Subject: Vercel MCP OAuth redirect URI issue with Cursor ("The app redirect URL is invalid")
Hi Vercel Support,
I'm unable to connect Vercel MCP in Cursor because OAuth fails on Vercel's authorize page with:
"App configuration error The app redirect URL is invalid"
This happens consistently before the callback returns to Cursor.
Request details:
- Authorize endpoint: https://vercel.com/oauth/authorize
- client_id: cl_KcWL599JrCOhI4n2lXPJJ8rkF4SqSbOf
- redirect_uri used: cursor://anysphere.cursor-mcp/oauth/callback
- resource: https://mcp.vercel.com
- scope: openid offline_access
- prompt: consent
Environment:
- OS: Windows 10 (10.0.19045)
- Cursor version: 3.2.11
- Browser: Chrome
Steps to reproduce:
- Add Vercel MCP in Cursor (via Add to Cursor or manual mcp.json)
- Click "Needs login" in Cursor
- Browser opens Vercel OAuth authorize URL
- Vercel page shows "The app redirect URL is invalid"
What I already tried:
- Fully restarting Cursor (including tray quit)
- Reload Window
- Removing/re-adding Vercel MCP
- Manual MCP config in .cursor/mcp.json: { "mcpServers": { "vercel": { "url": "https://mcp.vercel.com" } } }
- Retrying multiple times
Could you please verify that this redirect URI is whitelisted for the Vercel MCP OAuth client (client_id above)?
- cursor://anysphere.cursor-mcp/oauth/callback
If this needs a provider-side OAuth client update, please apply and let me know once deployed.
Thank you.