diff --git a/src/cliproxy/quota-fetcher-gemini-cli.ts b/src/cliproxy/quota-fetcher-gemini-cli.ts
index 33aaec41..0ec6afef 100644
--- a/src/cliproxy/quota-fetcher-gemini-cli.ts
+++ b/src/cliproxy/quota-fetcher-gemini-cli.ts
@@ -639,6 +639,11 @@ async function fetchWithAuthData(
 
   const controller = new AbortController();
   const timeoutId = setTimeout(() => controller.abort(), 5000);
+  const supplementaryPromise = fetchGeminiCliSupplementary(
+    authData.accessToken,
+    authData.projectId,
+    verbose
+  );
 
   try {
     const response = await fetch(GEMINI_CLI_QUOTA_URL, {
@@ -668,11 +673,7 @@ async function fetchWithAuthData(
     const data = (await response.json()) as GeminiCliQuotaResponse;
     const rawBuckets = data.buckets || [];
     const buckets = buildGeminiCliBuckets(rawBuckets);
-    const supplementary = await fetchGeminiCliSupplementary(
-      authData.accessToken,
-      authData.projectId,
-      verbose
-    );
+    const supplementary = await supplementaryPromise;
 
     if (verbose) console.error(`[i] Gemini CLI buckets found: ${buckets.length}`);
 
diff --git a/tests/unit/cliproxy/quota-fetcher-gemini-cli.test.ts b/tests/unit/cliproxy/quota-fetcher-gemini-cli.test.ts
index 10574df0..8c2d1b18 100644
--- a/tests/unit/cliproxy/quota-fetcher-gemini-cli.test.ts
+++ b/tests/unit/cliproxy/quota-fetcher-gemini-cli.test.ts
@@ -448,6 +448,43 @@ describe('Gemini CLI Quota Fetcher', () => {
       expect(result.creditBalance).toBeNull();
       expect(result.buckets[0].remainingPercent).toBe(75);
     });
+
+    it('keeps base quota success when supplementary metadata throws a network error', async () => {
+      writeActiveGeminiAccount('supplementary-network@example.com');
+
+      mockFetch([
+        {
+          url: GEMINI_QUOTA_URL,
+          method: 'POST',
+          status: 200,
+          response: {
+            buckets: [{ model_id: 'gemini-3-flash-preview', remaining_fraction: 0.75 }],
+          },
+        },
+      ]);
+
+      const mockedFetch = globalThis.fetch;
+      globalThis.fetch = (async (input: RequestInfo | URL, init?: RequestInit) => {
+        const url =
+          typeof input === 'string' ? input : input instanceof URL ? input.href : input.url;
+        if (url === GEMINI_CODE_ASSIST_URL) {
+          throw new TypeError('supplementary network down');
+        }
+        return mockedFetch(input, init);
+      }) as typeof fetch;
+
+      try {
+        const result = await fetchGeminiCliQuota('supplementary-network@example.com');
+
+        expect(result.success).toBe(true);
+        expect(result.tierLabel).toBeNull();
+        expect(result.tierId).toBeNull();
+        expect(result.creditBalance).toBeNull();
+        expect(result.buckets[0].remainingPercent).toBe(75);
+      } finally {
+        globalThis.fetch = mockedFetch;
+      }
+    });
   });
 
   describe('fetchGeminiCliQuota failure metadata', () => {