diff --git a/src/main/resources/static/js/APIClient.js b/src/main/resources/static/js/APIClient.js
index 35ba671..ecfd7aa 100644
--- a/src/main/resources/static/js/APIClient.js
+++ b/src/main/resources/static/js/APIClient.js
@@ -9,44 +9,50 @@
 class APIClient {
     constructor() {
         window.globals = {};
-        this.globalVariables = window.globals;
         this.variables = {};
         this.abortController = null;
     }
 
-
     async sendAPIRequest(model, preProcessCallback, consoleOutput) {
-        // try {
-        const updatedModel = await this.executePreRequestScript(model, consoleOutput);
-        let processedRequest = this.replacePlaceholdersWithVariables(updatedModel);
-        if (preProcessCallback) {
-            preProcessCallback(processedRequest);
-        }
-        return this.makeAjaxRequest(processedRequest, model)
-            .then(async response => {
-                const responseData = await response.json(); // Parse the JSON response
-                if (!response.ok) {
-                    const errorMessage = responseData.error || 'Unknown error';
-                    throw new Error(`API 호출 중 오류가 발생했습니다. 사유[${errorMessage}]`);
-                }
-                return responseData;
-            })
-            .then(data => {
-                let response = {};
-                response.body = data.body;
-                response.status = data.status;
-                response.headers = {};
-                response.size = data.size;
-                _.forEach(data.headers, (header) => {
-                    response.headers[header.key] = header.value;
+        try {
+            const updatedModel = await this.executePreRequestScript(model, consoleOutput);
+            let processedRequest = this.replacePlaceholdersWithVariables(updatedModel);
+
+            if (preProcessCallback) {
+                preProcessCallback(processedRequest);
+            }
+            const response = await this.makeAjaxRequest(processedRequest, model, consoleOutput);
+            const responseData = await response.json(); // Parse the JSON response
+
+            if (!response.ok) {
+                const errorMessage = responseData.error || 'Unknown error';
+                throw new Error(`API 호출 중 오류가 발생했습니다. 사유[${errorMessage}]`);
+            }
+
+            const finalResponse = this.formatResponse(responseData);
+            return this.executePostRequestScript(model.postRequestScript, finalResponse, consoleOutput)
+                .catch(error => {
+                    $('.toast-body').text(error);
+                    $('.toast').toast('show');
+                    return finalResponse; // Return the original response even if there's an error in the post-request script
                 });
-                return this.executePostRequestScript(model.postRequestScript, response, consoleOutput)
-                    .catch(error => {
-                        $('.toast-body').text(error);
-                        $('.toast').toast('show');
-                        return response; // Return the original response even if there's an error
-                    });
-            });
+
+        } catch (error) {
+            throw error;
+        }
+    }
+
+    formatResponse(data) {
+        // Format response as needed before post-request script
+        let response = {};
+        response.body = data.body;
+        response.status = data.status;
+        response.headers = {};
+        response.size = data.size;
+        _.forEach(data.headers, (header) => {
+            response.headers[header.key] = header.value;
+        });
+        return response;
     }
 
     abort() {
@@ -60,15 +66,22 @@ class APIClient {
         this.abortController = new AbortController();
         const {signal} = this.abortController;
 
-        return fetch('/mgmt/api/test.do', {
-            method: 'POST',
-            headers: {
-                'Content-Type': 'application/json',
-                'X-XSRF-TOKEN': $('meta[name="_csrf"]').attr('content')
-            },
-            body: JSON.stringify(processedRequest),
-            signal: signal // pass the signal to the fetch
-        });
+        try {
+            return fetch('/mgmt/api/test.do', {
+                method: 'POST',
+                headers: {
+                    'Content-Type': 'application/json',
+                    'X-XSRF-TOKEN': $('meta[name="_csrf"]').attr('content')
+                },
+                body: JSON.stringify(processedRequest),
+                signal: signal // pass the signal to the fetch
+            });
+        } catch (error) {
+            if (error.name !== 'AbortError') {
+                console.error('Network request failed:', error);
+            }
+            throw error;
+        }
     }
 
 
@@ -76,7 +89,7 @@ class APIClient {
         let request = JSON.parse(JSON.stringify(original));
 
         let mergedVariables = {};
-        _.forEach(this.globalVariables, (value, key) => {
+        _.forEach(window.globals, (value, key) => {
             mergedVariables[key] = value;
         });