@suncreation/crush-auth-proxy

Use your Claude Max subscription (OAuth) with Crush CLI — no separate Anthropic API key needed.

This proxy sits between Crush and Anthropic's API, injecting Claude Code OAuth credentials so you can use your existing Claude Max plan.

Quick Start

# One command does everything: login + crush config + auto-start
npx @suncreation/crush-auth-proxy setup

That's it! Now use Crush:

crush run --model anthropic/claude-opus-4-6 "Hello!"

The proxy auto-starts on boot. No manual configuration needed.

Commands

| Command | Description | |---------|-------------| | setup | All-in-one: OAuth login + crush.json config + auto-start service | | setup-token | OAuth login only — opens browser, saves token locally | | setup-crush | Configure crush.json only (adds anthropic provider) | | install-service | Install platform auto-start service (macOS: launchd, Linux: systemd, Windows: Task Scheduler) | | uninstall-service | Remove auto-start service | | start | Start proxy as background daemon (port 18080) | | stop | Stop the daemon | | restart | Restart the daemon | | status | Check if proxy is running + token validity | | logs | Tail daemon logs |

Options

| Option | Description | |--------|-------------| | --port <n> | Custom port (default: 18080) | | --debug | Enable detailed request/response logging | | --foreground | Run in foreground instead of daemon |

How It Works

The proxy replicates Claude Code's authentication mechanism:

1. OAuth PKCE Flow — Authenticates via claude.ai using the same client credentials as Claude Code
2. Request Transformation — Rewrites headers (User-Agent, auth), adds required beta flags, prefixes tool names with mcp_
3. System Prompt Injection — Prepends the Claude Code system prompt identifier
4. Response Streaming — Strips mcp_ prefixes from streamed responses
5. Token Auto-Refresh — Automatically refreshes expired OAuth tokens

Per-User Storage

All config is stored in ~/.config/crush-auth-proxy/:

~/.config/crush-auth-proxy/
  ├── claude-oauth-token.json   # Your OAuth tokens (chmod 0600)
  ├── crush-auth-proxy.mjs      # Stable copy for auto-start service
  ├── proxy.pid                 # Daemon PID
  └── proxy.log                 # Daemon logs

Uninstall

npx @suncreation/crush-auth-proxy uninstall-service
npx @suncreation/crush-auth-proxy stop
rm -rf ~/.config/crush-auth-proxy

Requirements

• Node.js >= 18
• macOS / Linux / Windows
• A Claude Max subscription (claude.ai account)
• Crush CLI installed

Platform-specific auto-start:

• macOS: launchd (built-in)
• Linux: systemd (user service)
• Windows: Task Scheduler

Supported Models

All Anthropic models available through your Claude Max subscription, including:

• anthropic/claude-opus-4-6
• anthropic/claude-sonnet-4-5-20250514
• anthropic/claude-haiku-3-5-20241022
• And more

License

MIT