You'll noticeTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
MCPArea: what it touches
ImprovementsKind: in v2.1.315,
ImprovementsSection of the release
What
In an MCP server's sign-in settings, authServerMetadataUrl used to be checked only for being an https address. It is now also rejected if it is too long. Claude Code also has a new general address check that fails with "url is too long".
Why
MCP configurations with oversized addresses now fail with an error instead of being accepted.
