CLAUDE_CODE_USE_ANTHROPIC_AWS

Updated October 13, 2026 by Alex Sorokoletov

CLAUDE_CODE_USE_ANTHROPIC_AWS is a Claude Code environment variable: Selects "Claude Platform on AWS" as the API provider. Source code confirms this is a distinct provider alongside Bedrock, Vertex, and Foundry — the provider selection function returns "anthropicAws" when set, instantiating a dedicated AnthropicAws SDK client. Added in v2.1.90 and still present in v2.1.294. It is listed in the official reference.

How to set it

For one session, export it in the shell that starts Claude Code:

export CLAUDE_CODE_USE_ANTHROPIC_AWS=<value>
claude

To apply it to every session, add it to the env object of a settings file:

// ~/.claude/settings.json
{
  "env": {
    "CLAUDE_CODE_USE_ANTHROPIC_AWS": "<value>"
  }
}

Release notes that mention it

• Claude Code v2.1.96 — No New Environment Variables: Bedrock Auth Hotfix
• Claude Code v2.1.90 — 3 New Environment Variables: Anthropic AWS Provider, Marketplace Resilience, and /powerup Lessons
• Claude Code Version Tracker: Undocumented Env Vars, Feature Gates & Models

Related variables

• ANTHROPIC_AWS_API_KEY
• ANTHROPIC_AWS_BASE_URL
• ANTHROPIC_AWS_WORKSPACE_ID
• ANTHROPIC_SMALL_FAST_MODEL_AWS_REGION: AWS region for small fast model on Bedrock.
• CLAUDE_CODE_SKIP_ANTHROPIC_AWS_AUTH: Skips credential resolution for the Anthropic AWS provider.
• CLAUDE_CODE_USE_ANTHROPIC_GOOGLE_CLOUD: A new provider-backend toggle sitting in Claude Code's exact provider family — beside CLAUDE_CODE_USE_BEDROCK, USE_VERTEX, USE_FOUNDRY, USE_ANTHROPIC_AWS, USE_MANTLE, and USE_GATEWAY — and read by the same guard that suppresses error reporting under a managed provider.
• ANTHROPIC_BEDROCK_BASE_URL: Alternative Bedrock endpoint (alias).
• ANTHROPIC_BEDROCK_MANTLE_BASE_URL

Frequently asked questions

All variables, searchable: Claude Code environment variables.