A Claude Code environment variable, read out of the shipped bundle.
It has been in the build since v2.1.208, including the newest one read.
Set to 1 to skip the check that an Amazon Bedrock streaming response carries the application/vnd.amazon.eventstream content-type. Without this variable, when a response carries a different content-type, Claude Code fails the request with an error naming that type, which means a gateway or proxy is transforming the response. Configure the gateway to forward the Content-Type header and body unmodified rather than setting this variable. Requires Claude Code v2.1.208 or later
The earliest release whose published evidence quoted CLAUDE_CODE_DISABLE_BEDROCK_CONTENT_TYPE_GUARD was v2.1.285, 29 Sep 2026. That is the oldest release this project wrote about it, so it is a floor on the name's age and not the release that introduced it. It is not a presence reading: which builds carried the name is the table below.
v2.1.208 – v2.1.30990 builds13 Jul 2026 → 22 Oct 2026 ◆in the build
Build by build
90
One row per release since the first build this name was read out of. Absent means the build was read and the name was not in it, never mined means no bundle for that release was ever archived, and a declared type or a default is only ever what that release's own bundle stated.
v2.1.29914 Oct 2026·presentverdict: present · bool
v2.1.30014 Oct 2026·presentverdict: present · bool
v2.1.30115 Oct 2026·presentverdict: present · bool
v2.1.30216 Oct 2026·presentverdict: present · bool
v2.1.30318 Oct 2026·presentverdict: present · bool
v2.1.30419 Oct 2026·presentverdict: present · bool
v2.1.30520 Oct 2026·presentverdict: present · bool
v2.1.30621 Oct 2026·presentverdict: present · bool
v2.1.30721 Oct 2026·presentverdict: present · bool
v2.1.30822 Oct 2026·presentverdict: present · bool
v2.1.30922 Oct 2026·presentverdict: present · bool
Read out of the published npm bundle release by release, and out of Anthropic's own documentation as this site captured it. Nothing on this page is a description anybody here wrote about what the environment variable does. All environment variables.
