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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.

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Claude Code v2.1.228

Gateway answers 503 when customer-routed inference keys are unavailable

Not switched on
Useful2 Signal3
Gateway not in their notes

If key material can't be fetched, the gateway answers 503 with a retry hint instead of an auth error.

Only reachable with cri.enabled true, which defaults to false.

cri.enabled
What

With cri.enabled on, a bearer token routed through the customer-routed authenticator whose verification key material cannot be fetched now gets a 503 and a Retry-After: 30 header, rather than being reported as an authentication failure.

Evidence

customer-routed inference is temporarily unavailable: the gateway cannot obtain current verification keys

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 v2.1.228 →