Your account was authorized, but Vercel returned an error when connecting. You can try again, or check that the server is working. If this persists, share this reference with support: “ofid_4ad71c4e336ad9ac”

Issue: Claude connection to Vercel MCP fails after authorization Error:

“Your account was authorized, but Vercel returned an error when connecting.”

Reference: ofid_1327e146fbe4113b

Endpoint: https://mcp.vercel.com returns 500

Team: markussullivan-hues-projects

Time: 2026-08-13 around 09:13–09:19 UTC

Client: Claude (please investigate the OAuth/MCP connection finalization failure)