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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 v2.1.222 Home All releases ←olderv2.1.221 v2.1.223newer→
Claude Code v2.1.222

claude.ai MCP proxy surfaces a rejected session token

You'll notice
Useful4 Signal0
MCP

When your claude.ai session token is rejected, you now get a clear error telling you to run /login.

/login
What

A 401 from the claude.ai proxy that a token refresh cannot fix now becomes a typed error telling you to run /login, instead of silently returning the original failed response.

Details
  • error code CLAUDEAI_BEARER_REJECTED, recognised by connect, tools/list, prompts/get and skills/list
  • sets discoveryBearerRejected on the client and skips the usual "degraded" telemetry
  • emits mcp_connect_claudeai_bearer_rejected and mcp_reconnect_bearer_rejected
  • the failed entry is evicted from the connection cache so a later attempt retries
Evidence

claude.ai rejected the session token — it may lack connector scopes or be invalid. Run /login.

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

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.222 →