diff --git a/apps/api/app/services/provider_oauth.py b/apps/api/app/services/provider_oauth.py
index a7b32d9..9ceae97 100644
--- a/apps/api/app/services/provider_oauth.py
+++ b/apps/api/app/services/provider_oauth.py
@@ -69,7 +69,13 @@ _AGY_OAUTH = {
     "redirect_uri": "http://localhost:1455/auth/callback",
     "client_id": "1071006060591-tmhssin2h21lcre235vtolojh4g403ep.apps.googleusercontent.com",
     "client_secret": "GOCSPX-K58FWR486LdLJ1mLB8sXC4zqDAf",
-    "scope": "auth/cloud-platform auth/userinfo.email auth/userinfo.profile auth/cclog auth/experimentsandconfigs",
+    "scope": (
+        "https://www.googleapis.com/auth/cloud-platform "
+        "https://www.googleapis.com/auth/userinfo.email "
+        "https://www.googleapis.com/auth/userinfo.profile "
+        "https://www.googleapis.com/auth/cclog "
+        "https://www.googleapis.com/auth/experimentsandconfigs"
+    ),
     "user_agent": "antigravity/cli/1.0.0 (aidev_client; os_type=windows; arch=amd64; auth_method=consumer)",
     "code_assist_base": "https://cloudcode-pa.googleapis.com",
 }
diff --git a/apps/api/app/test_provider_oauth.py b/apps/api/app/test_provider_oauth.py
index 8401c32..c6ee527 100644
--- a/apps/api/app/test_provider_oauth.py
+++ b/apps/api/app/test_provider_oauth.py
@@ -63,6 +63,21 @@ class StartOAuthTest(unittest.TestCase):
         self.assertIn("code_challenge_method=S256", result["authorize_url"])
         self.assertNotIn("callback_url", result["authorize_url"])
 
+    def test_agy_authorize_url_uses_absolute_scope_urls(self):
+        # 구글은 축약형(auth/...) 스코프를 인식하지 못해 invalid_scope로 거부한다.
+        result = svc.start_oauth("agy", "admin@example.com")
+        authorize_url = result["authorize_url"]
+        self.assertIn("https://accounts.google.com/o/oauth2/v2/auth?", authorize_url)
+        for scope in (
+            "cloud-platform",
+            "userinfo.email",
+            "userinfo.profile",
+            "cclog",
+            "experimentsandconfigs",
+        ):
+            self.assertIn(f"https://www.googleapis.com/auth/{scope}", authorize_url)
+        self.assertNotIn("scope=auth/", authorize_url)
+
     def test_pending_expires(self):
         import time