.GW.AP_ERROR";
+  public static final String ERROR_CODE_AUTH_FAIL = "E.GW.AUTH_FAIL";
+  public static final String ERROR_CODE_SERVICE_NOT_FOUND = "E.GW.SERVICE_NOT_FOUND";
+  ```
+
+- 에러 메시지 생성 메서드
+  ```java
+  public static String makeJsonErrorMessage(String code, String msg)
+  public static String makeJsonErrorMessage(String code, String msg, String errorFormat)
+  ```
+
+### 2. 전역 ExceptionHandler 추가
+**파일**: `src/main/java/com/eactive/eai/authserver/config/WebMvcConfig.java` (신규 생성)
+
+Spring MVC 전역 예외 처리를 위한 `@ControllerAdvice` 클래스 추가
+
+**처리하는 예외**:
+- `HttpMessageNotReadableException` - HTTP 메시지 파싱 실패
+- `MethodArgumentNotValidException` - 유효성 검증 실패
+- `MissingServletRequestParameterException` - 필수 파라미터 누락
+- `BindException` - 바인딩 에러
+- `NoHandlerFoundException` - 404 Not Found (핸들러 없음)
+- `AuthenticationException` - 401 Unauthorized (인증 실패)
+- `AccessDeniedException` - 403 Forbidden (권한 없음)
+- `Exception` - 500 Internal Server Error (기타 예외)
+
+**동작 방식**:
+1. 예외 발생 시 적절한 HTTP 상태 코드 설정
+2. request에 `_authServerStatusCode`, `errorMessage` 속성 설정
+3. `/error.jsp`로 forward하여 표준 JSON 응답 생성
+
+### 3. error.jsp 수정
+**파일**: `WebContent/error.jsp`
+
+**변경 사항**:
+- 기존 HTML 에러 페이지를 JSON 응답으로 변경
+- `MessageUtil.makeJsonErrorMessage()` 호출하여 표준 포맷 응답 생성
+- HTTP 상태 코드에 따른 에러 코드 매핑:
+  - 401 → `ERROR_CODE_AUTH_FAIL`
+  - 404 → `ERROR_CODE_SERVICE_NOT_FOUND`
+  - 기타 → `ERROR_CODE_AP_ERROR`
+
+```jsp
+Integer statusCode = (Integer) request.getAttribute("_authServerStatusCode");
+if (statusCode != null) {
+    response.setStatus(statusCode);
+}
+
+String code;
+if (statusCode != null && statusCode == 401) {
+    code = MessageUtil.ERROR_CODE_AUTH_FAIL;
+} else if (statusCode != null && statusCode == 404) {
+    code = MessageUtil.ERROR_CODE_SERVICE_NOT_FOUND;
+} else {
+    code = MessageUtil.ERROR_CODE_AP_ERROR;
+}
+
+String message = (String)request.getAttribute("errorMessage");
+String jsonErrorMessage = MessageUtil.makeJsonErrorMessage(code, message);
+out.println(jsonErrorMessage);
+```
+
+### 4. WebSecurityConfig 에러 처리 추가
+**파일**: `src/main/java/com/eactive/eai/authserver/config/WebSecurityConfig.java`
+
+**변경 사항**:
+- Spring Security 레벨의 인증/권한 에러 처리 추가
+- `authenticationEntryPoint`: 401 Unauthorized → error.jsp 포워딩
+- `accessDeniedHandler`: 403 Forbidden → error.jsp 포워딩
+- `/error.jsp` 접근 허용 설정 추가
+
+### 5. web.xml 설정 추가
+**파일**: `WebContent/WEB-INF/web.xml`
+
+**변경 사항**:
+- DispatcherServlet에 `throwExceptionIfNoHandlerFound=true` 설정 추가
+  ```xml
+  <init-param>
+      <param-name>throwExceptionIfNoHandlerFound</param-name>
+      <param-value>true</param-value>
+  </init-param>
+  ```
+  → 핸들러 없을 시 `NoHandlerFoundException` 발생하도록 설정
+
+- error-page 매핑 (400, 401, 403, 404, 500 등)
+  ```xml
+  <error-page>
+      <error-code>404</error-code>
+      <location>/error.jsp</location>
+  </error-page>
+  ```
+  → Servlet 레벨에서 발생한 에러도 error.jsp로 라우팅
+
+### 6. KjbMGOAuth2Controller 에러 처리 적용
+**파일**: `src/main/java/com/eactive/eai/authserver/custom/KjbMGOAuth2Controller.java`
+
+**변경 사항**:
+- `JwtAuthException`, 일반 예외 처리 시 `MessageUtil.makeJsonErrorMessage()` 사용
+- HTTP 400/401 에러를 표준 포맷으로 반환
+
+### 7. BearerTokenContoller 에러 처리 적용
+**파일**: `src/main/java/com/eactive/eai/authserver/custom/BearerTokenContoller.java`
+
+**변경 사항**:
+- `MessageUtil` import 추가
+- 기존 OAuth2 RFC 6749 에러 포맷을 MessageUtil 표준 포맷으로 변경
+- `JwtAuthException`: HTTP 401 + `ERROR_CODE_AUTH_FAIL`
+- 일반 예외: HTTP 500 + `ERROR_CODE_AP_ERROR`
+
+### 8. BearerTokenFilter 에러 처리 적용
+**파일**: `src/main/java/com/eactive/eai/authserver/custom/BearerTokenFilter.java`
+
+**변경 사항**:
+- `MessageUtil` import 추가
+- 필터에서 발생하는 에러 응답을 MessageUtil 표준 포맷으로 변경
+- `JwtAuthException`: HTTP 401 + `ERROR_CODE_AUTH_FAIL`
+- 일반 예외: HTTP 500 + `ERROR_CODE_AP_ERROR`
+- JSONObject 직접 생성 방식 제거
+
+### 9. ApiAdapterController 에러 처리 적용
+**파일**: `src/main/java/com/eactive/eai/adapter/controller/ApiAdapterController.java`
+
+**변경 사항**:
+- Adapter URI를 찾을 수 없는 경우: `ERROR_CODE_SERVICE_NOT_FOUND`
+- Adapter를 찾을 수 없는 경우: `ERROR_CODE_AP_ERROR`
+
+## 적용 범위
+
+### 처리되는 에러 시나리오
+
+1. **OAuth2 토큰 발급 실패** (`/mapi/oauth2/token`)
+   - 필수 파라미터 누락, 잘못된 grant_type, 인증 실패 등
+   - HTTP 400/401 + 표준 JSON 에러 응답
+
+2. **CA Bearer 토큰 발급 실패** (`/auth/oauth/v2/token`)
+   - 잘못된 grant_type, 존재하지 않는 client_id, 잘못된 client_secret, scope 오류 등
+   - HTTP 401/500 + 표준 JSON 에러 응답
+
+3. **Bearer 토큰 인증 실패** (`/api/auth/*`)
+   - 토큰 만료, 잘못된 토큰 등
+   - HTTP 401 + 표준 JSON 에러 응답
+
+4. **404 Not Found**
+   - 존재하지 않는 API 엔드포인트 호출
+   - HTTP 404 + 표준 JSON 에러 응답
+
+5. **400 Bad Request**
+   - 잘못된 JSON 포맷, 필수 파라미터 누락 등
+   - HTTP 400 + 표준 JSON 에러 응답
+
+6. **403 Forbidden**
+   - 권한 없는 리소스 접근
+   - HTTP 403 + 표준 JSON 에러 응답
+
+7. **500 Internal Server Error**
+   - 서버 내부 오류
+   - HTTP 500 + 표준 JSON 에러 응답
+
+## 테스트
+
+테스트 코드는 별도 모듈(`kjb-errors`)에 작성됨.
+
+**테스트 문서**: `kjb-errors/src/test/java/com/eactive/eai/kjb/errors/EAPIM_ExceptionHandler_Test.md`
+
+**주요 테스트**:
+- `OAuth2TokenSuccessTest` - OAuth2 토큰 발급 성공
+- `OAuth2BearerAuthTest` - Bearer 토큰 인증 성공
+- `OAuth2BearerAuth404ErrorTest` - Bearer 토큰 인증 후 404 에러
+- `ExceptionHandler400ErrorTest` - 400 에러 응답 검증
+- `ExceptionHandler404ErrorTest` - 404 에러 응답 검증
+- `ExceptionHandlerSuccessTest` - 일반 API 정상 응답
+- `BearerTokenSuccessTest` - CA Bearer 토큰 발급 성공
+- `BearerTokenErrorTest` - CA Bearer 토큰 발급 에러 (5가지 케이스)
+- `BearerTokenFilterErrorTest` - Bearer 토큰 필터 인증 실패
+
+**검증 항목**:
+- HTTP 상태 코드 정확성
+- 응답 포맷이 `{"error":{"code":"...","message":"..."}}` 형식인지 확인
+- 에러 코드가 적절히 매핑되는지 확인
+
+## 에러 코드 매핑
+
+| HTTP Status | Error Code | 설명 |
+|-------------|-----------|------|
+| 400 | E.GW.AP_ERROR | Bad Request (잘못된 요청) |
+| 401 | E.GW.AUTH_FAIL | Unauthorized (인증 실패) |
+| 403 | E.GW.AP_ERROR | Forbidden (권한 없음) |
+| 404 | E.GW.SERVICE_NOT_FOUND | Not Found (서비스 없음) |
+| 500 | E.GW.AP_ERROR | Internal Server Error (서버 오류) |
+
+## 참고 사항
+
+### 주의사항
+- `MessageUtil.makeJsonErrorMessage()`는 메시지 내의 특수문자를 JSON escape 처리함
+- error.jsp는 JSON 응답만 출력하므로 브라우저에서 HTML로 보이지 않음
+- 상태 코드는 실제 HTTP 응답 상태 코드와 일치해야 함
diff --git a/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/EAPIM_ExceptionHandler_Test.md b/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/EAPIM_ExceptionHandler_Test.md
new file mode 100644
index 0000000..d0e7546
--- /dev/null
+++ b/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/EAPIM_ExceptionHandler_Test.md
@@ -0,0 +1,99 @@
+# EAPIM ExceptionHandler 테스트
+
+## 개요
+에러 응답이 `MessageUtil.makeJsonErrorMessage()` 포맷으로 통일되는지 검증
+
+**에러 응답 포맷**:
+```json
+{"error":{"code":"에러코드","message":"에러메시지"}}
+```
+
+## 테스트 케이스
+
+### OAuth2 토큰 발급 성공 (OAuth2TokenSuccessTest)
+- **URL**: `http://127.0.0.1:30110/oauth/token`
+- **Content-Type**: `application/x-www-form-urlencoded`
+- **파라미터**: grant_type, client_id, client_secret, scope
+- **테스트 대상**: AuthorizationServerConfig 표준 OAuth2 토큰 발급
+- **검증**: HTTP 200, access_token, token_type, expires_in
+
+### Bearer 토큰 인증 성공 (OAuth2BearerAuthTest)
+- **Step 1**: 토큰 발급 (`/oauth/token`)
+- **Step 2**: Bearer 토큰으로 API 호출 (POST)
+- **URL**: `http://127.0.0.1:30110/api/auth/case009?transactionId=1234567890`
+- **Authorization**: `Bearer {access_token}`
+- **요청**: `{}`
+- **테스트 대상**: Bearer 토큰 인증 API
+- **검증**: HTTP 200, 정상 응답
+
+### Bearer 토큰 인증 404 에러 (OAuth2BearerAuth404ErrorTest)
+- **Step 1**: 토큰 발급 (`/oauth/token`)
+- **Step 2**: 존재하지 않는 API 호출 (POST)
+- **URL**: `http://127.0.0.1:30110/api/auth/caseXXX`
+- **Authorization**: `Bearer {access_token}`
+- **요청**: `{}`
+- **테스트 대상**: WebMvcConfig @ExceptionHandler(NoHandlerFoundException)
+- **검증**: HTTP 404, MessageUtil 포맷
+
+### 400 에러 (ExceptionHandler400ErrorTest)
+- **URL**: `http://127.0.0.1:30110/mapi/oauth2/token`
+- **요청**: `{}`
+- **테스트 대상**: KjbMGOAuth2Controller JwtAuthException 처리
+- **검증**: HTTP 400, MessageUtil 포맷
+
+### 404 에러 (ExceptionHandler404ErrorTest)
+- **URL**: `http://127.0.0.1:30110/oauth/token/v2`
+- **요청**: `{}`
+- **테스트 대상**: WebMvcConfig @ExceptionHandler(NoHandlerFoundException)
+- **검증**: HTTP 404, MessageUtil 포맷
+
+### 일반 API 정상 응답 (ExceptionHandlerSuccessTest)
+- **URL**: `http://localhost:30110/api/test/case001`
+- **요청**: `{"serviceId": "TST10001", "aaa": "aaaa", "bbb": "bbbb"}`
+- **테스트 대상**: 일반 컨트롤러 정상 응답
+- **검증**: HTTP 200, transactionId, status="approved"
+
+### Bearer 토큰 발급 성공 (BearerTokenSuccessTest)
+- **URL**: `http://127.0.0.1:30110/auth/oauth/v2/token`
+- **Content-Type**: `application/x-www-form-urlencoded`
+- **파라미터**: grant_type, client_id, client_secret, scope
+- **테스트 대상**: BearerTokenContoller CA Bearer Token 발급
+- **검증**: HTTP 200, access_token, token_type="Bearer", expires_in, scope
+
+### Bearer 토큰 발급 에러 (BearerTokenErrorTest)
+#### testCase001_잘못된GrantType
+- **URL**: `http://127.0.0.1:30110/auth/oauth/v2/token`
+- **grant_type**: `password` (잘못된 값)
+- **테스트 대상**: BearerTokenContoller JwtAuthException 처리
+- **검증**: HTTP 401, MessageUtil 포맷
+
+#### testCase002_존재하지않는ClientId
+- **URL**: `http://127.0.0.1:30110/auth/oauth/v2/token`
+- **client_id**: `INVALID_CLIENT_ID`
+- **테스트 대상**: BearerTokenContoller JwtAuthException 처리
+- **검증**: HTTP 401, MessageUtil 포맷
+
+#### testCase003_잘못된ClientSecret
+- **URL**: `http://127.0.0.1:30110/auth/oauth/v2/token`
+- **client_secret**: `WRONG_SECRET`
+- **테스트 대상**: BearerTokenContoller JwtAuthException 처리
+- **검증**: HTTP 401, MessageUtil 포맷
+
+#### testCase004_Scope없음
+- **URL**: `http://127.0.0.1:30110/auth/oauth/v2/token`
+- **scope**: `` (빈 값)
+- **테스트 대상**: BearerTokenContoller JwtAuthException 처리
+- **검증**: HTTP 401, MessageUtil 포맷
+
+#### testCase005_허용되지않은Scope
+- **URL**: `http://127.0.0.1:30110/auth/oauth/v2/token`
+- **scope**: `invalid_scope`
+- **테스트 대상**: BearerTokenContoller JwtAuthException 처리
+- **검증**: HTTP 401, MessageUtil 포맷
+
+### Bearer 토큰 필터 에러 (BearerTokenFilterErrorTest)
+- **URL**: `http://127.0.0.1:30110/api/auth/case009?transactionId=1234567890`
+- **Authorization**: `Bearer INVALID_TOKEN_12345`
+- **요청**: `{}`
+- **테스트 대상**: BearerTokenFilter JwtAuthException 처리
+- **검증**: HTTP 401, MessageUtil 포맷
diff --git a/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/ErrorResponseValidator.java b/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/ErrorResponseValidator.java
new file mode 100644
index 0000000..e249dbe
--- /dev/null
+++ b/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/ErrorResponseValidator.java
@@ -0,0 +1,42 @@
+package com.eactive.eai.kjb.errors;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+/**
+ * MessageUtil.makeJsonErrorMessage 기본 포맷 검증 유틸리티
+ * 기본 포맷: { "error" : {"code":"%s","message":"%s"} }
+ */
+public class ErrorResponseValidator {
+
+	private static final ObjectMapper objectMapper = new ObjectMapper();
+
+	/**
+	 * MessageUtil.makeJsonErrorMessage 포맷 검증
+	 * @param responseBody JSON 응답 문자열
+	 * @throws Exception JSON 파싱 실패 시
+	 */
+	public static void validateErrorFormat(String responseBody) throws Exception {
+		JsonNode jsonNode = objectMapper.readTree(responseBody);
+		assertNotNull(jsonNode, "JSON 응답이 null입니다");
+
+		assertTrue(jsonNode.has("error"), "error 필드가 존재해야 합니다");
+
+		JsonNode errorNode = jsonNode.get("error");
+		assertNotNull(errorNode, "error 객체가 null입니다");
+
+		assertTrue(errorNode.has("code"), "error.code 필드가 존재해야 합니다");
+		assertTrue(errorNode.has("message"), "error.message 필드가 존재해야 합니다");
+
+		assertNotNull(errorNode.get("code").asText(), "error.code 값이 null입니다");
+		assertNotNull(errorNode.get("message").asText(), "error.message 값이 null입니다");
+
+		// 검증 성공 시 Pretty Print
+		String prettyJson = objectMapper.writerWithDefaultPrettyPrinter().writeValueAsString(jsonNode);
+		System.out.println("Validated Error Format:");
+		System.out.println(prettyJson);
+	}
+}
diff --git a/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/ExceptionHandler400ErrorTest.java b/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/ExceptionHandler400ErrorTest.java
new file mode 100644
index 0000000..bdbc547
--- /dev/null
+++ b/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/ExceptionHandler400ErrorTest.java
@@ -0,0 +1,44 @@
+package com.eactive.eai.kjb.errors;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.apache.hc.client5.http.classic.methods.HttpPost;
+import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
+import org.apache.hc.client5.http.impl.classic.HttpClients;
+import org.apache.hc.core5.http.ContentType;
+import org.apache.hc.core5.http.io.entity.EntityUtils;
+import org.apache.hc.core5.http.io.entity.StringEntity;
+import org.junit.jupiter.api.Test;
+
+class ExceptionHandler400ErrorTest {
+
+	@Test
+	void testCase001_400에러() throws Exception {
+		// given
+		String url = TestConfig.getBaseUrl("/mapi/oauth2/token");
+
+		String requestBody = """
+				{}
+				""";
+
+		// when
+		try (CloseableHttpClient httpClient = HttpClients.createDefault()) {
+			HttpPost httpPost = new HttpPost(url);
+			httpPost.setHeader("Content-Type", "application/json");
+			httpPost.setHeader("Accept", "application/json");
+			httpPost.setEntity(new StringEntity(requestBody, ContentType.APPLICATION_JSON));
+
+			String responseBody = httpClient.execute(httpPost, response -> {
+				String body = EntityUtils.toString(response.getEntity());
+				System.out.println("Response Body: " + body);
+
+				// then
+				assertEquals(400, response.getCode());
+				return body;
+			});
+
+			// MessageUtil.makeJsonErrorMessage 기본 포맷 검증
+			ErrorResponseValidator.validateErrorFormat(responseBody);
+		}
+	}
+}
diff --git a/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/ExceptionHandler404ErrorTest.java b/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/ExceptionHandler404ErrorTest.java
new file mode 100644
index 0000000..a7e6532
--- /dev/null
+++ b/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/ExceptionHandler404ErrorTest.java
@@ -0,0 +1,44 @@
+package com.eactive.eai.kjb.errors;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.apache.hc.client5.http.classic.methods.HttpPost;
+import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
+import org.apache.hc.client5.http.impl.classic.HttpClients;
+import org.apache.hc.core5.http.ContentType;
+import org.apache.hc.core5.http.io.entity.EntityUtils;
+import org.apache.hc.core5.http.io.entity.StringEntity;
+import org.junit.jupiter.api.Test;
+
+class ExceptionHandler404ErrorTest {
+
+	@Test
+	void testCase001_404에러() throws Exception {
+		// given
+		String url = TestConfig.getBaseUrl("/oauth/token/v2");
+
+		String requestBody = """
+				{}
+				""";
+
+		// when
+		try (CloseableHttpClient httpClient = HttpClients.createDefault()) {
+			HttpPost httpPost = new HttpPost(url);
+			httpPost.setHeader("Content-Type", "application/json");
+			httpPost.setHeader("Accept", "application/json");
+			httpPost.setEntity(new StringEntity(requestBody, ContentType.APPLICATION_JSON));
+
+			String responseBody = httpClient.execute(httpPost, response -> {
+				String body = EntityUtils.toString(response.getEntity());
+				System.out.println("Response Body: " + body);
+
+				// then
+				assertEquals(404, response.getCode());
+				return body;
+			});
+
+			// MessageUtil.makeJsonErrorMessage 기본 포맷 검증
+			ErrorResponseValidator.validateErrorFormat(responseBody);
+		}
+	}
+}
diff --git a/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/ExceptionHandlerSuccessTest.java b/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/ExceptionHandlerSuccessTest.java
new file mode 100644
index 0000000..a2f86d5
--- /dev/null
+++ b/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/ExceptionHandlerSuccessTest.java
@@ -0,0 +1,60 @@
+package com.eactive.eai.kjb.errors;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+import org.apache.hc.client5.http.classic.methods.HttpPost;
+import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
+import org.apache.hc.client5.http.impl.classic.HttpClients;
+import org.apache.hc.core5.http.ContentType;
+import org.apache.hc.core5.http.HttpEntity;
+import org.apache.hc.core5.http.io.entity.EntityUtils;
+import org.apache.hc.core5.http.io.entity.StringEntity;
+import org.junit.jupiter.api.Test;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+class ExceptionHandlerSuccessTest {
+
+	private final ObjectMapper objectMapper = new ObjectMapper();
+
+	@Test
+	void testCase001_정상호출() throws Exception {
+		// given
+		String url = TestConfig.getBaseUrl("/api/test/case001");
+
+		String requestBody = """
+				{
+				  "serviceId": "TST10001",
+				  "aaa": "aaaa",
+				  "bbb": "bbbb"
+				}
+				""";
+
+		// when
+		try (CloseableHttpClient httpClient = HttpClients.createDefault()) {
+			HttpPost httpPost = new HttpPost(url);
+			httpPost.setHeader("Content-Type", "application/json");
+			httpPost.setHeader("Accept", "application/json");
+			httpPost.setEntity(new StringEntity(requestBody, ContentType.APPLICATION_JSON));
+
+			String responseBody = httpClient.execute(httpPost, response -> {
+				assertEquals(200, response.getCode());
+				return EntityUtils.toString(response.getEntity());
+			});
+
+			// then
+			assertNotNull(responseBody);
+
+			JsonNode jsonNode = objectMapper.readTree(responseBody);
+			assertNotNull(jsonNode);
+
+			// validate
+			assertNotNull(jsonNode.get("transactionId"));
+			assertEquals("approved", jsonNode.get("status").asText());
+			String prettyJson = objectMapper.writerWithDefaultPrettyPrinter().writeValueAsString(jsonNode);
+			System.out.println(prettyJson);
+		}
+	}
+}
diff --git a/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/OAuth2BearerAuth404ErrorTest.java b/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/OAuth2BearerAuth404ErrorTest.java
new file mode 100644
index 0000000..c368fe1
--- /dev/null
+++ b/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/OAuth2BearerAuth404ErrorTest.java
@@ -0,0 +1,78 @@
+package com.eactive.eai.kjb.errors;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+import org.apache.hc.client5.http.classic.methods.HttpPost;
+import org.apache.hc.client5.http.entity.UrlEncodedFormEntity;
+import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
+import org.apache.hc.client5.http.impl.classic.HttpClients;
+import org.apache.hc.core5.http.ContentType;
+import org.apache.hc.core5.http.NameValuePair;
+import org.apache.hc.core5.http.io.entity.EntityUtils;
+import org.apache.hc.core5.http.io.entity.StringEntity;
+import org.apache.hc.core5.http.message.BasicNameValuePair;
+import org.junit.jupiter.api.Test;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import java.util.ArrayList;
+import java.util.List;
+
+class OAuth2BearerAuth404ErrorTest {
+
+	private final ObjectMapper objectMapper = new ObjectMapper();
+
+	@Test
+	void testCase001_Bearer인증_존재하지않는API_404에러() throws Exception {
+		// Step 1: 토큰 발급
+		String tokenUrl = TestConfig.getBaseUrl("/oauth2/token");
+		String accessToken;
+
+		try (CloseableHttpClient httpClient = HttpClients.createDefault()) {
+			HttpPost tokenPost = new HttpPost(tokenUrl);
+
+			List<NameValuePair> params = new ArrayList<>();
+			params.add(new BasicNameValuePair("grant_type", "client_credentials"));
+			params.add(new BasicNameValuePair("client_id", "AyeWx0OpYLJbHpZ21DDSxYfQPmD5Ckn8"));
+			params.add(new BasicNameValuePair("client_secret", "KwBYJT1m1v3SUvzN2HPHhy2Ad9Q2GADbgWkYZZg9Ybbc8R1uEuBJNQ9oVl13b1qiXwYvDWTaX0EanxY4SMjNfnBBsZzfNoMwwDPTb3IjQy5k3CRxTAYzcSnmzlC4FSsG"));
+			params.add(new BasicNameValuePair("scope", "api"));
+
+			tokenPost.setEntity(new UrlEncodedFormEntity(params));
+
+			String tokenResponse = httpClient.execute(tokenPost, response -> {
+				assertEquals(200, response.getCode(), "토큰 발급 실패");
+				return EntityUtils.toString(response.getEntity());
+			});
+
+			JsonNode tokenJson = objectMapper.readTree(tokenResponse);
+			accessToken = tokenJson.get("access_token").asText();
+			assertNotNull(accessToken, "access_token이 null입니다");
+
+			System.out.println("Access Token: " + accessToken);
+		}
+
+		// Step 2: 존재하지 않는 API 호출 (404 에러 예상)
+		String apiUrl = TestConfig.getBaseUrl("/api/auth/caseXXX");
+
+		try (CloseableHttpClient httpClient = HttpClients.createDefault()) {
+			HttpPost httpPost = new HttpPost(apiUrl);
+			httpPost.setHeader("Authorization", "Bearer " + accessToken);
+			httpPost.setHeader("Content-Type", "application/json");
+			httpPost.setEntity(new StringEntity("{}", ContentType.APPLICATION_JSON));
+
+			String responseBody = httpClient.execute(httpPost, response -> {
+				String body = EntityUtils.toString(response.getEntity());
+				System.out.println("Response Body: " + body);
+
+				// then
+				assertEquals(404, response.getCode(), "404 에러가 발생해야 합니다");
+				return body;
+			});
+
+			// MessageUtil.makeJsonErrorMessage 기본 포맷 검증
+			ErrorResponseValidator.validateErrorFormat(responseBody);
+		}
+	}
+}
diff --git a/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/OAuth2BearerAuthTest.java b/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/OAuth2BearerAuthTest.java
new file mode 100644
index 0000000..064e02b
--- /dev/null
+++ b/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/OAuth2BearerAuthTest.java
@@ -0,0 +1,83 @@
+package com.eactive.eai.kjb.errors;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+import org.apache.hc.client5.http.classic.methods.HttpPost;
+import org.apache.hc.client5.http.entity.UrlEncodedFormEntity;
+import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
+import org.apache.hc.client5.http.impl.classic.HttpClients;
+import org.apache.hc.core5.http.ContentType;
+import org.apache.hc.core5.http.NameValuePair;
+import org.apache.hc.core5.http.io.entity.EntityUtils;
+import org.apache.hc.core5.http.io.entity.StringEntity;
+import org.apache.hc.core5.http.message.BasicNameValuePair;
+import org.junit.jupiter.api.Test;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import java.util.ArrayList;
+import java.util.List;
+
+class OAuth2BearerAuthTest {
+
+	private final ObjectMapper objectMapper = new ObjectMapper();
+
+	@Test
+	void testCase001_Bearer인증_성공() throws Exception {
+		// Step 1: 토큰 발급
+		String tokenUrl = TestConfig.getBaseUrl("/oauth2/token");
+		String accessToken;
+
+		try (CloseableHttpClient httpClient = HttpClients.createDefault()) {
+			HttpPost tokenPost = new HttpPost(tokenUrl);
+
+			List<NameValuePair> params = new ArrayList<>();
+			params.add(new BasicNameValuePair("grant_type", "client_credentials"));
+			params.add(new BasicNameValuePair("client_id", "AyeWx0OpYLJbHpZ21DDSxYfQPmD5Ckn8"));
+			params.add(new BasicNameValuePair("client_secret", "KwBYJT1m1v3SUvzN2HPHhy2Ad9Q2GADbgWkYZZg9Ybbc8R1uEuBJNQ9oVl13b1qiXwYvDWTaX0EanxY4SMjNfnBBsZzfNoMwwDPTb3IjQy5k3CRxTAYzcSnmzlC4FSsG"));
+			params.add(new BasicNameValuePair("scope", "api"));
+
+			tokenPost.setEntity(new UrlEncodedFormEntity(params));
+
+			String tokenResponse = httpClient.execute(tokenPost, response -> {
+				assertEquals(200, response.getCode(), "토큰 발급 실패");
+				return EntityUtils.toString(response.getEntity());
+			});
+
+			JsonNode tokenJson = objectMapper.readTree(tokenResponse);
+			accessToken = tokenJson.get("access_token").asText();
+			assertNotNull(accessToken, "access_token이 null입니다");
+
+			System.out.println("Access Token: " + accessToken);
+		}
+
+		// Step 2: Bearer 토큰으로 인증 API 호출
+		String apiUrl = TestConfig.getBaseUrl("/api/auth/case009?transactionId=1234567890");
+
+		try (CloseableHttpClient httpClient = HttpClients.createDefault()) {
+			HttpPost httpPost = new HttpPost(apiUrl);
+			httpPost.setHeader("Authorization", "Bearer " + accessToken);
+			httpPost.setHeader("Content-Type", "application/json");
+			httpPost.setEntity(new StringEntity("{}", ContentType.APPLICATION_JSON));
+
+			String responseBody = httpClient.execute(httpPost, response -> {
+				String body = EntityUtils.toString(response.getEntity());
+				System.out.println("Response Body: " + body);
+
+				// then
+				assertEquals(200, response.getCode(), "Bearer 인증 실패");
+				return body;
+			});
+
+			// 응답 검증
+			JsonNode jsonNode = objectMapper.readTree(responseBody);
+			assertNotNull(jsonNode, "JSON 응답이 null입니다");
+
+			String prettyJson = objectMapper.writerWithDefaultPrettyPrinter().writeValueAsString(jsonNode);
+			System.out.println("API Response:");
+			System.out.println(prettyJson);
+		}
+	}
+}
diff --git a/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/OAuth2TokenSuccessTest.java b/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/OAuth2TokenSuccessTest.java
new file mode 100644
index 0000000..a9f7e50
--- /dev/null
+++ b/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/OAuth2TokenSuccessTest.java
@@ -0,0 +1,64 @@
+package com.eactive.eai.kjb.errors;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+import org.apache.hc.client5.http.classic.methods.HttpPost;
+import org.apache.hc.client5.http.entity.UrlEncodedFormEntity;
+import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
+import org.apache.hc.client5.http.impl.classic.HttpClients;
+import org.apache.hc.core5.http.NameValuePair;
+import org.apache.hc.core5.http.io.entity.EntityUtils;
+import org.apache.hc.core5.http.message.BasicNameValuePair;
+import org.junit.jupiter.api.Test;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import java.util.ArrayList;
+import java.util.List;
+
+class OAuth2TokenSuccessTest {
+
+	private final ObjectMapper objectMapper = new ObjectMapper();
+
+	@Test
+	void testCase001_토큰발급성공() throws Exception {
+		// given
+		String url = TestConfig.getBaseUrl("/oauth2/token");
+
+		List<NameValuePair> params = new ArrayList<>();
+		params.add(new BasicNameValuePair("grant_type", "client_credentials"));
+		params.add(new BasicNameValuePair("client_id", "AyeWx0OpYLJbHpZ21DDSxYfQPmD5Ckn8"));
+		params.add(new BasicNameValuePair("client_secret", "KwBYJT1m1v3SUvzN2HPHhy2Ad9Q2GADbgWkYZZg9Ybbc8R1uEuBJNQ9oVl13b1qiXwYvDWTaX0EanxY4SMjNfnBBsZzfNoMwwDPTb3IjQy5k3CRxTAYzcSnmzlC4FSsG"));
+		params.add(new BasicNameValuePair("scope", "api"));
+
+		// when
+		try (CloseableHttpClient httpClient = HttpClients.createDefault()) {
+			HttpPost httpPost = new HttpPost(url);
+			httpPost.setEntity(new UrlEncodedFormEntity(params));
+
+			String responseBody = httpClient.execute(httpPost, response -> {
+				String body = EntityUtils.toString(response.getEntity());
+				System.out.println("Response Body: " + body);
+
+				// then
+				assertEquals(200, response.getCode());
+				return body;
+			});
+
+			// 응답 검증
+			JsonNode jsonNode = objectMapper.readTree(responseBody);
+			assertNotNull(jsonNode, "JSON 응답이 null입니다");
+
+			// OAuth2 토큰 응답 필드 확인
+			assertNotNull(jsonNode.get("access_token"), "access_token 필드가 없습니다");
+			assertNotNull(jsonNode.get("token_type"), "token_type 필드가 없습니다");
+			assertNotNull(jsonNode.get("expires_in"), "expires_in 필드가 없습니다");
+
+			String prettyJson = objectMapper.writerWithDefaultPrettyPrinter().writeValueAsString(jsonNode);
+			System.out.println("Token Response:");
+			System.out.println(prettyJson);
+		}
+	}
+}
diff --git a/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/TestConfig.java b/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/TestConfig.java
new file mode 100644
index 0000000..ad2c912
--- /dev/null
+++ b/kjb-errors/src/test/java/com/eactive/eai/kjb/errors/TestConfig.java
@@ -0,0 +1,34 @@
+package com.eactive.eai.kjb.errors;
+
+public class TestConfig {
+
+	private static final String DEFAULT_HOST = "127.0.0.1";
+	private static final String DEFAULT_PORT = "30110";
+
+	/**
+	 * 테스트 서버 호스트 반환
+	 * 시스템 프로퍼티 test.host가 있으면 사용, 없으면 127.0.0.1
+	 * @return 호스트 주소
+	 */
+	public static String getHost() {
+		return System.getProperty("test.host", DEFAULT_HOST);
+	}
+
+	/**
+	 * 테스트 서버 포트 반환
+	 * 시스템 프로퍼티 test.port가 있으면 사용, 없으면 30110
+	 * @return 포트 번호
+	 */
+	public static String getPort() {
+		return System.getProperty("test.port", DEFAULT_PORT);
+	}
+
+	/**
+	 * 테스트 베이스 URL 생성
+	 * @param path API 경로 (예: "/oauth/token")
+	 * @return 전체 URL
+	 */
+	public static String getBaseUrl(String path) {
+		return String.format("http://%s:%s%s", getHost(), getPort(), path);
+	}
+}
diff --git a/src/main/java/com/eactive/eai/adapter/controller/ApiAdapterController.java b/src/main/java/com/eactive/eai/adapter/controller/ApiAdapterController.java
index e2d424b..f79e0a1 100644
--- a/src/main/java/com/eactive/eai/adapter/controller/ApiAdapterController.java
+++ b/src/main/java/com/eactive/eai/adapter/controller/ApiAdapterController.java
@@ -87,8 +87,10 @@ public class ApiAdapterController implements HttpAdapterServiceKey {
 
         if (adptUri == null) {
             logError(servletRequest);
-//            throw new Exception("can not find Adapter Uri");
-            return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body("can not find Adapter Uri");
+            String errorMsg = MessageUtil.makeJsonErrorMessage(MessageUtil.ERROR_CODE_SERVICE_NOT_FOUND, "can not find Adapter Uri");
+            return ResponseEntity.status(HttpStatus.NOT_FOUND)
+                    .contentType(MediaType.APPLICATION_JSON)
+                    .body(errorMsg);
         }        
         
         //Received time , jwhong
@@ -100,8 +102,10 @@ public class ApiAdapterController implements HttpAdapterServiceKey {
         AdapterGroupVO adapterGroupVO = AdapterManager.getInstance().getAdapterGroupVO(adapterGroupName);
         AdapterVO adapterVO = AdapterManager.getInstance().getAdapterVO(adapterGroupName, adapterName);
         if (adapterVO == null) {
-//            throw new Exception("Adapter not found error");
-            return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body("Adapter not found error");
+            String errorMsg = MessageUtil.makeJsonErrorMessage(MessageUtil.ERROR_CODE_AP_ERROR, "Adapter not found error");
+            return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR)
+                    .contentType(MediaType.APPLICATION_JSON)
+                    .body(errorMsg);
         }
 
         Properties httpProp = AdapterPropManager.getInstance().getProperties(adapterVO.getPropGroupName());
@@ -152,17 +156,19 @@ public class ApiAdapterController implements HttpAdapterServiceKey {
             }
         } catch (HttpStatusException e) {
             logger.warn("ApiAdapterController] " + adapterGroupName + "-" + adapterName + ">>" + e.getMessage());
-            String errorMsg = MessageUtil.makeErrorMessageByMessageType(adptMsgType, encode, e.getCode(),
+            String errorMsg = MessageUtil.makeErrorMessageByMessageType(adptMsgType, encode, MessageUtil.ERROR_CODE_AP_ERROR,
                     e.getMessage(), errorResponseFormat);
             responseEntity = ResponseEntity.status(e.getStatus()).contentType(mediaType).body(errorMsg);
         } catch (JwtAuthException e) {
             logger.error(adapterGroupName + "-" + adapterName + ">>" + e.getMessage(), e);
-            String errorMsg = MessageUtil.makeErrorMessageByMessageType(adptMsgType, encode, e.getCode(),
+            String errorMsg = MessageUtil.makeErrorMessageByMessageType(adptMsgType, encode, MessageUtil.ERROR_CODE_AUTH_FAIL,
                     e.getMessage(), errorResponseFormat);
             responseEntity = ResponseEntity.status(HttpStatus.UNAUTHORIZED).contentType(mediaType).body(errorMsg);
         } catch (Exception e) {
             logger.error(adapterGroupName + "-" + adapterName + ">>" + e.getMessage(), e);
-            responseEntity = ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).contentType(mediaType).body(e);
+            String errorMsg = MessageUtil.makeErrorMessageByMessageType(adptMsgType, encode, MessageUtil.ERROR_CODE_AP_ERROR,
+                    e.getMessage(), errorResponseFormat);
+            responseEntity = ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).contentType(mediaType).body(errorMsg);
         } finally {
             /**
              * 로깅 인터셉터에 데이터를 전달하기 위한 처리
diff --git a/src/main/java/com/eactive/eai/authserver/config/WebMvcConfig.java b/src/main/java/com/eactive/eai/authserver/config/WebMvcConfig.java
new file mode 100644
index 0000000..ad56833
--- /dev/null
+++ b/src/main/java/com/eactive/eai/authserver/config/WebMvcConfig.java
@@ -0,0 +1,65 @@
+package com.eactive.eai.authserver.config;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.converter.HttpMessageNotReadableException;
+import org.springframework.security.access.AccessDeniedException;
+import org.springframework.security.core.AuthenticationException;
+import org.springframework.validation.BindException;
+import org.springframework.web.bind.MethodArgumentNotValidException;
+import org.springframework.web.bind.MissingServletRequestParameterException;
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.servlet.NoHandlerFoundException;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+@Configuration
+@ControllerAdvice
+public class WebMvcConfig {
+
+    @ExceptionHandler({
+        HttpMessageNotReadableException.class,
+        MethodArgumentNotValidException.class,
+        MissingServletRequestParameterException.class,
+        BindException.class
+    })
+    public String handleBadRequest(HttpServletRequest request, HttpServletResponse response, Exception ex) {
+        response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
+        request.setAttribute("_authServerStatusCode", HttpServletResponse.SC_BAD_REQUEST);
+        request.setAttribute("errorMessage", "400 Bad Request");
+        return "forward:/error.jsp";
+    }
+
+    @ExceptionHandler(NoHandlerFoundException.class)
+    public String handleNotFound(HttpServletRequest request, HttpServletResponse response, Exception ex) {
+        response.setStatus(HttpServletResponse.SC_NOT_FOUND);
+        request.setAttribute("_authServerStatusCode", HttpServletResponse.SC_NOT_FOUND);
+        request.setAttribute("errorMessage", "404 Not Found");
+        return "forward:/error.jsp";
+    }
+
+    @ExceptionHandler(AuthenticationException.class)
+    public String handleUnauthorized(HttpServletRequest request, HttpServletResponse response, Exception ex) {
+        response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
+        request.setAttribute("_authServerStatusCode", HttpServletResponse.SC_UNAUTHORIZED);
+        request.setAttribute("errorMessage", "401 Unauthorized");
+        return "forward:/error.jsp";
+    }
+
+    @ExceptionHandler(AccessDeniedException.class)
+    public String handleAccessDenied(HttpServletRequest request, HttpServletResponse response, Exception ex) {
+        response.setStatus(HttpServletResponse.SC_FORBIDDEN);
+        request.setAttribute("_authServerStatusCode", HttpServletResponse.SC_FORBIDDEN);
+        request.setAttribute("errorMessage", "403 Forbidden");
+        return "forward:/error.jsp";
+    }
+
+    @ExceptionHandler(Exception.class)
+    public String handleException(HttpServletRequest request, HttpServletResponse response, Exception ex) {
+        response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
+        request.setAttribute("_authServerStatusCode", HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
+        request.setAttribute("errorMessage", ex.getMessage());
+        return "forward:/error.jsp";
+    }
+}
diff --git a/src/main/java/com/eactive/eai/authserver/config/WebSecurityConfig.java b/src/main/java/com/eactive/eai/authserver/config/WebSecurityConfig.java
index f61bad2..e968562 100644
--- a/src/main/java/com/eactive/eai/authserver/config/WebSecurityConfig.java
+++ b/src/main/java/com/eactive/eai/authserver/config/WebSecurityConfig.java
@@ -14,6 +14,8 @@ import org.springframework.security.core.userdetails.UserDetailsService;
 import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
 import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
 
+import javax.servlet.http.HttpServletResponse;
+
 @Configuration
 @EnableWebSecurity
 @Order(1)
@@ -29,8 +31,23 @@ public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
     			.headers().frameOptions().disable()
     			.and()
     			.authorizeRequests()
+    			.antMatchers("/error.jsp").permitAll()
     			.antMatchers("/**").permitAll()
     			.and()
+    			.exceptionHandling()
+    			.authenticationEntryPoint((request, response, authException) -> {
+    				response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
+    				request.setAttribute("_authServerStatusCode", HttpServletResponse.SC_UNAUTHORIZED);
+    				request.setAttribute("errorMessage", "401 Unauthorized");
+    				request.getRequestDispatcher("/error.jsp").forward(request, response);
+    			})
+    			.accessDeniedHandler((request, response, accessDeniedException) -> {
+    				response.setStatus(HttpServletResponse.SC_FORBIDDEN);
+    				request.setAttribute("_authServerStatusCode", HttpServletResponse.SC_FORBIDDEN);
+    				request.setAttribute("errorMessage", "403 Forbidden");
+    				request.getRequestDispatcher("/error.jsp").forward(request, response);
+    			})
+    			.and()
     			.formLogin();
 //    			.and()
 //    			.httpBasic();
diff --git a/src/main/java/com/eactive/eai/authserver/custom/BearerTokenContoller.java b/src/main/java/com/eactive/eai/authserver/custom/BearerTokenContoller.java
index bda62ca..d3d547f 100644
--- a/src/main/java/com/eactive/eai/authserver/custom/BearerTokenContoller.java
+++ b/src/main/java/com/eactive/eai/authserver/custom/BearerTokenContoller.java
@@ -21,6 +21,7 @@ import org.springframework.web.bind.annotation.RestController;
 import com.eactive.eai.adapter.http.dynamic.filter.JwtAuthException;
 import com.eactive.eai.authserver.service.OAuth2Manager;
 import com.eactive.eai.common.util.Logger;
+import com.eactive.eai.common.util.MessageUtil;
 
 @RestController
 @RequestMapping("/auth/oauth/v2")
@@ -75,20 +76,12 @@ public class BearerTokenContoller {
 	        return ResponseEntity.ok(resObject);
 		} catch (JwtAuthException e) {
 			logger.error(e);
-
-			JSONObject errorJson = new JSONObject();
-			errorJson.put("error", e.getCode());
-			errorJson.put("error_description", e.getMessage());
-			resObject.putAll(errorJson);
-			return ResponseEntity.status(401).body(resObject);
+			String errorJson = MessageUtil.makeJsonErrorMessage(MessageUtil.ERROR_CODE_AUTH_FAIL, e.getMessage());
+			return ResponseEntity.status(401).body(errorJson);
 		} catch (Exception e) {
 			logger.error(e);
-
-			JSONObject errorJson = new JSONObject();
-			errorJson.put("error", "invalid_request");
-			errorJson.put("error_description", e.getMessage());
-			resObject.putAll(errorJson);
-			return ResponseEntity.status(500).body(resObject);
+			String errorJson = MessageUtil.makeJsonErrorMessage(MessageUtil.ERROR_CODE_AP_ERROR, e.getMessage());
+			return ResponseEntity.status(500).body(errorJson);
 		}
     }
 
diff --git a/src/main/java/com/eactive/eai/authserver/custom/BearerTokenFilter.java b/src/main/java/com/eactive/eai/authserver/custom/BearerTokenFilter.java
index d993d30..5ccb70c 100644
--- a/src/main/java/com/eactive/eai/authserver/custom/BearerTokenFilter.java
+++ b/src/main/java/com/eactive/eai/authserver/custom/BearerTokenFilter.java
@@ -16,6 +16,7 @@ import org.springframework.web.filter.OncePerRequestFilter;
 
 import com.eactive.eai.adapter.http.dynamic.filter.JwtAuthException;
 import com.eactive.eai.common.util.Logger;
+import com.eactive.eai.common.util.MessageUtil;
 
 @Component
 public class BearerTokenFilter extends OncePerRequestFilter{
@@ -35,8 +36,6 @@ public class BearerTokenFilter extends OncePerRequestFilter{
     protected void doFilterInternal(HttpServletRequest request,
                                     HttpServletResponse response,
                                     FilterChain filterChain) throws IOException, ServletException {
-		JSONObject resObject = new JSONObject();
-
         try {
         	String auth = request.getHeader("Authorization");
 
@@ -62,23 +61,16 @@ public class BearerTokenFilter extends OncePerRequestFilter{
             filterChain.doFilter(request, response);
 		} catch (JwtAuthException jae) {
 			logger.debug(jae.getMessage());
-
-			JSONObject errorJson = new JSONObject();
-			errorJson.put("error", jae.getCode());
-			errorJson.put("error_description", jae.getMessage());
-			resObject.putAll(errorJson);
-			response.setStatus(HttpServletResponse.SC_UNAUTHORIZED); // 401 설정
+			String errorJson = MessageUtil.makeJsonErrorMessage(MessageUtil.ERROR_CODE_AUTH_FAIL, jae.getMessage());
+			response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
 			response.setContentType("application/json;charset=UTF-8");
-			response.getWriter().write(resObject.toJSONString());
+			response.getWriter().write(errorJson);
 		} catch (Exception e) {
 			logger.error(e.getMessage());
-			JSONObject errorJson = new JSONObject();
-			errorJson.put("error", "invalid_request");
-			errorJson.put("error_description", e.getMessage());
-			resObject.putAll(errorJson);
-			response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); // 500 설정
+			String errorJson = MessageUtil.makeJsonErrorMessage(MessageUtil.ERROR_CODE_AP_ERROR, e.getMessage());
+			response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
 			response.setContentType("application/json;charset=UTF-8");
-			response.getWriter().write(resObject.toJSONString());
+			response.getWriter().write(errorJson);
 		}
     }
 }
diff --git a/src/main/java/com/eactive/eai/authserver/custom/KjbMGOAuth2Controller.java b/src/main/java/com/eactive/eai/authserver/custom/KjbMGOAuth2Controller.java
index 5918d96..00781b8 100644
--- a/src/main/java/com/eactive/eai/authserver/custom/KjbMGOAuth2Controller.java
+++ b/src/main/java/com/eactive/eai/authserver/custom/KjbMGOAuth2Controller.java
@@ -1,14 +1,11 @@
 package com.eactive.eai.authserver.custom;
 
 import java.nio.charset.StandardCharsets;
-import java.security.KeyFactory;
 import java.security.KeyPair;
 import java.security.KeyPairGenerator;
 import java.security.Principal;
-import java.security.PublicKey;
 import java.security.SecureRandom;
 import java.security.Signature;
-import java.security.spec.X509EncodedKeySpec;
 import java.time.LocalDateTime;
 import java.util.Base64;
 import java.util.HashMap;
@@ -39,7 +36,6 @@ import org.springframework.web.bind.annotation.ResponseBody;
 
 import com.eactive.eai.adapter.http.dynamic.filter.JwtAuthException;
 import com.eactive.eai.authserver.config.IssueLimitOAuth2Exception;
-import com.eactive.eai.authserver.config.AuthorizationServerConfig;
 import com.eactive.eai.authserver.config.RequestContextData;
 import com.eactive.eai.authserver.dao.TokenIssuanceLogDAO;
 import com.eactive.eai.authserver.service.OAuth2Manager;
@@ -48,8 +44,10 @@ import com.eactive.eai.authserver.vo.ClientVO;
 import com.eactive.eai.common.dao.DAOException;
 import com.eactive.eai.common.logger.EAIDBLogControl;
 import com.eactive.eai.common.util.Logger;
+import com.eactive.eai.common.util.MessageUtil;
 import com.eactive.eai.common.util.UUID;
 import com.eactive.eai.data.entity.onl.authserver.TokenIssuanceLog;
+import com.fasterxml.jackson.databind.ObjectMapper;
 
 @Controller
 public class KjbMGOAuth2Controller { 
@@ -63,7 +61,7 @@ public class KjbMGOAuth2Controller {
 
 	@RequestMapping(value = "/mapi/oauth2/token", method = RequestMethod.POST, produces = "application/json; charset=\"UTF-8\"")
 	@ResponseBody
-	public KjbMGOAuth2AccessTokenResponse token(@RequestBody KjbMGOAuth2AccessTokenRequest tokenRequest,
+	public ResponseEntity<String> token(@RequestBody KjbMGOAuth2AccessTokenRequest tokenRequest,
 			HttpServletRequest request, HttpServletResponse response) {
 		if (logger.isDebug()) {
 			logger.debug(tokenRequest.toString());
@@ -96,7 +94,7 @@ public class KjbMGOAuth2Controller {
 			ClientDetails clientDetails = OAuth2Manager.getInstance().getClientDeatilsStore().get(clientId);
 			verifyClient(clientDetails, clientId, scopeSet);
 
-			String traceId = UUID.randomUUID().toString().replace("-", ""); 
+			String traceId = UUID.randomUUID().toString().replace("-", "");
 			response.setHeader(HEADER_TRACEID, traceId);
 
 			HashMap<String, String> authorizationParameters = new HashMap<String, String>();
@@ -123,19 +121,22 @@ public class KjbMGOAuth2Controller {
 			responseToken.setExpiresOn(System.currentTimeMillis() + (token.getExpiresIn() * 1000));
 			responseToken.setScope(tokenRequest.getScope());
 			responseToken.setResource(tokenRequest.getResource());
+
+			// 성공 시 JSON 문자열로 변환하여 반환
+			ObjectMapper mapper = new ObjectMapper();
+			String successJson = mapper.writeValueAsString(responseToken);
+			return ResponseEntity.ok(successJson);
+
 		} catch (JwtAuthException e) {
-			response.setStatus(NumberUtils.toInt(StringUtils.left(e.getCode(), 3), HttpStatus.UNAUTHORIZED.value()));
-			responseToken.setResponseCode(e.getCode());
-			responseToken.setResponseMessage(e.getMessage());
+			String errorJson = MessageUtil.makeJsonErrorMessage(MessageUtil.ERROR_CODE_AUTH_FAIL, e.getMessage());
+			int statusCode = NumberUtils.toInt(StringUtils.left(e.getCode(), 3), HttpStatus.UNAUTHORIZED.value());
+			return ResponseEntity.status(statusCode).body(errorJson);
+
 		} catch (Exception e) {
 			logger.error(e.getMessage());
-			response.setStatus(HttpStatus.UNAUTHORIZED.value());
-			responseToken.setResponseCode(
-					String.format("%d%s%s", HttpStatus.UNAUTHORIZED.value(), SERVICE_CODE_ACCESS_TOKEN, "00"));
-			responseToken.setResponseMessage("Unauthorized. [Unknown]");
+			String errorJson = MessageUtil.makeJsonErrorMessage(MessageUtil.ERROR_CODE_AUTH_FAIL, "Unauthorized. [Unknown]");
+			return ResponseEntity.status(HttpStatus.UNAUTHORIZED).body(errorJson);
 		}
-
-		return responseToken;
 	}
 
 	private void verifyClient(ClientDetails clientDetails, String clientId, Set<String> scopeSet)
diff --git a/src/main/java/com/eactive/eai/custom/inflow/InflowControlManagerSBI.java b/src/main/java/com/eactive/eai/custom/inflow/InflowControlManagerSBI.java
deleted file mode 100644
index 2b3f635..0000000
--- a/src/main/java/com/eactive/eai/custom/inflow/InflowControlManagerSBI.java
+++ /dev/null
@@ -1,425 +0,0 @@
-package com.eactive.eai.custom.inflow;
-
-import java.time.Duration;
-import java.util.Arrays;
-import java.util.Calendar;
-import java.util.HashMap;
-import java.util.Iterator;
-import java.util.List;
-import java.util.Map;
-import java.util.Properties;
-
-import org.apache.commons.lang3.StringUtils;
-
-import com.eactive.eai.common.dao.DAOFactory;
-import com.eactive.eai.common.exception.ExceptionUtil;
-import com.eactive.eai.common.inflow.CustomBucket;
-import com.eactive.eai.common.inflow.InflowControlDAO;
-import com.eactive.eai.common.inflow.InflowControlManager;
-import com.eactive.eai.common.inflow.InflowTargetVO;
-import com.eactive.eai.common.lifecycle.Lifecycle;
-import com.eactive.eai.common.lifecycle.LifecycleException;
-import com.eactive.eai.common.lifecycle.LifecycleListener;
-import com.eactive.eai.common.lifecycle.LifecycleSupport;
-import com.eactive.eai.common.message.EAIMessage;
-import com.eactive.eai.common.property.PropManager;
-import com.eactive.eai.common.server.EAIServerManager;
-import com.eactive.eai.common.util.Logger;
-import com.eactive.eai.common.util.MessageUtil;
-import com.eactive.eai.message.service.InterfaceMapper;
-import com.ext.eai.common.stdmessage.STDMessageKeys;
-
-import io.github.bucket4j.Bandwidth;
-import io.github.bucket4j.Bucket4j;
-import io.github.bucket4j.local.LocalBucketBuilder;
-
-public class InflowControlManagerSBI implements Lifecycle, com.eactive.eai.common.inflow.Bucket
-{ 
-    static Logger logger = Logger.getLogger(Logger.LOGGER_DEFAULT);
-    
-    private static InflowControlManagerSBI manager;
-    
-    private HashMap<String,CustomBucket> adapterBucketList;
-    private HashMap<String,CustomBucket> interfaceBucketList;
-    private boolean started;
-    private LifecycleSupport lifecycle = new LifecycleSupport(this);
-	
-   /** 
-    * 1. 기능 :  Default Constructor
-    * 2. 처리 개요 : C2RServiceVO Rule 정보를 저장하기 위한 HashMap을 초기화한다.
-    * 3. 주의사항 
-    *
-    **/
-    private InflowControlManagerSBI() {
-    	adapterBucketList = new HashMap<String, CustomBucket>();
-    	interfaceBucketList = new HashMap<String, CustomBucket>();
-    }
-    
-    /** 
-    * 1. 기능 :  InflowControlManagerSBI Singleton Object를 반환하는 getter method
-    * 2. 처리 개요 : C2RServiceManager Singleton Object를 반환한다.
-    * 3. 주의사항 
-    *
-    * @return   InflowControlManagerSBI Singleton object
-    **/
-    public static InflowControlManagerSBI getInstance() {
-        if(manager == null) {
-            synchronized(InflowControlManagerSBI.class) {
-                if(manager == null) {
-                    manager = new InflowControlManagerSBI();   
-                }   
-            }
-        }
-        
-        return manager;
-    }
-    
-    public static com.eactive.eai.common.inflow.Bucket getBucket() {
-        if(manager == null) {
-            synchronized(InflowControlManagerSBI.class) {
-                if(manager == null) {
-                    manager = new InflowControlManagerSBI();   
-                }   
-            }
-        }
-        
-        return manager;
-    }
-    
-    /**
-     * 유량제어 대상인 거래인지 체크한다.(사이트에 맞게 구성)
-     * @param eaiServerManager
-     * @param eaiMessage
-     * @return
-     */
-	public static Boolean isTargetOfInflowControl(EAIServerManager eaiServerManager, EAIMessage eaiMessage) {
-		// 1. 모든 요청거래
-		InterfaceMapper mapper = eaiMessage.getMapper();
-		String returnType = mapper.getSendRecvDivision(eaiMessage.getStandardMessage()); // S|R
-
-		if (STDMessageKeys.SEND_RECV_CD_SEND.equals(returnType)) {
-			return new Boolean(true);
-		}
-
-		return new Boolean(false);
-	}
-    
-    public void start() throws LifecycleException {
-        if (started)
-            throw new LifecycleException("RECEAICMM201");
-        
-        // Notify our interested LifecycleListeners
-        lifecycle.fireLifecycleEvent(STARTING_EVENT, this);
-        
-        // C2RServiceVO Table Initializing ....
-        
-        try {
-            init();
-        } catch(Exception e) {
-            //throw new LifecycleException("RECEAICMM202");
-            throw new LifecycleException(ExceptionUtil.getErrorCode(e,"RECEAICMM202"));
-        }
-        
-        started = true;
-        // Notify our interested LifecycleListeners
-        lifecycle.fireLifecycleEvent(STARTED_EVENT, this);
-    }
-    
-    private void init() throws Exception  {
-    	initAdapter();
-    	initInterface();
-    }
-
-	private void initAdapter() throws Exception {
-		// Initializing ....
-		adapterBucketList = new HashMap<String, CustomBucket>();
-		InflowControlDAO dao = null;
-		dao = (InflowControlDAO) DAOFactory.newInstance().create(InflowControlDAO.class);
-		List<InflowTargetVO> inflowAdapterVoList = dao.getInflowAdapterList();
-
-		for (InflowTargetVO inflowVo : inflowAdapterVoList) {
-			if (InflowControlManagerSBI.isInflowTarget(inflowVo)) {
-				CustomBucket bucket = makeBucketUsingInflowVO(inflowVo);
-				if (bucket != null) {
-					adapterBucketList.put(inflowVo.getName(), bucket);
-				}
-			}
-		}
-	}
-
-	private void initInterface() throws Exception {
-		// Initializing ....
-		interfaceBucketList = new HashMap<String, CustomBucket>();
-		InflowControlDAO dao = null;
-		dao = (InflowControlDAO) DAOFactory.newInstance().create(InflowControlDAO.class);
-		List<InflowTargetVO> inflowInterfaceVoList = dao.getInflowInterfaceList();
-
-		for (InflowTargetVO inflowVo : inflowInterfaceVoList) {
-			if (InflowControlManagerSBI.isInflowTarget(inflowVo)) {
-				CustomBucket bucket = makeBucketUsingInflowVO(inflowVo);
-				if (bucket != null) {
-					interfaceBucketList.put(inflowVo.getName(), bucket);
-				}
-			}
-		}
-	}
-    
-    public synchronized void reloadAdapter() throws Exception {
-    	if(logger.isWarn()) {
-    		logger.warn("InflowControlManagerSBI] reload all Started ...");
-    	}
-    	initAdapter();
-    	if(logger.isWarn()) {
-    		logger.warn("InflowControlManagerSBI] reload all finished ...");
-    	}
-    }
-    public synchronized void reloadInterface() throws Exception {
-    	if(logger.isWarn()) {
-    		logger.warn("InflowControlManagerSBI] reload all Started ...");
-    	}
-    	initInterface();
-    	if(logger.isWarn()) {
-    		logger.warn("InflowControlManagerSBI] reload all finished ...");
-    	}
-    }
-    
-	public synchronized void reloadAdapter(String adapter) throws Exception {
-		if (logger.isWarn()) {
-			logger.warn("InflowControlManagerSBI] reload Started ...");
-		}
-		InflowControlDAO dao = null;
-		dao = (InflowControlDAO) DAOFactory.newInstance().create(InflowControlDAO.class);
-		Map<String, InflowTargetVO> map = dao.getInflowTargetByAdater(adapter);
-		if (map != null) {
-			Iterator it = map.keySet().iterator();
-			String key = "";
-			for (int i = 0; it.hasNext(); i++) {
-				key = (String) it.next();
-
-				InflowTargetVO inflowTarget = map.get(key);
-				if (InflowControlManagerSBI.isInflowTarget(inflowTarget)) {
-					CustomBucket bucket = makeBucketUsingInflowVO(inflowTarget);
-					if (bucket != null) {
-						adapterBucketList.put(inflowTarget.getName(), bucket);
-					} else {
-						adapterBucketList.remove(inflowTarget.getName());
-					}
-				} else {
-					adapterBucketList.remove(inflowTarget.getName());
-				}
-			}
-		}
-		if (logger.isWarn()) {
-			logger.warn("InflowControlManagerSBI] reload finished ...");
-		}
-	}
-	public synchronized void reloadInterface(String inter) throws Exception {
-		if (logger.isWarn()) {
-			logger.warn("InflowControlManagerSBI] reload Started ...");
-		}
-		InflowControlDAO dao = null;
-		dao = (InflowControlDAO) DAOFactory.newInstance().create(InflowControlDAO.class);
-		Map<String, InflowTargetVO> map = dao.getInflowTargetByInterface(inter);
-		if (map != null) {
-			Iterator it = map.keySet().iterator();
-			String key = "";
-			for (int i = 0; it.hasNext(); i++) {
-				key = (String) it.next();
-				
-				InflowTargetVO inflowTarget = map.get(key);
-				if (InflowControlManagerSBI.isInflowTarget(inflowTarget)) {
-					CustomBucket bucket = makeBucketUsingInflowVO(inflowTarget);
-					if (bucket != null) {
-						interfaceBucketList.put(inflowTarget.getName(), bucket);
-					} else {
-						interfaceBucketList.remove(inflowTarget.getName());
-					}
-				} else {
-					interfaceBucketList.remove(inflowTarget.getName());
-				}
-			}
-		}
-		
-		if (logger.isWarn()) {
-			logger.warn("InflowControlManagerSBI] reload finished ...");
-		}
-	}
-    
-    /** 
-    * 1. 기능 :  Lifecycle의 stop 메서드로 C2RServiceManager를 종료하는 메서드
-    * 2. 처리 개요 : 멤버에 캐싱한 C2RServiceVO Rule 정보를 clear한다.
-    * 3. 주의사항 
-    *
-    * @exception    LifecycleException  이미 종료된 경우 발생(RECEAICMM203)
-    **/
-    public void stop() throws LifecycleException {
-        // Validate and update our current component state
-        if (!started)
-            throw new LifecycleException("RECEAICMM203");
-		
-        // Notify our interested LifecycleListeners
-        lifecycle.fireLifecycleEvent(STOPING_EVENT, this);
-        
-        adapterBucketList.clear();
-        interfaceBucketList.clear();
-        
-        started = false;
-        // Notify our interested LifecycleListeners
-        lifecycle.fireLifecycleEvent(STOPPED_EVENT, this);
-    }
-    
-    /** 
-    * 1. 기능 :  LifecycleListener를 등록하는 메서드
-    * 2. 처리 개요 : LifecycleListener를 등록한다.
-    * 3. 주의사항 
-    *
-    * @param    listener    LifecycleEvent를 수신한 LifecycleListener
-    **/
-    public void addLifecycleListener(LifecycleListener listener)
-    {
-        lifecycle.addLifecycleListener(listener);
-    }
-
-    public LifecycleListener[] findLifecycleListeners()
-    {
-        return lifecycle.findLifecycleListeners();
-    }
-
-    public void removeLifecycleListener(LifecycleListener listener)
-    {
-        lifecycle.removeLifecycleListener(listener);
-    }
-    
-    public boolean isStarted() {
-        return this.started;   
-    }
-
-    public String[] getAdapterAllKeys() {  
-        Iterator it = this.adapterBucketList.keySet().iterator(); 
-        String[] svcCd = new String[this.adapterBucketList.size()];  
-        for(int i = 0; it.hasNext(); i++){
-            svcCd[i] = (String)it.next();
-        }
-        Arrays.sort(svcCd);
-        return svcCd;
-    }
-    public String[] getInterfaceAllKeys() {  
-    	Iterator it = this.interfaceBucketList.keySet().iterator(); 
-    	String[] svcCd = new String[this.interfaceBucketList.size()];  
-    	for(int i = 0; it.hasNext(); i++){
-    		svcCd[i] = (String)it.next();
-    	}
-    	Arrays.sort(svcCd);
-    	return svcCd;
-    }
-    
-    public void removeAdapter(String adapter) {
-    	adapterBucketList.remove(adapter);
-    }
-    public void removeInterface(String inter) {
-    	interfaceBucketList.remove(inter);
-    }
-    
-	private CustomBucket makeBucketUsingInflowVO(InflowTargetVO inflowTarget) {
-		if (InflowControlManagerSBI.isInflowTarget(inflowTarget)) {
-			LocalBucketBuilder builder = Bucket4j.builder();
-			if (inflowTarget.getThresholdPerSecond() > 0) { // TPS
-				builder.addLimit(Bandwidth.simple(inflowTarget.getThresholdPerSecond(), Duration.ofSeconds(1)));
-			}
-
-			if (inflowTarget.getThreshold() > 0 && StringUtils.isNotBlank(inflowTarget.getThresholdTimeUnit())) {
-				builder.addLimit(Bandwidth.simple(inflowTarget.getThreshold(),
-						InflowControlManagerSBI.getPeriod(inflowTarget.getThresholdTimeUnit())));
-			}
-
-			return new CustomBucket(builder.build(), inflowTarget);
-		}
-
-		return null;
-	}
-
-	@Override
-	public boolean isAdapterPass(String adapter) {
-		CustomBucket b = adapterBucketList.get(adapter);
-		
-		if ( b == null ) return true;
-		
-		return b.getLocalBucket().tryConsume(1);
-	}
-
-	@Override
-	public boolean isInterfacePass(String inter) {
-		CustomBucket b = interfaceBucketList.get(inter);
-		
-		if ( b == null ) return true;
-		
-		return b.getLocalBucket().tryConsume(1);
-	}
-
-	@Override
-	public InflowTargetVO getAdapterInflowThreashold(String adapter) {
-		CustomBucket b = adapterBucketList.get(adapter);
-		if (b == null) return null;
-		return b.getInflowTargetVo();
-	}
-
-	@Override
-	public InflowTargetVO getInterfaceInflowThreashold(String inter) {
-		CustomBucket b = interfaceBucketList.get(inter);
-		if (b == null) return null;
-		return b.getInflowTargetVo();
-	}
-	
-	@Override
-	public InflowTargetVO getInflowThreashold(String inter) {
-		return null;
-	}
-	
-	public InflowTargetVO getAdapterInflow(String adapter) {
-		CustomBucket b = adapterBucketList.get(adapter);
-		if (b == null) return null;
-		return b.getInflowTargetVo();
-	}
-	
-	public InflowTargetVO getInterfaceInflow(String inter) {
-		CustomBucket b = interfaceBucketList.get(inter);
-		if (b == null) return null;
-		return b.getInflowTargetVo();
-	}
-	
-	public static boolean isInflowTarget(InflowTargetVO inflowTarget) {
-		if (inflowTarget == null || !inflowTarget.isActivate()) {
-			return false;
-		}
-
-		if (inflowTarget.getThresholdPerSecond() > 0) {
-			return true;
-		}
-
-		if (inflowTarget.getThreshold() > 0 && StringUtils.equalsAnyIgnoreCase(inflowTarget.getThresholdTimeUnit(),
-				InflowControlManager.QUOTA_TIMEUNIT_DAY, InflowControlManager.QUOTA_TIMEUNIT_SECOND,
-				InflowControlManager.QUOTA_TIMEUNIT_MINUTE, InflowControlManager.QUOTA_TIMEUNIT_HOUR,
-				InflowControlManager.QUOTA_TIMEUNIT_DAY, InflowControlManager.QUOTA_TIMEUNIT_MONTH)) {
-			return true;
-		}
-
-		return false;
-	}
-
-	public static Duration getPeriod(String timeUnit) {
-		if (StringUtils.equalsIgnoreCase(timeUnit, InflowControlManager.QUOTA_TIMEUNIT_SECOND)) {
-			return Duration.ofSeconds(1);
-		} else if (StringUtils.equalsIgnoreCase(timeUnit, InflowControlManager.QUOTA_TIMEUNIT_MINUTE)) {
-			return Duration.ofMinutes(1);
-		} else if (StringUtils.equalsIgnoreCase(timeUnit, InflowControlManager.QUOTA_TIMEUNIT_HOUR)) {
-			return Duration.ofHours(1);
-		} else if (StringUtils.equalsIgnoreCase(timeUnit, InflowControlManager.QUOTA_TIMEUNIT_DAY)) {
-			return Duration.ofDays(1);
-		} else if (StringUtils.equalsIgnoreCase(timeUnit, InflowControlManager.QUOTA_TIMEUNIT_MONTH)) {
-			Calendar calendar = Calendar.getInstance();
-			return Duration.ofDays(calendar.getActualMaximum(Calendar.DAY_OF_MONTH));
-		} else {
-			return null;
-		}
-	}
-} 
diff --git a/src/main/java/com/eactive/eai/manage/inflow/GroupBucketStatusDTO.java b/src/main/java/com/eactive/eai/manage/inflow/GroupBucketStatusDTO.java
new file mode 100644
index 0000000..64dd221
--- /dev/null
+++ b/src/main/java/com/eactive/eai/manage/inflow/GroupBucketStatusDTO.java
@@ -0,0 +1,101 @@
+package com.eactive.eai.manage.inflow;
+
+import java.util.List;
+
+public class GroupBucketStatusDTO {
+    private String groupId;
+    private String groupName;
+    private boolean activate;
+    private List<BucketInfo> buckets;
+
+    public static class BucketInfo {
+        private String type;           // "perSecond" | "threshold"
+        private long capacity;         // 최대 토큰 수
+        private long availableTokens;  // 현재 사용 가능한 토큰 수
+        private String timeUnit;       // threshold인 경우 시간 단위
+        private double usagePercent;   // 사용률 (100 - availableTokens/capacity * 100)
+
+        public BucketInfo() {}
+
+        public BucketInfo(String type, long capacity, long availableTokens, String timeUnit) {
+            this.type = type;
+            this.capacity = capacity;
+            this.availableTokens = availableTokens;
+            this.timeUnit = timeUnit;
+            this.usagePercent = capacity > 0 ?
+                Math.round((1.0 - (double) availableTokens / capacity) * 10000) / 100.0 : 0;
+        }
+
+        public String getType() {
+            return type;
+        }
+
+        public void setType(String type) {
+            this.type = type;
+        }
+
+        public long getCapacity() {
+            return capacity;
+        }
+
+        public void setCapacity(long capacity) {
+            this.capacity = capacity;
+        }
+
+        public long getAvailableTokens() {
+            return availableTokens;
+        }
+
+        public void setAvailableTokens(long availableTokens) {
+            this.availableTokens = availableTokens;
+        }
+
+        public String getTimeUnit() {
+            return timeUnit;
+        }
+
+        public void setTimeUnit(String timeUnit) {
+            this.timeUnit = timeUnit;
+        }
+
+        public double getUsagePercent() {
+            return usagePercent;
+        }
+
+        public void setUsagePercent(double usagePercent) {
+            this.usagePercent = usagePercent;
+        }
+    }
+
+    public String getGroupId() {
+        return groupId;
+    }
+
+    public void setGroupId(String groupId) {
+        this.groupId = groupId;
+    }
+
+    public String getGroupName() {
+        return groupName;
+    }
+
+    public void setGroupName(String groupName) {
+        this.groupName = groupName;
+    }
+
+    public boolean isActivate() {
+        return activate;
+    }
+
+    public void setActivate(boolean activate) {
+        this.activate = activate;
+    }
+
+    public List<BucketInfo> getBuckets() {
+        return buckets;
+    }
+
+    public void setBuckets(List<BucketInfo> buckets) {
+        this.buckets = buckets;
+    }
+}
diff --git a/src/main/java/com/eactive/eai/manage/inflow/InflowGroupBucketController.java b/src/main/java/com/eactive/eai/manage/inflow/InflowGroupBucketController.java
new file mode 100644
index 0000000..befff94
--- /dev/null
+++ b/src/main/java/com/eactive/eai/manage/inflow/InflowGroupBucketController.java
@@ -0,0 +1,56 @@
+package com.eactive.eai.manage.inflow;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/manage/inflow/group")
+public class InflowGroupBucketController {
+
+    @Autowired
+    private InflowGroupBucketService bucketService;
+
+    /**
+     * 특정 그룹의 버킷 상태 조회
+     * GET /manage/inflow/group/{groupId}/bucket-status
+     */
+    @GetMapping("/{groupId}/bucket-status")
+    public ResponseEntity<?> getGroupBucketStatus(@PathVariable String groupId) {
+        GroupBucketStatusDTO status = bucketService.getGroupBucketStatus(groupId);
+
+        if (status == null) {
+            Map<String, Object> error = new HashMap<>();
+            error.put("success", false);
+            error.put("message", "그룹을 찾을 수 없습니다: " + groupId);
+            return ResponseEntity.ok(error);
+        }
+
+        Map<String, Object> result = new HashMap<>();
+        result.put("success", true);
+        result.put("data", status);
+        return ResponseEntity.ok(result);
+    }
+
+    /**
+     * 모든 그룹의 버킷 상태 조회
+     * GET /manage/inflow/group/bucket-status
+     */
+    @GetMapping("/bucket-status")
+    public ResponseEntity<?> getAllGroupBucketStatus() {
+        List<GroupBucketStatusDTO> statusList = bucketService.getAllGroupBucketStatus();
+
+        Map<String, Object> result = new HashMap<>();
+        result.put("success", true);
+        result.put("data", statusList);
+        result.put("count", statusList.size());
+        return ResponseEntity.ok(result);
+    }
+}
diff --git a/src/main/java/com/eactive/eai/manage/inflow/InflowGroupBucketService.java b/src/main/java/com/eactive/eai/manage/inflow/InflowGroupBucketService.java
new file mode 100644
index 0000000..1bb4d6f
--- /dev/null
+++ b/src/main/java/com/eactive/eai/manage/inflow/InflowGroupBucketService.java
@@ -0,0 +1,105 @@
+package com.eactive.eai.manage.inflow;
+
+import java.lang.reflect.Field;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+
+import org.springframework.stereotype.Service;
+
+import com.eactive.eai.common.inflow.CustomGroupBucket;
+import com.eactive.eai.common.inflow.InflowControlManager;
+import com.eactive.eai.common.inflow.InflowGroupVO;
+
+@Service
+public class InflowGroupBucketService {
+
+    public GroupBucketStatusDTO getGroupBucketStatus(String groupId) {
+        InflowControlManager manager = InflowControlManager.getInstance();
+
+        InflowGroupVO groupVo = manager.getGroupInflowThreshold(groupId);
+        if (groupVo == null) {
+            return null;
+        }
+
+        GroupBucketStatusDTO dto = new GroupBucketStatusDTO();
+        dto.setGroupId(groupId);
+        dto.setGroupName(groupVo.getGroupName());
+        dto.setActivate(groupVo.isActivate());
+
+        List<GroupBucketStatusDTO.BucketInfo> buckets = new ArrayList<>();
+
+        // CustomGroupBucket에서 직접 토큰 조회
+        CustomGroupBucket customGroupBucket = getCustomGroupBucket(groupId);
+
+        // perSecond bucket
+        if (groupVo.getThresholdPerSecond() > 0) {
+            long capacity = groupVo.getThresholdPerSecond();
+            long available = capacity;
+            if (customGroupBucket != null) {
+                long tokens = customGroupBucket.getPerSecondAvailableTokens();
+                if (tokens >= 0) {
+                    available = Math.min(tokens, capacity);
+                }
+            }
+            buckets.add(new GroupBucketStatusDTO.BucketInfo(
+                "perSecond",
+                capacity,
+                available,
+                "SEC"
+            ));
+        }
+
+        // threshold bucket
+        if (groupVo.getThreshold() > 0) {
+            long capacity = groupVo.getThreshold();
+            long available = capacity;
+            if (customGroupBucket != null) {
+                long tokens = customGroupBucket.getThresholdAvailableTokens();
+                if (tokens >= 0) {
+                    available = Math.min(tokens, capacity);
+                }
+            }
+            buckets.add(new GroupBucketStatusDTO.BucketInfo(
+                "threshold",
+                capacity,
+                available,
+                groupVo.getThresholdTimeUnit()
+            ));
+        }
+
+        dto.setBuckets(buckets);
+        return dto;
+    }
+
+    /**
+     * 그룹 버킷 조회 (리플렉션 사용)
+     */
+    public CustomGroupBucket getCustomGroupBucket(String groupId) {
+        try {
+            InflowControlManager manager = InflowControlManager.getInstance();
+            Field field = InflowControlManager.class.getDeclaredField("groupBucketList");
+            field.setAccessible(true);
+            @SuppressWarnings("unchecked")
+            Map<String, CustomGroupBucket> groupBucketList =
+                (Map<String, CustomGroupBucket>) field.get(manager);
+            return groupBucketList.get(groupId);
+        } catch (Exception e) {
+            return null;
+        }
+    }
+
+    public List<GroupBucketStatusDTO> getAllGroupBucketStatus() {
+        InflowControlManager manager = InflowControlManager.getInstance();
+        String[] groupIds = manager.getGroupAllKeys();
+
+        List<GroupBucketStatusDTO> result = new ArrayList<>();
+        for (String groupId : groupIds) {
+            GroupBucketStatusDTO dto = getGroupBucketStatus(groupId);
+            if (dto != null) {
+                result.add(dto);
+            }
+        }
+        return result;
+    }
+}