Integration · Anthropic

Run Claude Code on the Crazyrouter API

One command writes the three environment variables Claude Code needs. Native Anthropic protocol, so streaming, tools, thinking and prompt caching behave exactly as they do against Anthropic — billed per token at Crazyrouter rates.

Get an API keyGitHub

One-command setup

Claude Code reads ANTHROPIC_BASE_URL and ANTHROPIC_AUTH_TOKEN at startup. Set them to Crazyrouter and every session, sub-agent and hook call goes through your Crazyrouter key. The scripts below are the same ones published in the GitHub repo; nothing is installed beyond Claude Code itself.

  1. 1Run the command

    Pulls the script from GitHub; nothing else is downloaded.

  2. 2Paste your Crazyrouter key

    Pick a default model when asked; you can change it later.

  3. 3Tool talks to Crazyrouter

    Config or env vars are written; the next launch routes through your key.

macOS / Linux
curl -fsSL https://raw.githubusercontent.com/xujfcn/crazyrouter-claude-code/main/configure.sh | bash
Windows PowerShell
irm https://raw.githubusercontent.com/xujfcn/crazyrouter-claude-code/main/windows/configure.ps1 | iex
What the script does
  • Asks for your Crazyrouter API key and a default model
  • Writes ANTHROPIC_BASE_URL / ANTHROPIC_AUTH_TOKEN / ANTHROPIC_MODEL as user-level environment variables
  • Also sets OPENAI_API_KEY / OPENAI_BASE_URL so the same key works in OpenAI-compatible tools
  • Use setup.sh / setup.ps1 instead on a fresh machine: it installs Node.js and Claude Code first

Scripts are fetched from the public GitHub repo linked below. Read them before piping to a shell if that's your policy; the download-then-run form is in the README.

Manual configuration

macOS / Linux — ~/.zshrc or ~/.bashrc

bash
export ANTHROPIC_BASE_URL="https://api.crazyrouter.com"
export ANTHROPIC_AUTH_TOKEN="sk-your-crazyrouter-key"
export ANTHROPIC_MODEL="claude-opus-4-8"

Root domain only — Claude Code appends /v1/messages itself. Do not add /v1.

Windows PowerShell (persistent)

powershell
[Environment]::SetEnvironmentVariable('ANTHROPIC_BASE_URL', 'https://api.crazyrouter.com', 'User')
[Environment]::SetEnvironmentVariable('ANTHROPIC_AUTH_TOKEN', 'sk-your-crazyrouter-key', 'User')
[Environment]::SetEnvironmentVariable('ANTHROPIC_MODEL', 'claude-opus-4-8', 'User')

Or per-project — .claude/settings.json

json
{
  "env": {
    "ANTHROPIC_BASE_URL": "https://api.crazyrouter.com",
    "ANTHROPIC_AUTH_TOKEN": "sk-your-crazyrouter-key",
    "ANTHROPIC_MODEL": "claude-opus-4-8"
  }
}
Base URL rule

https://api.crazyrouter.com — This tool speaks a vendor-native protocol and appends its own path. Use the root domain exactly as shown — no /v1.

Recommended models

Live Crazyrouter prices, refreshed hourly. Any model in the catalogue works; these are the ones we'd start with.

Claude Opus 4.8
claude-opus-4-8
$3.25 in · $16.25 out /1M tokens
Claude Sonnet 4.6
claude-sonnet-4-6
$1.95 in · $9.75 out /1M tokens
Claude Opus 5
claude-opus-5
$3.25 in · $16.25 out /1M tokens

FAQ

Do I need an Anthropic account?

No. Your Crazyrouter key replaces the Anthropic key; Claude Code never contacts api.anthropic.com.

Which base URL do I use?

https://api.crazyrouter.com — the root domain with no path. Claude Code appends /v1/messages itself; adding /v1 causes 404s.

Does /login or OAuth still work?

Skip /login. With ANTHROPIC_AUTH_TOKEN set, Claude Code authenticates with the token and never opens the browser flow.

Can I switch models mid-session?

Yes — /model inside Claude Code, or change ANTHROPIC_MODEL. Any Claude model in the Crazyrouter catalogue works; Opus for hard refactors, Sonnet for daily work, Haiku for cheap sub-agents.

Is prompt caching and extended thinking supported?

Yes. Requests are relayed on the native Messages API, so cache_control breakpoints and thinking budgets pass through unchanged and cached reads are billed at the cache rate.