diff --git a/frontend/src/api/bypassApi.ts b/frontend/src/api/bypassApi.ts
index 62ca2cc..29241e1 100644
--- a/frontend/src/api/bypassApi.ts
+++ b/frontend/src/api/bypassApi.ts
@@ -116,8 +116,15 @@ export const bypassApi = {
         deleteJson<ApiResponse<void>>(`${BASE}/${id}`),
     generateCode: (id: number, force = false) =>
         postJson<ApiResponse<CodeGenerationResult>>(`${BASE}/${id}/generate?force=${force}`),
-    parseJson: (jsonSample: string) =>
-        postJson<ApiResponse<BypassFieldDto[]>>(`${BASE}/parse-json`, jsonSample),
+    parseJson: async (jsonSample: string): Promise<ApiResponse<BypassFieldDto[]>> => {
+        const res = await fetch(`${BASE}/parse-json`, {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json' },
+            body: jsonSample, // 이미 JSON 문자열이므로 JSON.stringify 하지 않음
+        });
+        if (!res.ok) throw new Error(`API Error: ${res.status} ${res.statusText}`);
+        return res.json();
+    },
     getWebclientBeans: () =>
         fetchJson<ApiResponse<WebClientBeanInfo[]>>(`${BASE}/webclient-beans`),
 };