Gateway

ANTHROPIC_BASE_URL and ANTHROPIC_AUTH_TOKEN

Claude Code still talks to Anthropic if the key sits in ANTHROPIC_API_KEY. Put the platform key in ANTHROPIC_AUTH_TOKEN and point ANTHROPIC_BASE_URL at zerouter.

Last updated 7 September 2026.

Create an API key Model catalog

Claude Code

ANTHROPIC_BASE_URL and ANTHROPIC_AUTH_TOKEN

Write ~/.claude/settings.json or export the two variables in your shell before launching claude.

~/.claude/settings.json

{
  "env": {
    "ANTHROPIC_BASE_URL": "https://api.zerouter.ai",
    "ANTHROPIC_AUTH_TOKEN": "sk-xxxx"
  }
}

Shell

export ANTHROPIC_BASE_URL="https://api.zerouter.ai"
export ANTHROPIC_AUTH_TOKEN="sk-xxxx"
claude

Host idle seats on the provider gateway