diff --git a/WebContent/jsp/onl/admin/rule/layoutManDetail.jsp b/WebContent/jsp/onl/admin/rule/layoutManDetail.jsp
index 8bcf3eb..4ab7166 100644
--- a/WebContent/jsp/onl/admin/rule/layoutManDetail.jsp
+++ b/WebContent/jsp/onl/admin/rule/layoutManDetail.jsp
@@ -375,10 +375,20 @@
                     url:url,
                     data:postData,
                     success:function(args){
-                        alert("<%=localeMessage.getString("common.saveMsg")%>");
                         if(isPop == "true"){
+                        	alert("<%=localeMessage.getString("common.saveMsg")%> \n저장 후 변환정보 수정이 필수입니다. 변환정보를 확인하세요");
+                            const origin = window.location.origin;
+
+                            const layoutName = $("input[name='loutName']").val();
+
+							parent.postMessage({
+								action: 'LAYOUT_SAVED_OPEN_TRANSFORM',
+					            layoutPartName: '${param.layoutPartName}'
+							}, origin);
+
                             window.close();
                         } else {
+                        	alert("<%=localeMessage.getString("common.saveMsg")%>");
                             goNav(returnUrl);
                         }
                     },
diff --git a/WebContent/jsp/onl/transaction/apim/apiInterfaceManDetail.jsp b/WebContent/jsp/onl/transaction/apim/apiInterfaceManDetail.jsp
index 4072679..f6ecc27 100644
--- a/WebContent/jsp/onl/transaction/apim/apiInterfaceManDetail.jsp
+++ b/WebContent/jsp/onl/transaction/apim/apiInterfaceManDetail.jsp
@@ -1153,19 +1153,46 @@
             addLayoutBtnEvent('outboundErrResponse', '아웃바운드 오류', 'TGTE');
 
             window.addEventListener('message', function(e) {
+                if (e.origin !== window.location.origin) return;
+
                 const popupMessage = e.data;
-                if('DELETE' == popupMessage.cmd){
-                    if('layout' == popupMessage.type){
-                        $('#'+popupMessage.layoutPartName).val('');
+                if (!popupMessage) return;
+
+                if ('DELETE' == popupMessage.cmd) {
+                    if ('layout' == popupMessage.type) {
+                        $('#' + popupMessage.layoutPartName).val('');
                     }
-                    if('transform' == popupMessage.type){
+                    if ('transform' == popupMessage.type) {
                         const partName = popupMessage.transformName.endsWith('REQ') ? '#requestTransform' : '#responseTransform';
                         $(partName).val('');
                     }
                     transformSetStateChange();
+                    return; 
+                }
+
+                // 레이아웃 저장 후 변환 팝업 자동 실행 로직
+                if (popupMessage.action === 'LAYOUT_SAVED_OPEN_TRANSFORM') {
+
+                    // 눈이 보이지않는 팝업창 popup창 닫기
+                    if ($('.ui-dialog-content').length > 0) {
+                        $('.ui-dialog-content').dialog('close');
+                    }
+
+                    const part = popupMessage.layoutPartName || "";
+                    
+                    setTimeout(function() {
+                        if (part.includes('Request')) {
+                            modifyTransform('request');
+                        } else if (part.includes('Response')) {
+                            modifyTransform('response');
+                        } else if (part.includes('ErrResponse')) {
+                            modifyTransform('errResponse');
+                        }
+                    }, 300);
                 }
             });
-
+            // modifyLayout('inboundRequestLayout', '인바운드 요청', 'CBSS')
+            
             $('#requestTransformButton').on("click", function(event) {
                 modifyTransform('request');
             });
@@ -1175,7 +1202,6 @@
             $('#errResponseTransformButton').on("click", function(event) {
                 modifyTransform('errResponse');
             });
-            // modifyLayout('inboundRequestLayout', '인바운드 요청', 'CBSS')
 
             // 함수 사용 예시에 인바운드 응답 처리 추가
             $("#fromAdapter").change(function() {
diff --git a/WebContent/jsp/onl/transaction/tracking/trackingManDetail.jsp b/WebContent/jsp/onl/transaction/tracking/trackingManDetail.jsp
index 0784b56..66bece0 100644
--- a/WebContent/jsp/onl/transaction/tracking/trackingManDetail.jsp
+++ b/WebContent/jsp/onl/transaction/tracking/trackingManDetail.jsp
@@ -15,6 +15,14 @@
 <jsp:include page="/jsp/common/include/css.jsp"/>
 <jsp:include page="/jsp/common/include/script.jsp"/>
 <style>
+
+#tab4 div {
+    display: block;
+    overflow-wrap: break-word;
+    word-break: break-all;
+    white-space: normal;
+}
+
 </style>
 <script language="javascript" >
     // var eaiBzwkDstcd   = window.dialogArguments["eaiBzwkDstcd"];
@@ -980,14 +988,14 @@ html,hbody {
 						<td style="width:30%;"><input type="text" name="msgDpstYMS" readonly="readonly"/> </td>
 					</tr>
 					<tr>
-						<th><%=localeMessage.getString("trackingDetail.eaiSvcName")%></th><td><input type="text" name="eaiSvcName" readonly="readonly" />
+						<th>API ID</th><td><input type="text" name="eaiSvcName" readonly="readonly" />
 <%-- 						<img src="<c:url value="/images/bt/pop_detail.gif"/>" alt="" id="eaiSvcName" class="eaiSvcName_btn" />  --%>
 <%--						<button type="button" class="cssbtn smallBtn2" id="eaiSvcName" style="vertical-align:middle; font-weight:bold;"><i class="material-icons">details</i><%= localeMessage.getString("button.detail") %></button>--%>
 						</td>
 						<th><%=localeMessage.getString("trackingDetail.msgPrcssYMS")%></th><td><input type="text" name="msgPrcssYMS" readonly="readonly"/> </td>
 					</tr>
 					<tr>
-						<th><%=localeMessage.getString("trackingDetail.eaiSvcDesc")%></th><td><input type="text" name="eaiSvcDesc" readonly="readonly"/> </td>
+						<th>API 명</th><td><input type="text" name="eaiSvcDesc" readonly="readonly"/> </td>
 						<th>ORG GUID</th><td><input type="text" name="pguid" readonly="readonly"/> </td>
 					</tr>
 					<tr>
diff --git a/src/main/java/com/eactive/eai/rms/data/entity/onl/apim/obp/ObpGwMetricService.java b/src/main/java/com/eactive/eai/rms/data/entity/onl/apim/obp/ObpGwMetricService.java
index da1d6ef..4c2b803 100644
--- a/src/main/java/com/eactive/eai/rms/data/entity/onl/apim/obp/ObpGwMetricService.java
+++ b/src/main/java/com/eactive/eai/rms/data/entity/onl/apim/obp/ObpGwMetricService.java
@@ -2,6 +2,9 @@ package com.eactive.eai.rms.data.entity.onl.apim.obp;
 
 import com.eactive.apim.portal.obp.entity.ObpGwMetric;
 import com.eactive.apim.portal.obp.repository.ObpGwMetricRepository;
+import org.springframework.data.domain.PageRequest;
+import org.springframework.data.domain.Pageable;
+import org.springframework.data.domain.Sort;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
@@ -50,6 +53,24 @@ public class ObpGwMetricService {
         return repository.findByTimesliceGreaterThanEqual(timeslice);
     }
 
+    /**
+     * 특정 시간대 이후의 GwMetric 데이터 조회 (row 수 제한)
+     *
+     * @param timeslice 조회 시작 시간대
+     * @param limit 최대 조회 건수 (0이면 무제한)
+     * @return 조회된 지표 목록 (timeslice ASC 정렬)
+     */
+    public List<ObpGwMetric> findByTimesliceGreaterThanEqual(LocalDateTime timeslice, int limit) {
+        if (limit <= 0) {
+            // 무제한 조회 (기존 동작 유지)
+            return repository.findByTimesliceGreaterThanEqual(timeslice);
+        } else {
+            // 제한적 조회 (timeslice ASC 정렬 + limit)
+            Pageable pageable = PageRequest.of(0, limit, Sort.by(Sort.Order.asc("timeslice")));
+            return repository.findByTimesliceGreaterThanEqual(timeslice, pageable);
+        }
+    }
+
     /**
      * 엔티티 저장 (INSERT 또는 UPDATE)
      */
diff --git a/src/main/java/com/eactive/eai/rms/onl/apim/obp/ObpGwMetricAfterDTO.java b/src/main/java/com/eactive/eai/rms/onl/apim/obp/ObpGwMetricAfterDTO.java
deleted file mode 100644
index af7feb1..0000000
--- a/src/main/java/com/eactive/eai/rms/onl/apim/obp/ObpGwMetricAfterDTO.java
+++ /dev/null
@@ -1,131 +0,0 @@
-package com.eactive.eai.rms.onl.apim.obp;
-
-import com.eactive.apim.portal.obp.entity.ObpGwMetric;
-import com.google.gson.annotations.SerializedName;
-import lombok.Data;
-
-import java.time.LocalDateTime;
-import java.time.format.DateTimeFormatter;
-
-/**
- * ObpGwMetric JSON 응답 DTO (after-timeslice 엔드포인트용)
- *
- * <p>예시 출력 형식에 맞춤:</p>
- * <pre>
- * {
- *   "apiId": "1ba56b82-a9c9-41e2-b3ab-ff9377667d56",
- *   "apiName": "[해외송금] 가상계좌 입금실패 정보조회",
- *   "apiRoutingUri": "/api/obs/remittance/remittancefail*",
- *   "httpMethod": "POST",
- *   "orgId": "ORG001",
- *   "partnerCode": "000008-01",
- *   "appId": "APP001",
- *   "appKey": "l7xx2fd7efc523794be5a1b126873a5de613",
- *   "requestUri": "-1",
- *   "timeslice": "2025-12-02T03:00:00.000+0000",
- *   "attemptedCount": 3,
- *   "completedCount": 3
- * }
- * </pre>
- */
-@Data
-public class ObpGwMetricAfterDTO {
-
-    private static final DateTimeFormatter ISO8601_MILLIS_FORMATTER =
-            DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSS'+0000'");
-
-    @SerializedName("apiId")
-    private String apiId;
-
-    @SerializedName("apiName")
-    private String apiName;
-
-    @SerializedName("apiRoutingUri")
-    private String apiRoutingUri;
-
-    @SerializedName("httpMethod")
-    private String httpMethod;
-
-    @SerializedName("orgId")
-    private String orgId;
-
-    @SerializedName("partnerCode")
-    private String partnerCode;
-
-    @SerializedName("appId")
-    private String appId;
-
-    @SerializedName("appKey")
-    private String appKey;
-
-    @SerializedName("requestUri")
-    private String requestUri;
-
-    @SerializedName("timeslice")
-    private String timeslice;
-
-    @SerializedName("attemptedCount")
-    private Long attemptedCount;
-
-    @SerializedName("completedCount")
-    private Long completedCount;
-
-
-    // AS-IS 호환을 위한 필드 (null 값으로 리턴)
-    @SerializedName("clusterHostname")
-    private String clusterHostname = null;
-
-    @SerializedName("apiDatabaseId")
-    private Integer apiDatabaseId = null;
-
-    @SerializedName("unauthorizedCount")
-    private Integer authorizedCount = null;
-
-    @SerializedName("backMinTime")
-    private Integer backMinTime = null;
-
-    @SerializedName("backMaxTime")
-    private Integer backMaxTime = null;
-
-    @SerializedName("backSumTime")
-    private Integer backSumTime = null;
-
-    @SerializedName("frontMinTime")
-    private Integer frontMinTime = null;
-
-    @SerializedName("frontMaxTime")
-    private Integer frontMaxTime = null;
-
-    @SerializedName("frontSumTime")
-    private Integer frontSumTime = null;
-
-
-    /**
-     * Entity → DTO 변환
-     */
-    public static ObpGwMetricAfterDTO from(ObpGwMetric entity) {
-        ObpGwMetricAfterDTO dto = new ObpGwMetricAfterDTO();
-        dto.setApiId(entity.getApiId());
-        dto.setApiName(entity.getApiName());
-        dto.setApiRoutingUri(entity.getUri());
-        dto.setHttpMethod(entity.getMethod());
-        dto.setOrgId(entity.getOrgId());
-        dto.setPartnerCode(entity.getPartnerCode());
-        dto.setAppId(entity.getAppId());
-        dto.setAppKey(entity.getClientId());
-        dto.setRequestUri(entity.getRequestUri());
-        dto.setTimeslice(formatTimeslice(entity.getTimeslice()));
-        dto.setAttemptedCount(entity.getAttemptedCount());
-        dto.setCompletedCount(entity.getCompletedCount());
-        return dto;
-    }
-
-    /**
-     * timeslice를 ISO8601 형식 (밀리초 포함) + UTC 시간대로 변환
-     * 예: 2025-12-02T03:00:00.000+0000
-     */
-    private static String formatTimeslice(LocalDateTime timeslice) {
-        if (timeslice == null) return null;
-        return timeslice.format(ISO8601_MILLIS_FORMATTER);
-    }
-}
diff --git a/src/main/java/com/eactive/eai/rms/onl/apim/obp/ObpGwMetricController.java b/src/main/java/com/eactive/eai/rms/onl/apim/obp/ObpGwMetricController.java
index 1e2dbdc..18a4f48 100644
--- a/src/main/java/com/eactive/eai/rms/onl/apim/obp/ObpGwMetricController.java
+++ b/src/main/java/com/eactive/eai/rms/onl/apim/obp/ObpGwMetricController.java
@@ -55,12 +55,12 @@ public class ObpGwMetricController extends BaseRestController {
         produces = JSON_CONTENT_TYPE
     )
     @ResponseBody
-    public String getGwMetricsAfterTimesliceV2(
+    public String getGwMetricsAfterTimeslice(
             @PathVariable("timeslice") String timeslice,
             @PathVariable("providerCode") String providerCode,
             @RequestParam(value = "pretty", required = false) Boolean pretty) {
 
-        log.debug("GwMetric after-timeslice 조회 요청 (v2): timeslice={}, providerCode={}, pretty={}",
+        log.debug("GwMetric after-timeslice 조회 요청: timeslice={}, providerCode={}, pretty={}",
                 timeslice, providerCode, pretty);
         long startTime = System.currentTimeMillis();
 
@@ -85,7 +85,7 @@ public class ObpGwMetricController extends BaseRestController {
                     DataSourceTypeManager.getDataSourceType(DataSourceTypeManager.MONITORING));
 
             // 5. 데이터 조회
-            List<ObpGwMetricAfterDTO> metrics = obpGwMetricManService.findByTimesliceAfter(timesliceHour);
+            List<ObpGwMetricDTO> metrics = obpGwMetricManService.findByTimesliceAfter(timesliceHour);
 
             // 6. JSON 변환
             String json = toJson(metrics, pretty);
@@ -104,90 +104,4 @@ public class ObpGwMetricController extends BaseRestController {
             throw new BizException("Failed to retrieve metrics: " + e.getMessage(), e);
         }
     }
-
-    /**
-     * 특정 시간대의 GwMetric 데이터 조회
-     *
-     * @param datetime 조회 시간대 (형식: yyyy-MM-dd_HH:mm:ss)
-     * @param pretty   true면 JSON 들여쓰기 적용
-     * @return JSON Array
-     */
-    @RequestMapping(
-            value = "/kjb/gw-metrics/{datetime}.json",
-            produces = JSON_CONTENT_TYPE
-    )
-    @ResponseBody
-    public String getGwMetrics(
-            @PathVariable("datetime") String datetime,
-            @RequestParam(value = "pretty", required = false) Boolean pretty) {
-        log.debug("GwMetric 조회 요청: datetime={}, pretty={}", datetime, pretty);
-        long startTime = System.currentTimeMillis();
-
-        try {
-            // Path 파라미터 파싱
-            LocalDateTime targetTime = LocalDateTime.parse(datetime, PATH_FORMATTER);
-            LocalDateTime timeslice = targetTime.withMinute(0).withSecond(0).withNano(0);
-
-            // 조회
-            List<ObpGwMetricDTO> metrics = obpGwMetricManService.findByTimeslice(timeslice);
-
-            // JSON 변환 (GSON)
-            String json = toJson(metrics, pretty);
-
-            long elapsed = System.currentTimeMillis() - startTime;
-            log.info("GwMetric 조회 완료: datetime={}, count={}, size={}, elapsed={}ms",
-                    datetime, metrics.size(), getFormattedJsonSize(json), elapsed);
-
-            return json;
-
-        } catch (Exception e) {
-            log.error("GwMetric 조회 실패: datetime={}", datetime, e);
-            throw e;
-        }
-    }
-
-    /**
-     * 특정 시간대 이후의 GwMetric 데이터 조회
-     *
-     * @param datetime 조회 시작 시간대 (형식: yyyy-MM-dd_HH:mm:ss)
-     * @param pretty   true면 JSON 들여쓰기 적용
-     * @return JSON Array (해당 시간대 이후의 모든 지표)
-     * @deprecated Use {@link #getGwMetricsAfterTimesliceV2(String, String, Boolean)} instead.
-     *             Migrate to /api/metrics/afterTimeslice/{timeslice}/{providerCode}
-     *             Will be removed in next major version.
-     */
-    @Deprecated
-    @RequestMapping(
-            value = "/kjb/gw-metrics/after-timeslice/{datetime}.json",
-            produces = JSON_CONTENT_TYPE
-    )
-    @ResponseBody
-    public String getGwMetricsAfterTimeslice(
-            @PathVariable("datetime") String datetime,
-            @RequestParam(value = "pretty", required = false) Boolean pretty) {
-        log.debug("GwMetric after-timeslice 조회 요청: datetime={}, pretty={}", datetime, pretty);
-        long startTime = System.currentTimeMillis();
-
-        try {
-            // Path 파라미터 파싱
-            LocalDateTime targetTime = LocalDateTime.parse(datetime, PATH_FORMATTER);
-            LocalDateTime timeslice = targetTime.withMinute(0).withSecond(0).withNano(0);
-
-            // 조회
-            List<ObpGwMetricAfterDTO> metrics = obpGwMetricManService.findByTimesliceAfter(timeslice);
-
-            // JSON 변환 (GSON)
-            String json = toJson(metrics, pretty);
-
-            long elapsed = System.currentTimeMillis() - startTime;
-            log.info("GwMetric after-timeslice 조회 완료: datetime={}, count={}, size={}, elapsed={}ms",
-                    datetime, metrics.size(), getFormattedJsonSize(json), elapsed);
-
-            return json;
-
-        } catch (Exception e) {
-            log.error("GwMetric after-timeslice 조회 실패: datetime={}", datetime, e);
-            throw e;
-        }
-    }
 }
diff --git a/src/main/java/com/eactive/eai/rms/onl/apim/obp/ObpGwMetricDTO.java b/src/main/java/com/eactive/eai/rms/onl/apim/obp/ObpGwMetricDTO.java
index c0d0a0a..976e678 100644
--- a/src/main/java/com/eactive/eai/rms/onl/apim/obp/ObpGwMetricDTO.java
+++ b/src/main/java/com/eactive/eai/rms/onl/apim/obp/ObpGwMetricDTO.java
@@ -8,32 +8,61 @@ import java.time.LocalDateTime;
 import java.time.format.DateTimeFormatter;
 
 /**
- * ObpGwMetric JSON 응답 DTO
- * Entity 주석에 명시된 JSON Key 사용
+ * ObpGwMetric JSON 응답 DTO (after-timeslice 엔드포인트용)
+ *
+ * <p>예시 출력 형식에 맞춤:</p>
+ * <pre>
+ * {
+ *   "apiId": "1ba56b82-a9c9-41e2-b3ab-ff9377667d56",
+ *   "apiName": "[해외송금] 가상계좌 입금실패 정보조회",
+ *   "apiRoutingUri": "/api/obs/remittance/remittancefail*",
+ *   "httpMethod": "POST",
+ *   "orgId": "ORG001",
+ *   "partnerCode": "000008-01",
+ *   "appId": "APP001",
+ *   "appKey": "l7xx2fd7efc523794be5a1b126873a5de613",
+ *   "requestUri": "-1",
+ *   "timeslice": "2025-12-02T03:00:00.000+0000",
+ *   "attemptedCount": 3,
+ *   "completedCount": 3
+ * }
+ * </pre>
  */
 @Data
 public class ObpGwMetricDTO {
 
-    private static final DateTimeFormatter ISO8601_FORMATTER =
-            DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss'+0000'");
+    private static final DateTimeFormatter ISO8601_MILLIS_FORMATTER =
+            DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSS'+0900'");
 
-    @SerializedName("appKey")
-    private String clientId;
-
-    @SerializedName("clusterHostname")
-    private String hostname;
-
-    @SerializedName("timeslice")
-    private String timeslice;
+    @SerializedName("apiId")
+    private String apiId;
 
     @SerializedName("apiName")
     private String apiName;
 
     @SerializedName("apiRoutingUri")
-    private String uri;
+    private String apiRoutingUri;
 
     @SerializedName("httpMethod")
-    private String method;
+    private String httpMethod;
+
+    @SerializedName("orgId")
+    private String orgId;
+
+    @SerializedName("partnerCode")
+    private String partnerCode;
+
+    @SerializedName("appId")
+    private String appId;
+
+    @SerializedName("appKey")
+    private String appKey;
+
+    @SerializedName("requestUri")
+    private String requestUri;
+
+    @SerializedName("timeslice")
+    private String timeslice;
 
     @SerializedName("attemptedCount")
     private Long attemptedCount;
@@ -41,62 +70,68 @@ public class ObpGwMetricDTO {
     @SerializedName("completedCount")
     private Long completedCount;
 
-    // EAPIM ID
-    @SerializedName("apiIdByEapim")
-    private String apiId;
 
-    @SerializedName("appIdByEapim")
-    private String appId;
+    // AS-IS 호환을 위한 필드 (null 값으로 리턴)
+    @SerializedName("clusterHostname")
+    private String clusterHostname = null;
 
-    @SerializedName("orgIdByEapim")
-    private String orgId;
+    @SerializedName("apiDatabaseId")
+    private Integer apiDatabaseId = null;
 
-    // AS-IS 호환용 필드
-    @SerializedName("appId")
-    private String appIdByCaPortal;
+    @SerializedName("unauthorizedCount")
+    private Integer authorizedCount = null;
 
-    @SerializedName("portalOrgId")
-    private String orgIdByCaPortal;
+    @SerializedName("backMinTime")
+    private Integer backMinTime = null;
 
-    @SerializedName("portalApiId")
-    private String apiIdByCaPortal;
+    @SerializedName("backMaxTime")
+    private Integer backMaxTime = null;
 
-    @SerializedName("partnerCode")
-    private String partnerCode;
+    @SerializedName("backSumTime")
+    private Integer backSumTime = null;
+
+    @SerializedName("frontMinTime")
+    private Integer frontMinTime = null;
+
+    @SerializedName("frontMaxTime")
+    private Integer frontMaxTime = null;
+
+    @SerializedName("frontSumTime")
+    private Integer frontSumTime = null;
 
-    @SerializedName("apiId")
-    private String apiIdByCa;
 
     /**
      * Entity → DTO 변환
      */
     public static ObpGwMetricDTO from(ObpGwMetric entity) {
         ObpGwMetricDTO dto = new ObpGwMetricDTO();
-        dto.setClientId(entity.getClientId());
-        dto.setHostname(entity.getHostname());
-        dto.setTimeslice(formatTimeslice(entity.getTimeslice()));
+        dto.setApiId(entity.getApiId());
         dto.setApiName(entity.getApiName());
-        dto.setUri(entity.getUri());
-        dto.setMethod(entity.getMethod());
+        dto.setApiRoutingUri(entity.getUri());
+        dto.setHttpMethod(entity.getMethod());
+        dto.setOrgId(entity.getOrgId());
+        dto.setPartnerCode(entity.getPartnerCode());
+        dto.setAppId(entity.getAppId());
+        dto.setAppKey(entity.getClientId());
+        dto.setRequestUri(entity.getRequestUri());
+        dto.setTimeslice(formatTimeslice(entity.getTimeslice()));
         dto.setAttemptedCount(entity.getAttemptedCount());
         dto.setCompletedCount(entity.getCompletedCount());
-        dto.setApiId(entity.getApiId());
-        dto.setAppId(entity.getAppId());
-        dto.setOrgId(entity.getOrgId());
-        dto.setAppIdByCaPortal(entity.getAppIdByCaPortal());
-        dto.setOrgIdByCaPortal(entity.getOrgIdByCaPortal());
-        dto.setApiIdByCaPortal(entity.getApiIdByCaPortal());
-        dto.setPartnerCode(entity.getPartnerCode());
-        dto.setApiIdByCa(entity.getApiIdByCa());
+
+
+        // 260224 - AS-IS 개발자포탈에서 쓰이던 ID 필드 값 삭제(OBP 디비 필드 형식과 맞지 않음)
+        dto.setOrgId(null);
+        dto.setAppId(null);
+
         return dto;
     }
 
     /**
-     * timeslice를 ISO8601 형식 + UTC 시간대로 변환
-     * 예: 2025-12-02T01:00:00+0000
+     * timeslice를 ISO8601 형식 (밀리초 포함) + UTC 시간대로 변환
+     * 예: 2025-12-02T03:00:00.000+0000
      */
     private static String formatTimeslice(LocalDateTime timeslice) {
         if (timeslice == null) return null;
-        return timeslice.format(ISO8601_FORMATTER);
+        return timeslice.format(ISO8601_MILLIS_FORMATTER);
     }
 }
diff --git a/src/main/java/com/eactive/eai/rms/onl/apim/obp/ObpGwMetricManService.java b/src/main/java/com/eactive/eai/rms/onl/apim/obp/ObpGwMetricManService.java
index 814f13c..a815b2c 100644
--- a/src/main/java/com/eactive/eai/rms/onl/apim/obp/ObpGwMetricManService.java
+++ b/src/main/java/com/eactive/eai/rms/onl/apim/obp/ObpGwMetricManService.java
@@ -10,6 +10,7 @@ import com.eactive.eai.rms.common.util.CommonUtil;
 import com.eactive.eai.rms.data.entity.onl.apim.obp.ObpGwMetricJpaDAO;
 import com.eactive.eai.rms.data.entity.onl.apim.obp.ObpGwMetricService;
 import com.eactive.eai.rms.data.entity.onl.apim.obp.ObpGwMetricVO;
+import com.eactive.ext.kjb.common.KjbPropertyHolder;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.dao.DataIntegrityViolationException;
@@ -311,30 +312,32 @@ public class ObpGwMetricManService extends BaseService {
         return entity;
     }
 
-    /**
-     * 특정 시간대의 GwMetric 데이터 조회 (REST API용)
-     */
-    public List<ObpGwMetricDTO> findByTimeslice(LocalDateTime timeslice) {
-        DataSourceContextHolder.setDataSourceType(
-                DataSourceTypeManager.getDataSourceType(DataSourceTypeManager.MONITORING));
-
-        List<ObpGwMetric> entities = obpGwMetricService.findByTimeslice(timeslice);
-        return entities.stream()
-                .map(ObpGwMetricDTO::from)
-                .collect(Collectors.toList());
-    }
-
     /**
      * 특정 시간대 이후의 GwMetric 데이터 조회 (REST API용)
      * after-timeslice 엔드포인트에서 사용
+     *
+     * <p>조회 범위 제한:</p>
+     * <ul>
+     *   <li>pageSize 값을 KjbProperty.apiGwMetricPageSize에서 읽어옴 (기본값: 10000)</li>
+     *   <li>0일 경우 무제한 조회</li>
+     *   <li>정렬: timeslice ASC (오래된 데이터부터 반환)</li>
+     * </ul>
      */
-    public List<ObpGwMetricAfterDTO> findByTimesliceAfter(LocalDateTime timeslice) {
+    public List<ObpGwMetricDTO> findByTimesliceAfter(LocalDateTime timeslice) {
         DataSourceContextHolder.setDataSourceType(
                 DataSourceTypeManager.getDataSourceType(DataSourceTypeManager.MONITORING));
 
-        List<ObpGwMetric> entities = obpGwMetricService.findByTimesliceGreaterThanEqual(timeslice);
+        // KjbProperty에서 pageSize 읽기
+        Integer pageSize = KjbPropertyHolder.get().getApiGwMetricPageSize();
+        if (pageSize == null) {
+            pageSize = 10000; // 기본값 (null 안전 처리)
+        }
+
+        // Service 호출 (limit 적용)
+        List<ObpGwMetric> entities = obpGwMetricService.findByTimesliceGreaterThanEqual(timeslice, pageSize);
+
         return entities.stream()
-                .map(ObpGwMetricAfterDTO::from)
+                .map(ObpGwMetricDTO::from)
                 .collect(Collectors.toList());
     }