Source Intelligence

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

All of v2.1.224 Home All releases olderv2.1.223 v2.1.225newer

MCP OAuth discovery cache is re-validated against policy

You'll notice
Useful3 Signal2
MCP

Cached MCP OAuth details are rechecked against policy, so moved servers no longer authenticate stale.

What

Cached OAuth discovery details for MCP servers are now re-checked against policy before reuse and kept only for a fixed window. If the cached authorization server fails the check, stored credentials are invalidated and the cached entry is cleared instead of being reused, so a server that has moved or been disallowed no longer silently authenticates against a stale endpoint.

Evidence

Returning cached discovery state (authServer:

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.224 →