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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 v2.1.84 Home All releases ←olderv2.1.83 v2.1.85newer→

Claude Code v2.1.84 25 Mar 2026

API Request ID Tracking (`x-client-request-id`)

All API requests to Anthropic's first-party service now include an x-client-request-id header. When API errors occur, the request ID is surfaced in the error message ("give this to the API team for server-log lookup"), making it easier to debug issues with Anthropic support.

Evidence

Request ID tracking (search for "x-client-request-id", "API error x-client-request-id=")

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

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 v2.1.84 →

API Request ID Tracking (x-client-request-id)

Related

API Request ID Tracking (`x-client-request-id`)