{"version":"2.1.307","anchor":"auth-token-forwarding-to-custom-anthropic-base-url-simplifie","canonical_anchor":"auth-token-forwarding-to-custom-anthropic-base-url-simplifie","heading":"Fewer conditions before ANTHROPIC_AUTH_TOKEN is sent to a custom address","tier":"notice","area":"Auth","scope":"both","heads_up":true,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.307\/e\/auth-token-forwarding-to-custom-anthropic-base-url-simplifie","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.307","markdown":"### Fewer conditions before `ANTHROPIC_AUTH_TOKEN` is sent to a custom address\n\nClaude Code dropped one check that could stop `ANTHROPIC_AUTH_TOKEN` from being sent to a matching `ANTHROPIC_BASE_URL`\n\n**Unclear.** It is not stated which setups the removed check used to exclude.\n\n**What**\n\n`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:\n\n- a provider check, which is unchanged\n\n- the server matches `ANTHROPIC_BASE_URL`\n\n- the token is valid\n\nOne extra check that could stop the token from being sent has been removed, and the token is no longer checked a second time.\n\n**Why**\n\nSome setups that did not send the token before may now send it to the custom server.\n\n- Area: Auth\n- Names: `ANTHROPIC_AUTH_TOKEN`, `ANTHROPIC_BASE_URL`\n- Tier: You'll notice\n- Useful: 2\/5\n- Signal: 1\/5\n- Scope: both\n- Heads-up: yes"}