diff --git a/chatgpt-suno-tampermonkey.user.js b/chatgpt-suno-tampermonkey.user.js
index d70a80b..05125b3 100644
--- a/chatgpt-suno-tampermonkey.user.js
+++ b/chatgpt-suno-tampermonkey.user.js
@@ -1,7 +1,7 @@
 // ==UserScript==
 // @name         ChatGPT to Suno Prompt Copier
 // @namespace    local.suno-helper
-// @version      0.5.1
+// @version      0.5.2
 // @description  Copy structured ChatGPT song prompt versions into Suno fields.
 // @author       local
 // @match        https://chatgpt.com/*
@@ -978,6 +978,24 @@
     setStatus(statusTarget, `로컬 처리 시작: ${data.jobId || "job"} / ${data.log || "companion console 확인"}`);
   }
 
+  async function testCompanion(statusTarget) {
+    try {
+      const response = await fetch("http://127.0.0.1:17873/health", {
+        method: "GET",
+        cache: "no-store",
+      });
+      const text = await response.text();
+      if (!response.ok) {
+        setStatus(statusTarget, `연결 실패: ${response.status} ${response.statusText}`);
+        return;
+      }
+      const data = tryParseJson(text) || {};
+      setStatus(statusTarget, `연결 OK: ${data.outputRoot || "outputRoot 확인됨"}`);
+    } catch (error) {
+      setStatus(statusTarget, `연결 실패: companion을 켜고 새로고침해줘. ${error.message || error}`);
+    }
+  }
+
   async function bootSuno() {
     const body = createPanel("Suno Prompt Paste");
     const slots = await readSlots();
@@ -995,6 +1013,9 @@
       <div class="cgs-row">
         <button class="cgs-btn cgs-wide" type="button" data-cgs-scan-library>곡 감지</button>
       </div>
+      <div class="cgs-row">
+        <button class="cgs-btn cgs-wide" type="button" data-cgs-test-companion>연결 테스트</button>
+      </div>
       <div class="cgs-row">
         <button class="cgs-btn cgs-primary cgs-wide" type="button" data-cgs-process-library>WAV + 메타데이터 다운</button>
       </div>
@@ -1063,6 +1084,10 @@
         await exportSunoManifest(libraryTracks, body);
       }
     });
+
+    body.querySelector("[data-cgs-test-companion]").addEventListener("click", async () => {
+      await testCompanion(body);
+    });
   }
 
   function safeBootSuno() {