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Claude Max Proxy

Routes Anthropic API requests through your Claude Pro/Max subscription instead of using API credits. Supports all models including Sonnet 4.6 and Opus 4.6.

CLIProxyAPI (recommended)

Uses CLIProxyAPI — a Go binary that wraps the Claude Code OAuth flow into an Anthropic-compatible API server. Gives access to all subscription models (Sonnet 4.6, Opus 4.6, Sonnet 4.5, Opus 4.5, Haiku 4.5, etc.).

Setup

cd proxy/cliproxyapi

# First time: authenticate (opens browser)
./cli-proxy-api.exe -claude-login -config config.yaml

# Start the proxy server (port 8317)
./cli-proxy-api.exe -config config.yaml

.env config

ANTHROPIC_PROXY_URL=http://127.0.0.1:8317
ANTHROPIC_PROXY_KEY=lunar-proxy-key

Verify

# List models
curl -s http://127.0.0.1:8317/v1/models -H "Authorization: Bearer lunar-proxy-key" | python -m json.tool

# Test Sonnet 4.6
curl -s -X POST http://127.0.0.1:8317/v1/messages \
  -H "Authorization: Bearer lunar-proxy-key" \
  -H "Content-Type: application/json" \
  -H "anthropic-version: 2023-06-01" \
  -d '{"model":"claude-sonnet-4-6","max_tokens":50,"messages":[{"role":"user","content":"Say hi"}]}'

Notes

  • The backend's LLMRouter falls back to non-streaming when using the proxy (CLIProxyAPI streaming adds extra fields that confuse litellm's SSE parser). Text arrives as a single chunk instead of token-by-token.
  • Auth credentials are saved in ~/.cli-proxy-api/. Token auto-refreshes every 15 minutes.
  • The API key (lunar-proxy-key) is configured in config.yaml and matched in .env via ANTHROPIC_PROXY_KEY.

Legacy OAuth Proxy (Haiku only)

The original Python-based OAuth proxy in proxy/. Only supports Haiku due to Anthropic's OAuth scope restrictions.

Setup

pip install -r requirements.txt
python run.py auth    # authenticate
python run.py serve   # start on port 8082

.env config

ANTHROPIC_PROXY_URL=http://127.0.0.1:8082
ANTHROPIC_PROXY_KEY=proxy

Limitations

  • OAuth user:inference scope only allows Haiku models. Sonnet/Opus return invalid_request_error.
  • Token expires ~8 hours; auto-refreshes via refresh token.