Vercel MCP (ChatGPT) – 403 Forbidden on Team-Scoped API Requests Despite OWNER Access - Help

Title: Vercel MCP (ChatGPT) – 403 Forbidden on Team-Scoped API Requests Despite OWNER Access

Hello Vercel MCP Team,

I am reporting a persistent authorization issue with the Vercel MCP integration in ChatGPT.

Issue

Team: hansol-ksj
Team ID: team_xCmAI5nywckIpSIFtUsdPDPi
Team membership: OWNER
ChatGPT Vercel MCP: 403 Forbidden on team-scoped API requests
Vercel CLI: Successful access to the same team and API endpoint

Reproduction

Connect Vercel MCP to ChatGPT through OAuth.
List teams through MCP → returns teams: [].
Request GET /v2/teams/{teamId} → returns 403 Forbidden.
Retrieve a project with an explicit teamId → returns 403 Forbidden.
Retrieve the same project without teamId → succeeds.

Independent verification

Using Vercel CLI v59.11.1:

vercel teams list → Success
vercel --scope hansol-ksj project inspect hansol-rnd-insight-hub → Success
vercel api /v2/teams/team_xCmAI5nywckIpSIFtUsdPDPi --method GET → Success, membership role confirmed as OWNER

Troubleshooting completed

Reconnected and reauthorized the ChatGPT OAuth integration.
Verified that ChatGPT is listed under Settings → Sign in with Vercel.
Confirmed team ownership and successful API access through CLI.
Verified that the issue persists after reconnection.

Error message

Not authorized: Trying to access resource under scope "hansol-ksj". You must re-authenticate to this scope or use a token with access to this scope.

Request ID

hnd1:sfo1::jnrtc-1791596896980-257898cad

Request

Could the Vercel MCP engineering team investigate the OAuth team-scope handling for ChatGPT?

Specifically, why does the MCP integration return 403 for team-scoped requests while the same authenticated account can successfully access those resources through the Vercel CLI?

Please advise whether there is a known issue, workaround, or planned fix.

Thank you.