[codex] inherit site proxy settings for oauth (#296)

* test: define oauth proxy inheritance behavior

* feat: apply site proxy settings to oauth requests

* feat: backfill oauth provider sites at startup

* test: remove oauth site registry temp dir

src/server/index.ts

@@ -30,6 +30,7 @@ import { repairStoredCreatedAtValues } from './services/storedTimestampRepairSer
 import { migrateSiteApiKeysToAccounts } from './services/siteApiKeyMigrationService.js';
 import { ensureDefaultSitesSeeded } from './services/defaultSiteSeedService.js';
 import { ensureOauthIdentityBackfill } from './services/oauth/oauthIdentityBackfill.js';
+import { ensureOauthProviderSitesExist } from './services/oauth/oauthSiteRegistry.js';
 import { startOAuthLoopbackCallbackServers, stopOAuthLoopbackCallbackServers } from './services/oauth/localCallbackServer.js';
 import { startSiteAnnouncementPolling } from './services/siteAnnouncementPollingService.js';
 import { reloadBackupWebdavScheduler } from './services/backupService.js';
@@ -369,6 +370,8 @@ try {
   console.warn(`Failed to load runtime settings overrides: ${(error as Error)?.message || 'unknown error'}`);
 }
 
+await ensureOauthProviderSitesExist();
+
 const app = Fastify(buildFastifyOptions(config));
 
 await app.register(cors);

src/server/routes/api/oauth.test.ts

@@ -6,9 +6,21 @@ import { tmpdir } from 'node:os';
 import { join } from 'node:path';
 
 const fetchMock = vi.fn();
+const undiciAgentCtorMock = vi.fn();
+const undiciProxyAgentCtorMock = vi.fn();
 
 vi.mock('undici', () => ({
   fetch: (...args: unknown[]) => fetchMock(...args),
+  Agent: class MockUndiciAgent {
+    constructor(...args: unknown[]) {
+      undiciAgentCtorMock(...args);
+    }
+  },
+  ProxyAgent: class MockUndiciProxyAgent {
+    constructor(...args: unknown[]) {
+      undiciProxyAgentCtorMock(...args);
+    }
+  },
 }));
 
 type DbModule = typeof import('../../db/index.js');
@@ -51,13 +63,18 @@ describe('oauth routes', { timeout: 15_000 }, () => {
 
   beforeEach(async () => {
     fetchMock.mockReset();
+    undiciAgentCtorMock.mockReset();
+    undiciProxyAgentCtorMock.mockReset();
     await db.delete(schema.routeChannels).run();
     await db.delete(schema.tokenRoutes).run();
     await db.delete(schema.tokenModelAvailability).run();
     await db.delete(schema.modelAvailability).run();
     await db.delete(schema.accountTokens).run();
     await db.delete(schema.accounts).run();
+    await db.delete(schema.settings).run();
     await db.delete(schema.sites).run();
+    const { invalidateSiteProxyCache } = await import('../../services/siteProxy.js');
+    invalidateSiteProxyCache();
   });
 
   afterAll(async () => {
@@ -434,6 +451,74 @@ describe('oauth routes', { timeout: 15_000 }, () => {
     expect(modelNames.sort()).toEqual(['gpt-5', 'gpt-5.2-codex', 'gpt-5.4']);
   });
 
+  it('includes dispatcher for codex token exchange when oauth site enables the system proxy', async () => {
+    const jwt = buildJwt({
+      email: 'codex-proxy@example.com',
+      'https://api.openai.com/auth': {
+        chatgpt_account_id: 'chatgpt-account-proxy',
+        chatgpt_plan_type: 'plus',
+      },
+    });
+    await db.insert(schema.settings).values({
+      key: 'system_proxy_url',
+      value: JSON.stringify('http://127.0.0.1:7890'),
+    }).run();
+    await db.insert(schema.sites).values({
+      name: 'ChatGPT Codex OAuth',
+      url: 'https://chatgpt.com/backend-api/codex',
+      platform: 'codex',
+      status: 'active',
+      useSystemProxy: true,
+    }).run();
+
+    fetchMock
+      .mockResolvedValueOnce({
+        ok: true,
+        status: 200,
+        json: async () => ({
+          access_token: 'oauth-access-token',
+          refresh_token: 'oauth-refresh-token',
+          id_token: jwt,
+          expires_in: 3600,
+          token_type: 'Bearer',
+        }),
+        text: async () => JSON.stringify({ ok: true }),
+      })
+      .mockResolvedValueOnce({
+        ok: true,
+        status: 200,
+        json: async () => ({
+          models: [{ id: 'gpt-5.4' }],
+        }),
+        text: async () => JSON.stringify({ ok: true }),
+      });
+
+    const startResponse = await app.inject({
+      method: 'POST',
+      url: '/api/oauth/providers/codex/start',
+      headers: {
+        host: 'metapi.example',
+        'x-forwarded-proto': 'https',
+      },
+    });
+    expect(startResponse.statusCode).toBe(200);
+    const startBody = startResponse.json() as { state: string };
+
+    const callbackResponse = await app.inject({
+      method: 'POST',
+      url: `/api/oauth/sessions/${encodeURIComponent(startBody.state)}/manual-callback`,
+      payload: {
+        callbackUrl: `http://localhost:1455/auth/callback?state=${encodeURIComponent(startBody.state)}&code=oauth-code-proxy`,
+      },
+    });
+    expect(callbackResponse.statusCode).toBe(200);
+    const codexTokenCall = fetchMock.mock.calls.find((call) => String(call[0] || '') === 'https://auth.openai.com/oauth/token');
+    const codexTokenFetchInit = codexTokenCall?.[1] as Record<string, unknown> | undefined;
+    expect(codexTokenFetchInit).toEqual(expect.objectContaining({
+      dispatcher: expect.anything(),
+    }));
+  });
+
   it('marks oauth session as error and avoids creating a connection when manual codex callback model discovery fails', async () => {
     const jwt = buildJwt({
       email: 'codex-fail@example.com',

src/server/services/oauth/antigravityProvider.ts

@@ -1,4 +1,5 @@
 import { fetch } from 'undici';
+import { withExplicitProxyRequestInit } from '../siteProxy.js';
 import type { OAuthProviderDefinition } from './providers.js';
 
 export const ANTIGRAVITY_OAUTH_PROVIDER = 'antigravity';
@@ -110,10 +111,11 @@ async function callAntigravityInternalApi<T>(
   accessToken: string,
   method: 'loadCodeAssist' | 'onboardUser',
   body: Record<string, unknown>,
+  proxyUrl?: string | null,
 ): Promise<T | undefined> {
   const response = await fetch(
     `${ANTIGRAVITY_UPSTREAM_BASE_URL}/${ANTIGRAVITY_INTERNAL_API_VERSION}:${method}`,
-    {
+    withExplicitProxyRequestInit(proxyUrl, {
       method: 'POST',
       headers: {
         Authorization: `Bearer ${accessToken}`,
@@ -124,21 +126,24 @@ async function callAntigravityInternalApi<T>(
         'Client-Metadata': ANTIGRAVITY_CLIENT_METADATA,
       },
       body: JSON.stringify(body),
-    },
+    }),
   );
   if (!response.ok) return undefined;
   return response.json() as Promise<T>;
 }
 
-async function postAntigravityToken(body: URLSearchParams) {
+async function postAntigravityToken(
-  const response = await fetch(ANTIGRAVITY_TOKEN_URL, {
+  body: URLSearchParams,
+  proxyUrl?: string | null,
+) {
+  const response = await fetch(ANTIGRAVITY_TOKEN_URL, withExplicitProxyRequestInit(proxyUrl, {
     method: 'POST',
     headers: {
       'Content-Type': 'application/x-www-form-urlencoded',
       Accept: 'application/json',
     },
     body: body.toString(),
-  });
+  }));
   if (!response.ok) {
     const text = await response.text().catch(() => '');
     throw new Error(text || `antigravity token exchange failed with status ${response.status}`);
@@ -159,24 +164,31 @@ async function postAntigravityToken(body: URLSearchParams) {
   };
 }
 
-async function fetchAntigravityUserEmail(accessToken: string): Promise<string | undefined> {
+async function fetchAntigravityUserEmail(
-  const response = await fetch(ANTIGRAVITY_USERINFO_URL, {
+  accessToken: string,
+  proxyUrl?: string | null,
+): Promise<string | undefined> {
+  const response = await fetch(ANTIGRAVITY_USERINFO_URL, withExplicitProxyRequestInit(proxyUrl, {
     headers: {
       Authorization: `Bearer ${accessToken}`,
       Accept: 'application/json',
     },
-  });
+  }));
   if (!response.ok) return undefined;
   const payload = await response.json() as { email?: unknown };
   return asTrimmedString(payload.email);
 }
 
-async function fetchAntigravityProjectId(accessToken: string): Promise<string | undefined> {
+async function fetchAntigravityProjectId(
+  accessToken: string,
+  proxyUrl?: string | null,
+): Promise<string | undefined> {
   const metadata = buildAntigravityMetadata();
   const payload = await callAntigravityInternalApi<AntigravityLoadCodeAssistPayload>(
     accessToken,
     'loadCodeAssist',
     { metadata },
+    proxyUrl,
   );
   if (!payload) return undefined;
 
@@ -194,6 +206,7 @@ async function fetchAntigravityProjectId(accessToken: string): Promise<string |
         tierId,
         metadata,
       },
+      proxyUrl,
     );
     if (!onboardPayload) return undefined;
     if (onboardPayload.done === true) {
@@ -249,16 +262,16 @@ export const antigravityOauthProvider: OAuthProviderDefinition = {
     });
     return `${ANTIGRAVITY_AUTH_URL}?${params.toString()}`;
   },
-  exchangeAuthorizationCode: async ({ code, redirectUri }) => {
+  exchangeAuthorizationCode: async ({ code, redirectUri, proxyUrl }) => {
     const token = await postAntigravityToken(new URLSearchParams({
       code,
       client_id: ANTIGRAVITY_CLIENT_ID,
       client_secret: ANTIGRAVITY_CLIENT_SECRET,
       redirect_uri: redirectUri,
       grant_type: 'authorization_code',
-    }));
+    }), proxyUrl);
-    const email = await fetchAntigravityUserEmail(token.accessToken);
+    const email = await fetchAntigravityUserEmail(token.accessToken, proxyUrl);
-    const projectId = await fetchAntigravityProjectId(token.accessToken);
+    const projectId = await fetchAntigravityProjectId(token.accessToken, proxyUrl);
     return {
       ...token,
       email,
@@ -267,20 +280,20 @@ export const antigravityOauthProvider: OAuthProviderDefinition = {
       projectId,
     };
   },
-  refreshAccessToken: async ({ refreshToken, oauth }) => {
+  refreshAccessToken: async ({ refreshToken, oauth, proxyUrl }) => {
     const token = await postAntigravityToken(new URLSearchParams({
       client_id: ANTIGRAVITY_CLIENT_ID,
       client_secret: ANTIGRAVITY_CLIENT_SECRET,
       grant_type: 'refresh_token',
       refresh_token: refreshToken,
-    }));
+    }), proxyUrl);
-    const email = await fetchAntigravityUserEmail(token.accessToken);
+    const email = await fetchAntigravityUserEmail(token.accessToken, proxyUrl);
     return {
       ...token,
       email,
       accountKey: email,
       accountId: email,
-      projectId: oauth?.projectId ?? await fetchAntigravityProjectId(token.accessToken),
+      projectId: oauth?.projectId ?? await fetchAntigravityProjectId(token.accessToken, proxyUrl),
     };
   },
   buildProxyHeaders: () => ({

src/server/services/oauth/claudeProvider.ts

@@ -1,5 +1,6 @@
 import { fetch } from 'undici';
 import { config } from '../../config.js';
+import { withExplicitProxyRequestInit } from '../siteProxy.js';
 import { createPkceChallenge } from './sessionStore.js';
 import type { OAuthProviderDefinition } from './providers.js';
 
@@ -77,15 +78,18 @@ function parseClaudeTokenPayload(payload: unknown) {
   };
 }
 
-async function postClaudeToken(body: Record<string, unknown>) {
+async function postClaudeToken(
-  const response = await fetch(CLAUDE_TOKEN_URL, {
+  body: Record<string, unknown>,
+  proxyUrl?: string | null,
+) {
+  const response = await fetch(CLAUDE_TOKEN_URL, withExplicitProxyRequestInit(proxyUrl, {
     method: 'POST',
     headers: {
       'Content-Type': 'application/json',
       Accept: 'application/json',
     },
     body: JSON.stringify(body),
-  });
+  }));
   if (!response.ok) {
     const text = await response.text().catch(() => '');
     throw new Error(text || `claude token exchange failed with status ${response.status}`);
@@ -129,7 +133,7 @@ export const claudeOauthProvider: OAuthProviderDefinition = {
     });
     return `${CLAUDE_AUTH_URL}?${params.toString()}`;
   },
-  exchangeAuthorizationCode: async ({ code, state, redirectUri, codeVerifier }) => {
+  exchangeAuthorizationCode: async ({ code, state, redirectUri, codeVerifier, proxyUrl }) => {
     return postClaudeToken({
       code,
       state,
@@ -137,14 +141,14 @@ export const claudeOauthProvider: OAuthProviderDefinition = {
       client_id: requireClaudeClientId(),
       redirect_uri: redirectUri,
       code_verifier: codeVerifier,
-    });
+    }, proxyUrl);
   },
-  refreshAccessToken: async ({ refreshToken }) => {
+  refreshAccessToken: async ({ refreshToken, proxyUrl }) => {
     return postClaudeToken({
       client_id: requireClaudeClientId(),
       grant_type: 'refresh_token',
       refresh_token: refreshToken,
-    });
+    }, proxyUrl);
   },
   buildProxyHeaders: () => ({
     'anthropic-version': CLAUDE_DEFAULT_ANTHROPIC_VERSION,

src/server/services/oauth/codexProvider.ts

@@ -1,5 +1,6 @@
 import { fetch } from 'undici';
 import { config } from '../../config.js';
+import { withExplicitProxyRequestInit } from '../siteProxy.js';
 import { createPkceChallenge } from './sessionStore.js';
 import type { OAuthProviderDefinition } from './providers.js';
 
@@ -106,15 +107,18 @@ function parseTokenResponsePayload(payload: unknown): CodexTokenExchangeResult {
   };
 }
 
-async function exchangeCodexToken(form: URLSearchParams): Promise<CodexTokenExchangeResult> {
+async function exchangeCodexToken(
-  const response = await fetch(CODEX_TOKEN_URL, {
+  form: URLSearchParams,
+  proxyUrl?: string | null,
+): Promise<CodexTokenExchangeResult> {
+  const response = await fetch(CODEX_TOKEN_URL, withExplicitProxyRequestInit(proxyUrl, {
     method: 'POST',
     headers: {
       'Content-Type': 'application/x-www-form-urlencoded',
       Accept: 'application/json',
     },
     body: form.toString(),
-  });
+  }));
   if (!response.ok) {
     const text = await response.text().catch(() => '');
     throw new Error(text || `codex token exchange failed with status ${response.status}`);
@@ -126,6 +130,7 @@ export async function exchangeCodexAuthorizationCode(input: {
   code: string;
   codeVerifier: string;
   redirectUri: string;
+  proxyUrl?: string | null;
 }): Promise<CodexTokenExchangeResult> {
   return exchangeCodexToken(new URLSearchParams({
     grant_type: 'authorization_code',
@@ -133,16 +138,19 @@ export async function exchangeCodexAuthorizationCode(input: {
     code: input.code,
     redirect_uri: input.redirectUri,
     code_verifier: input.codeVerifier,
-  }));
+  }), input.proxyUrl);
 }
 
-export async function refreshCodexTokens(refreshToken: string): Promise<CodexTokenExchangeResult> {
+export async function refreshCodexTokens(
+  refreshToken: string,
+  proxyUrl?: string | null,
+): Promise<CodexTokenExchangeResult> {
   return exchangeCodexToken(new URLSearchParams({
     client_id: requireCodexClientId(),
     grant_type: 'refresh_token',
     refresh_token: refreshToken,
     scope: 'openid profile email',
-  }));
+  }), proxyUrl);
 }
 
 function getHeaderValue(headers: Record<string, unknown> | undefined, key: string): string | undefined {
@@ -193,11 +201,12 @@ export const codexOauthProvider: OAuthProviderDefinition = {
     redirectUri,
     codeVerifier,
   }),
-  exchangeAuthorizationCode: async ({ code, redirectUri, codeVerifier }) => {
+  exchangeAuthorizationCode: async ({ code, redirectUri, codeVerifier, proxyUrl }) => {
     const exchange = await exchangeCodexAuthorizationCode({
       code,
       redirectUri,
       codeVerifier,
+      proxyUrl,
     });
     return {
       accessToken: exchange.accessToken,
@@ -210,8 +219,8 @@ export const codexOauthProvider: OAuthProviderDefinition = {
       idToken: exchange.idToken,
     };
   },
-  refreshAccessToken: async ({ refreshToken }) => {
+  refreshAccessToken: async ({ refreshToken, proxyUrl }) => {
-    const refreshed = await refreshCodexTokens(refreshToken);
+    const refreshed = await refreshCodexTokens(refreshToken, proxyUrl);
     return {
       accessToken: refreshed.accessToken,
       refreshToken: refreshed.refreshToken,

src/server/services/oauth/geminiCliProvider.ts

@@ -1,5 +1,6 @@
 import { fetch } from 'undici';
 import { config } from '../../config.js';
+import { withExplicitProxyRequestInit } from '../siteProxy.js';
 import type { OAuthProviderDefinition } from './providers.js';
 
 export const GEMINI_CLI_OAUTH_PROVIDER = 'gemini-cli';
@@ -147,15 +148,18 @@ async function sleep(ms: number): Promise<void> {
   await new Promise((resolve) => setTimeout(resolve, ms));
 }
 
-async function postGeminiToken(body: URLSearchParams) {
+async function postGeminiToken(
-  const response = await fetch(GEMINI_CLI_TOKEN_URL, {
+  body: URLSearchParams,
+  proxyUrl?: string | null,
+) {
+  const response = await fetch(GEMINI_CLI_TOKEN_URL, withExplicitProxyRequestInit(proxyUrl, {
     method: 'POST',
     headers: {
       'Content-Type': 'application/x-www-form-urlencoded',
       Accept: 'application/json',
     },
     body: body.toString(),
-  });
+  }));
   if (!response.ok) {
     const text = await response.text().catch(() => '');
     throw new Error(text || `gemini token exchange failed with status ${response.status}`);
@@ -176,13 +180,16 @@ async function postGeminiToken(body: URLSearchParams) {
   };
 }
 
-async function fetchGeminiUserEmail(accessToken: string): Promise<string | undefined> {
+async function fetchGeminiUserEmail(
-  const response = await fetch(GEMINI_CLI_USERINFO_URL, {
+  accessToken: string,
+  proxyUrl?: string | null,
+): Promise<string | undefined> {
+  const response = await fetch(GEMINI_CLI_USERINFO_URL, withExplicitProxyRequestInit(proxyUrl, {
     headers: {
       Authorization: `Bearer ${accessToken}`,
       Accept: 'application/json',
     },
-  });
+  }));
   if (!response.ok) return undefined;
   const payload = await response.json() as { email?: unknown };
   return asTrimmedString(payload.email);
@@ -192,10 +199,11 @@ async function callGeminiCliInternalApi<T>(
   accessToken: string,
   method: 'loadCodeAssist' | 'onboardUser',
   body: Record<string, unknown>,
+  proxyUrl?: string | null,
 ): Promise<T> {
   const response = await fetch(
     `${GEMINI_CLI_UPSTREAM_BASE_URL}/${GEMINI_CLI_INTERNAL_API_VERSION}:${method}`,
-    {
+    withExplicitProxyRequestInit(proxyUrl, {
       method: 'POST',
       headers: {
         Authorization: `Bearer ${accessToken}`,
@@ -205,7 +213,7 @@ async function callGeminiCliInternalApi<T>(
         'X-Goog-Api-Client': GEMINI_CLI_GOOGLE_API_CLIENT,
       },
       body: JSON.stringify(body),
-    },
+    }),
   );
   if (!response.ok) {
     const text = await response.text().catch(() => '');
@@ -214,13 +222,13 @@ async function callGeminiCliInternalApi<T>(
   return response.json() as Promise<T>;
 }
 
-async function fetchGcpProjects(accessToken: string): Promise<string[]> {
+async function fetchGcpProjects(accessToken: string, proxyUrl?: string | null): Promise<string[]> {
-  const response = await fetch(GEMINI_CLI_PROJECTS_URL, {
+  const response = await fetch(GEMINI_CLI_PROJECTS_URL, withExplicitProxyRequestInit(proxyUrl, {
     headers: {
       Authorization: `Bearer ${accessToken}`,
       Accept: 'application/json',
     },
-  });
+  }));
   if (!response.ok) {
     const text = await response.text().catch(() => '');
     throw new Error(text || `project list request failed with status ${response.status}`);
@@ -231,17 +239,21 @@ async function fetchGcpProjects(accessToken: string): Promise<string[]> {
     .filter((projectId): projectId is string => !!projectId);
 }
 
-async function checkCloudAIAPIEnabled(accessToken: string, projectId: string): Promise<void> {
+async function checkCloudAIAPIEnabled(
+  accessToken: string,
+  projectId: string,
+  proxyUrl?: string | null,
+): Promise<void> {
   const checkResponse = await fetch(
     `${GEMINI_CLI_SERVICE_USAGE_URL}/projects/${encodeURIComponent(projectId)}/services/${encodeURIComponent(GEMINI_CLI_REQUIRED_SERVICE)}`,
-    {
+    withExplicitProxyRequestInit(proxyUrl, {
       headers: {
         Authorization: `Bearer ${accessToken}`,
         Accept: 'application/json',
         'User-Agent': GEMINI_CLI_USER_AGENT,
         'X-Goog-Api-Client': GEMINI_CLI_GOOGLE_API_CLIENT,
       },
-    },
+    }),
   );
   if (checkResponse.ok) {
     const payload = await checkResponse.json() as { state?: unknown };
@@ -253,7 +265,7 @@ async function checkCloudAIAPIEnabled(accessToken: string, projectId: string): P
 
   const response = await fetch(
     `${GEMINI_CLI_SERVICE_USAGE_URL}/projects/${encodeURIComponent(projectId)}/services/${encodeURIComponent(GEMINI_CLI_REQUIRED_SERVICE)}:enable`,
-    {
+    withExplicitProxyRequestInit(proxyUrl, {
       method: 'POST',
       headers: {
         Authorization: `Bearer ${accessToken}`,
@@ -263,7 +275,7 @@ async function checkCloudAIAPIEnabled(accessToken: string, projectId: string): P
         'X-Goog-Api-Client': GEMINI_CLI_GOOGLE_API_CLIENT,
       },
       body: '{}',
-    },
+    }),
   );
   const text = await response.text().catch(() => '');
   if (response.ok) {
@@ -278,6 +290,7 @@ async function checkCloudAIAPIEnabled(accessToken: string, projectId: string): P
 async function performGeminiCliSetup(
   accessToken: string,
   requestedProjectId: string,
+  proxyUrl?: string | null,
 ): Promise<string> {
   const trimmedRequest = requestedProjectId.trim();
   const explicitProject = !!trimmedRequest;
@@ -291,6 +304,7 @@ async function performGeminiCliSetup(
         cloudaicompanionProject: trimmedRequest,
       }
       : { metadata },
+    proxyUrl,
   );
 
   const tierId = extractGeminiDefaultTierId(loadResponse);
@@ -305,6 +319,7 @@ async function performGeminiCliSetup(
           tierId,
           metadata,
         },
+        proxyUrl,
       );
       if (onboardResponse.done === true) {
         const response = (
@@ -337,6 +352,7 @@ async function performGeminiCliSetup(
         metadata,
         cloudaicompanionProject: projectId,
       },
+      proxyUrl,
     );
     if (onboardResponse.done === true) {
       const response = (
@@ -372,18 +388,19 @@ async function performGeminiCliSetup(
 async function ensureGeminiProjectAndOnboard(
   accessToken: string,
   requestedProjectId?: string,
+  proxyUrl?: string | null,
 ): Promise<string> {
   const explicitProject = asTrimmedString(requestedProjectId);
   if (explicitProject) {
-    return performGeminiCliSetup(accessToken, explicitProject);
+    return performGeminiCliSetup(accessToken, explicitProject, proxyUrl);
   }
 
-  const projects = await fetchGcpProjects(accessToken);
+  const projects = await fetchGcpProjects(accessToken, proxyUrl);
   const firstProject = projects[0];
   if (!firstProject) {
     throw new Error('no Google Cloud projects available for this account');
   }
-  return performGeminiCliSetup(accessToken, firstProject);
+  return performGeminiCliSetup(accessToken, firstProject, proxyUrl);
 }
 
 export const geminiCliOauthProvider: OAuthProviderDefinition = {
@@ -422,7 +439,7 @@ export const geminiCliOauthProvider: OAuthProviderDefinition = {
     });
     return `${GEMINI_CLI_AUTH_URL}?${params.toString()}`;
   },
-  exchangeAuthorizationCode: async ({ code, redirectUri, projectId }) => {
+  exchangeAuthorizationCode: async ({ code, redirectUri, projectId, proxyUrl }) => {
     const oauthConfig = requireGeminiCliOAuthConfig();
     const token = await postGeminiToken(new URLSearchParams({
       code,
@@ -430,10 +447,10 @@ export const geminiCliOauthProvider: OAuthProviderDefinition = {
       client_secret: oauthConfig.clientSecret,
       redirect_uri: redirectUri,
       grant_type: 'authorization_code',
-    }));
+    }), proxyUrl);
-    const resolvedProjectId = await ensureGeminiProjectAndOnboard(token.accessToken, projectId);
+    const resolvedProjectId = await ensureGeminiProjectAndOnboard(token.accessToken, projectId, proxyUrl);
-    await checkCloudAIAPIEnabled(token.accessToken, resolvedProjectId);
+    await checkCloudAIAPIEnabled(token.accessToken, resolvedProjectId, proxyUrl);
-    const email = await fetchGeminiUserEmail(token.accessToken);
+    const email = await fetchGeminiUserEmail(token.accessToken, proxyUrl);
     return {
       ...token,
       email,
@@ -442,19 +459,19 @@ export const geminiCliOauthProvider: OAuthProviderDefinition = {
       projectId: resolvedProjectId,
     };
   },
-  refreshAccessToken: async ({ refreshToken, oauth }) => {
+  refreshAccessToken: async ({ refreshToken, oauth, proxyUrl }) => {
     const oauthConfig = requireGeminiCliOAuthConfig();
     const token = await postGeminiToken(new URLSearchParams({
       client_id: oauthConfig.clientId,
       client_secret: oauthConfig.clientSecret,
       grant_type: 'refresh_token',
       refresh_token: refreshToken,
-    }));
+    }), proxyUrl);
     const nextProjectId = oauth?.projectId
       ? oauth.projectId
-      : await ensureGeminiProjectAndOnboard(token.accessToken);
+      : await ensureGeminiProjectAndOnboard(token.accessToken, undefined, proxyUrl);
-    await checkCloudAIAPIEnabled(token.accessToken, nextProjectId);
+    await checkCloudAIAPIEnabled(token.accessToken, nextProjectId, proxyUrl);
-    const email = await fetchGeminiUserEmail(token.accessToken);
+    const email = await fetchGeminiUserEmail(token.accessToken, proxyUrl);
     return {
       ...token,
       email,

src/server/services/oauth/oauthSiteRegistry.test.ts

@@ -0,0 +1,51 @@
+import { afterAll, beforeAll, beforeEach, describe, expect, it } from 'vitest';
+import { mkdtempSync, rmSync } from 'node:fs';
+import { tmpdir } from 'node:os';
+import { join } from 'node:path';
+
+type DbModule = typeof import('../../db/index.js');
+
+describe('oauth site registry', () => {
+  let db: DbModule['db'];
+  let schema: DbModule['schema'];
+  let dataDir = '';
+
+  beforeAll(async () => {
+    dataDir = mkdtempSync(join(tmpdir(), 'metapi-oauth-site-registry-'));
+    process.env.DATA_DIR = dataDir;
+    await import('../../db/migrate.js');
+    const dbModule = await import('../../db/index.js');
+    db = dbModule.db;
+    schema = dbModule.schema;
+  });
+
+  beforeEach(async () => {
+    await db.delete(schema.sites).run();
+  });
+
+  afterAll(() => {
+    delete process.env.DATA_DIR;
+    if (dataDir) {
+      rmSync(dataDir, { recursive: true, force: true });
+    }
+  });
+
+  it('creates missing oauth provider sites without duplicating existing rows', async () => {
+    await db.insert(schema.sites).values({
+      name: 'Anthropic Claude OAuth',
+      url: 'https://api.anthropic.com',
+      platform: 'claude',
+      status: 'active',
+      useSystemProxy: true,
+    }).run();
+
+    const { ensureOauthProviderSitesExist } = await import('./oauthSiteRegistry.js');
+    await ensureOauthProviderSitesExist();
+
+    const rows = await db.select().from(schema.sites).all();
+    expect(rows.filter((row) => row.platform === 'codex')).toHaveLength(1);
+    expect(rows.filter((row) => row.platform === 'gemini-cli')).toHaveLength(1);
+    expect(rows.filter((row) => row.platform === 'antigravity')).toHaveLength(1);
+    expect(rows.filter((row) => row.platform === 'claude')).toHaveLength(1);
+  });
+});

src/server/services/oauth/oauthSiteRegistry.ts

@@ -0,0 +1,55 @@
+import { and, eq, sql } from 'drizzle-orm';
+import { db, schema } from '../../db/index.js';
+import { listOAuthProviderDefinitions, type OAuthProviderDefinition } from './providers.js';
+
+function isUniqueConstraintError(error: unknown): boolean {
+  if (!error) return false;
+  const message = error instanceof Error ? error.message : String(error);
+  const normalized = message.toLowerCase();
+  return normalized.includes('unique')
+    || normalized.includes('duplicate')
+    || normalized.includes('constraint failed');
+}
+
+async function getNextSiteSortOrder(): Promise<number> {
+  const row = await db.select({
+    maxSortOrder: sql<number>`COALESCE(MAX(${schema.sites.sortOrder}), -1)`,
+  }).from(schema.sites).get();
+  return (row?.maxSortOrder ?? -1) + 1;
+}
+
+export async function ensureOauthProviderSite(definition: OAuthProviderDefinition) {
+  const existing = await db.select().from(schema.sites).where(and(
+    eq(schema.sites.platform, definition.site.platform),
+    eq(schema.sites.url, definition.site.url),
+  )).get();
+  if (existing) return existing;
+
+  try {
+    return await db.insert(schema.sites).values({
+      name: definition.site.name,
+      url: definition.site.url,
+      platform: definition.site.platform,
+      status: 'active',
+      useSystemProxy: false,
+      isPinned: false,
+      globalWeight: 1,
+      sortOrder: await getNextSiteSortOrder(),
+    }).returning().get();
+  } catch (error) {
+    if (!isUniqueConstraintError(error)) throw error;
+    const recovered = await db.select().from(schema.sites).where(and(
+      eq(schema.sites.platform, definition.site.platform),
+      eq(schema.sites.url, definition.site.url),
+    )).get();
+    if (recovered) return recovered;
+    throw error;
+  }
+}
+
+export async function ensureOauthProviderSitesExist(): Promise<void> {
+  const definitions = listOAuthProviderDefinitions();
+  for (const definition of definitions) {
+    await ensureOauthProviderSite(definition);
+  }
+}

src/server/services/oauth/providers.ts

@@ -71,6 +71,7 @@ export interface OAuthProviderDefinition {
     redirectUri: string;
     codeVerifier: string;
     projectId?: string;
+    proxyUrl?: string | null;
   }): Promise<OAuthProviderExchangeResult>;
   refreshAccessToken(input: {
     refreshToken: string;
@@ -78,6 +79,7 @@ export interface OAuthProviderDefinition {
       projectId?: string;
       providerData?: Record<string, unknown>;
     };
+    proxyUrl?: string | null;
   }): Promise<OAuthProviderRefreshResult>;
   buildProxyHeaders?(input: OAuthProviderProxyHeaderInput): Record<string, string>;
 }

src/server/services/oauth/requestProxy.ts

@@ -0,0 +1,19 @@
+import { eq } from 'drizzle-orm';
+import { db, schema } from '../../db/index.js';
+import { getOAuthProviderDefinition } from './providers.js';
+import { resolveSiteProxyUrlByRequestUrl } from '../siteProxy.js';
+
+export async function resolveOauthProviderProxyUrl(provider: string): Promise<string | null> {
+  const definition = getOAuthProviderDefinition(provider);
+  if (!definition) return null;
+  return resolveSiteProxyUrlByRequestUrl(definition.site.url);
+}
+
+export async function resolveOauthAccountProxyUrl(siteId: number | null | undefined): Promise<string | null> {
+  if (!siteId || siteId <= 0) return null;
+  const site = await db.select({
+    url: schema.sites.url,
+  }).from(schema.sites).where(eq(schema.sites.id, siteId)).get();
+  if (!site?.url) return null;
+  return resolveSiteProxyUrlByRequestUrl(site.url);
+}

src/server/services/oauth/service.ts

@@ -15,6 +15,7 @@ import {
   listOAuthProviderDefinitions,
   type OAuthProviderDefinition,
 } from './providers.js';
+import { ensureOauthProviderSite } from './oauthSiteRegistry.js';
 import {
   buildOauthInfo,
   buildOauthInfoFromAccount,
@@ -28,6 +29,7 @@ import {
   type OauthExtraConfigInput,
   type OauthIdentityCarrierLike,
 } from './codexAccount.js';
+import { resolveOauthAccountProxyUrl, resolveOauthProviderProxyUrl } from './requestProxy.js';
 import { ensureOauthIdentityBackfill } from './oauthIdentityBackfill.js';
 import { buildQuotaSnapshotFromOauthInfo, refreshOauthQuotaSnapshot } from './quota.js';
 
@@ -140,30 +142,8 @@ async function getNextAccountSortOrder(): Promise<number> {
   return (row?.maxSortOrder ?? -1) + 1;
 }
 
-async function getNextSiteSortOrder(): Promise<number> {
-  const row = await db.select({
-    maxSortOrder: sql<number>`COALESCE(MAX(${schema.sites.sortOrder}), -1)`,
-  }).from(schema.sites).get();
-  return (row?.maxSortOrder ?? -1) + 1;
-}
-
 async function ensureOauthSite(definition: OAuthProviderDefinition) {
-  const existing = await db.select().from(schema.sites).where(and(
+  return ensureOauthProviderSite(definition);
-    eq(schema.sites.platform, definition.site.platform),
-    eq(schema.sites.url, definition.site.url),
-  )).get();
-  if (existing) return existing;
-
-  return db.insert(schema.sites).values({
-    name: definition.site.name,
-    url: definition.site.url,
-    platform: definition.site.platform,
-    status: 'active',
-    useSystemProxy: false,
-    isPinned: false,
-    globalWeight: 1,
-    sortOrder: await getNextSiteSortOrder(),
-  }).returning().get();
 }
 
 async function findExistingOauthAccount(input: {
@@ -375,12 +355,14 @@ export async function handleOauthCallback(input: {
   }
 
   try {
+    const proxyUrl = await resolveOauthProviderProxyUrl(input.provider);
     const exchange = await definition.exchangeAuthorizationCode({
       code,
       state: input.state,
       redirectUri: session.redirectUri,
       codeVerifier: session.codeVerifier,
       projectId: session.projectId,
+      proxyUrl,
     });
     const { account, site, created, previousAccount } = await upsertOauthAccount({
       definition,
@@ -655,6 +637,7 @@ export async function refreshOauthAccessToken(accountId: number) {
       projectId: oauth.projectId,
       providerData: oauth.providerData,
     },
+    proxyUrl: await resolveOauthAccountProxyUrl(account.siteId),
   });
   const nextOauth = buildOauthInfoFromAccount(account, {
     provider: oauth.provider,