# ein-ai-proxy

Anthropic-compatible API proxy that routes requests to multiple AI providers based on model name. Built to run on a home server behind nginx, letting you use Claude Code and Roo Code from any machine while keeping costs optimized.

## How it works

Clients (Claude Code CLI, Roo Code, Cline, etc.) send standard Anthropic Messages API requests to your proxy. The proxy inspects the `model` field and forwards the request to the appropriate provider:

| Client requests | Routed to | Why |
|---|---|---|
| `claude-opus-4-6` | Anthropic API | Complex tasks that need the best model |
| `claude-sonnet-4-6` | Z.ai → GLM-4.7 | Daily workhorse, $10/mo flat rate |
| `claude-haiku-4-5-*` | DeepSeek → V3.2 | Trivial tasks, pennies per token |
| `glm-4.7` (direct) | Z.ai | Explicit GLM request |
| `deepseek-chat` (direct) | DeepSeek | Explicit DeepSeek request |

SSE streaming is fully supported — responses are piped through without buffering.

## Setup

```bash
# 1. Copy and edit config
cp config.example.json config.json
nano config.json  # Add your API keys + set authToken

# 2. Deploy (installs systemd service, tests proxy)
chmod +x deploy.sh
./deploy.sh

# 3. Follow the nginx + SSL steps printed by deploy.sh
```

## Client Configuration

### Claude Code CLI

Add to `~/.claude/settings.json`:
```json
{
  "env": {
    "ANTHROPIC_BASE_URL": "https://ai.maybe.zone",
    "ANTHROPIC_AUTH_TOKEN": "your-proxy-auth-token",
    "API_TIMEOUT_MS": "3000000"
  }
}
```

### Roo Code (VS Code)

1. Open Roo Code settings
2. Set API Provider to **Anthropic**
3. Enter your proxy auth token as the API Key
4. Check **Use custom base URL**
5. Enter `https://ai.maybe.zone`

## Switching models

From Claude Code, the default Sonnet model routes to GLM-4.7. To use Opus for a complex task, use `/model` and select Opus — the proxy will route it to the real Anthropic API.

## Files

- `proxy.mjs` — The proxy server (zero dependencies, Node.js 18+)
- `config.json` — Your API keys and auth token (gitignored)
- `config.example.json` — Template config
- `ein-ai-proxy.service` — Systemd unit file
- `nginx-ai-proxy.conf` — Nginx reverse proxy config
- `deploy.sh` — Deployment script

## License

MIT