ANTHROPIC_AWS_WORKSPACE_ID
A Claude Code environment variable, read out of the shipped bundle. It has been in the build since v2.1.138, including the newest one read.
What it is
Required for [Claude Platform on AWS](/docs/en/claude-platform-on-aws). Sent on every request as the anthropic-workspace-id header
Anthropic's own wording. Read off Environment variables, captured 2026-08-28.
Presence across releases
| Releases | Reading | Declared type | Default |
|---|---|---|---|
| 2.1.245 – 2.1.250 5 releases | never mined | — | — |
| 2.1.160 – 2.1.243 75 releases | in the build | str | — |
| 2.1.138 – 2.1.159 20 releases | in the build | — | — |
A row reading never mined is a release with no archived bundle behind it. Nothing was read out of it, so nothing here says whether the name was in it. A declared type or a default is only ever what that release's own bundle stated.
Changelog entries naming it
No changelog entry here has ever named it. That is a statement about what has been written, not about the name: it has been in the build since v2.1.138 without anybody writing a line about it.
Documentation pages
- Environment variables reference table Claude Code CLI
- claude-platform-on-aws mentions it Claude Developer Platform
- csharp mentions it Claude Developer Platform
- go mentions it Claude Developer Platform
- java mentions it Claude Developer Platform
- php mentions it Claude Developer Platform
- For Amazon Bedrock support mentions it Claude Developer Platform
- Automatically handles tool execution loop mentions it Claude Developer Platform
- typescript mentions it Claude Developer Platform
- Quickstart mentions it Claude Code CLI
- Claude Code on Claude Platform on AWS mentions it Claude Code CLI
- Connect Claude Code to an LLM gateway mentions it Claude Code CLI
A reference table page is one whose own table defines this name, and it is where the description above came from. A page that mentions it carries the name somewhere in its text and may say nothing about it at all. Every page carrying it.
Names beside it
Every environment variable in the inventory starting anthropic_aws, up to twelve of them.
ANTHROPIC_AWS_API_KEYWorkspace API key for [Claude Platform on AWS](/docs/en/claude-platform-on-aws), generated in the AWS Console. Sent as x-api-key and takes precedence over AWS SigV4 2.1.138
ANTHROPIC_AWS_BASE_URLOverride the [Claude Platform on AWS](/docs/en/claude-platform-on-aws) endpoint URL. Use for custom regions or when routing through an [LLM gateway](/docs/en/llm-gateway). Defaults to https://aws-external-anthropic.{region}.api.aws. Claude Code resolves the region with the [same precedence as on Amazon Bedrock](/docs/en/amazon-bedrock#3-configure-claude-code) 2.1.138
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.