Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
MCPArea: what it touches
Internal ChangesKind: in v2.1.321,
Internal ChangesSection of the release
What
Some MCP servers, outside programs that give Claude extra tools, need you to sign in through OAuth, a standard sign-in flow. When Claude Code saves the sign-in details for such a server and the server's settings have no oauth.clientId, it now also saves the issuer: the identity of the sign-in server it found while setting up.
Why
This affects signing in again to MCP servers that do not name a client in their settings.
