You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
AuthArea: what it touches
ImprovementsKind: in v2.1.307,
ImprovementsSection of the release
Unclear It is not stated which setups the removed check used to exclude.
What
ANTHROPIC_BASE_URL points Claude Code at a different server, such as a proxy. ANTHROPIC_AUTH_TOKEN holds a value Claude Code sends to that server in the Authorization header to prove who you are. Claude Code sends that token when these conditions hold:
a provider check, which is unchanged
the server matches ANTHROPIC_BASE_URL
the token is valid
One extra check that could stop the token from being sent has been removed, and the token is no longer checked a second time.
Why
Some setups that did not send the token before may now send it to the custom server.
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtIt is not stated which setups the removed check used to exclude.
Anthropic's release notes agreeFixed the prompt-caching-scope beta header being sent behind custom ANTHROPIC_BASE_URL gateways and on Foundry, where it has no effect
