Can't connect ChatGPT to instance-level MCP (RFC 7591 Dynamic Client Registration)

Questions
1

Describe the problem/error/question

I can’t connect my n8n instance when creating a custom connector on chatgpt.

I enabled MCP access and copied the OAuth URL but pasting and creating the connector in ChatGPT it errors out.

What is the error message (if any)?

Error creating connector

The server newn8n.iceatlas.xyz doesn’t support RFC 7591 Dynamic Client Registration

Information on your n8n setup

  • n8n version: 2.1.2
  • Running n8n via (Docker, npm, n8n cloud, desktop app): Coolify (Docker)
3

yeah this is a known limitation - n8n’s OAuth implementation doesnt support RFC 7591 dynamic client registration which ChatGPT needs to auto-create connectors. the workaround is to manually register your n8n instance as an OAuth app on your end first, then use those credentials in ChatGPT’s custom connector setup instead of relying on the auto-registration flow.

not the smoothest experience but thats the current state of it. lmk if you need help with the manual OAuth setup steps