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)
2

Hey @Akkad

The error happens because n8n’s OAuth doesn’t support RFC 7591 dynamic client registration, which ChatGPT requires to auto create a connector.

What you can do is Manually create an OAuth client in n8n and use its client ID when setting up the ChatGPT connector.