In ChatGPT developer mode I’m using the New App beta feature. I’m specifying the MCP url and select the OAuth option for authentication. I have the authentication flow set up on our servers, such as sending a 401 error with an WWW-Authenticate header. Our logs show that the .well-known end points relevant for MCP authentication are called, but the flow never gets to the registration part.
When I inspect the browser running the ChatGPT client I see a 404 error on this url:
That seems to indicate a problem in chatgpt, is that right? Is this a known problem?