절대 경로로 수정

frontend/components/dashboard/widgets/CustomMetricWidget.tsx

@@ -2,6 +2,7 @@
 
 import React, { useState, useEffect } from "react";
 import { DashboardElement } from "@/components/admin/dashboard/types";
+import { getApiUrl } from "@/lib/utils/apiUrl";
 
 interface CustomMetricWidgetProps {
   element?: DashboardElement;
@@ -79,7 +80,7 @@ export default function CustomMetricWidget({ element }: CustomMetricWidgetProps)
         }
 
         const token = localStorage.getItem("authToken");
-        const response = await fetch("/api/dashboards/execute-query", {
+        const response = await fetch(getApiUrl("/api/dashboards/execute-query"), {
           method: "POST",
           headers: {
             "Content-Type": "application/json",
@@ -121,7 +122,7 @@ export default function CustomMetricWidget({ element }: CustomMetricWidgetProps)
         }
 
         const token = localStorage.getItem("authToken");
-        const response = await fetch("/api/dashboards/fetch-external-api", {
+        const response = await fetch(getApiUrl("/api/dashboards/fetch-external-api"), {
           method: "POST",
           headers: {
             "Content-Type": "application/json",

frontend/lib/utils/apiUrl.ts

@@ -0,0 +1,24 @@
+/**
+ * API URL 유틸리티
+ * 프로덕션/개발 환경에 따라 올바른 API URL을 반환
+ */
+
+export function getApiUrl(endpoint: string): string {
+  // 클라이언트 사이드에서만 실행
+  if (typeof window !== "undefined") {
+    const hostname = window.location.hostname;
+
+    // 프로덕션: v1.vexplor.com → https://api.vexplor.com
+    if (hostname === "v1.vexplor.com") {
+      return `https://api.vexplor.com${endpoint}`;
+    }
+
+    // 로컬 개발: localhost → http://localhost:8080
+    if (hostname === "localhost" || hostname === "127.0.0.1") {
+      return `http://localhost:8080${endpoint}`;
+    }
+  }
+
+  // 기본값: 상대 경로
+  return endpoint;
+}