You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
MCPArea: what it touches
ImprovementsKind: in v2.1.265,
ImprovementsSection of the release
What
When Claude Code connects to an MCP (Model Context Protocol) server that uses OAuth login, it now checks the server's discovery metadata for a registration_endpoint or support for client_id_metadata_document_supported. If either is present, a new registrationOfferedByDiscovery flag is set, and if there's no access or refresh token yet, Claude Code defers registering itself as a client until the actual authentication step instead of trying to register right away.
Why
Previously, missing client info could fail immediately; now, if the server's discovery data already offers a way to register, Claude Code waits and lets registration happen at authentication time instead of failing early.
