Building Custom Connectors via Remote MCP Servers | Claude Help Center
Auth Support
- Claude supports the 3/26 auth spec and (as of July) the 6/18 auth spec.
- Claude supports Dynamic Client Registration (DCR).
- OAuth servers can signal to Claude that a DCR client has been deleted and that Claude should re-register the client by returning an HTTP 401 with an error of invalid_client from the token endpoint, as described in RF