Fails to authenticate in cursor

Edit: Seems "Dynamic client registration" needs to be toggled on, however it still doesn't authenticate

https://github.com/user-attachments/assets/97ae9c66-f8f9-4075-886e-0017533262ee

Hi, I've tried this is a variety of tools (e.g. Claude@0.12.55, Cursor@ 1.99.3) but can't get it to work.

I add some extra logging. Seems like the first issue is there is no handler for /.well-known/oauth-protected-resource. But adding that and returing protectedResourceHandlerClerk doesn't work either.

HTTP server running at http://localhost:3000
HTTPS server running at https://localhost:3001
request:  POST /mcp
mcpAuth: req.headers.authorization = undefined
await auth.getToken() = null
request:  GET /.well-known/oauth-protected-resource
ANY request received: /.well-known/oauth-protected-resource
request:  GET /.well-known/oauth-authorization-server
request:  GET /mcp
ANY request received: /mcp

Start by reproducing the failure with Cursor or Claude and trace the /mcp, /.well-known/oauth-protected-resource, and /.well-known/oauth-authorization-server requests shown in the issue. Inspect how the example handles these routes and Clerk authentication; done means the MCP client authenticates successfully without the missing-handler behavior.