Anthropic Claude Max Proxy — Development skill for Claude Code

Anthropic Claude Max Proxy

Pure Anthropic proxy for Claude Pro/Max subscriptions using OAuth.

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DISCLAIMER

**FOR EDUCATIONAL PURPOSES ONLY**

This tool:

• Is NOT affiliated with or endorsed by Anthropic
• Uses undocumented OAuth flows from Claude Code
• May violate Anthropic's Terms of Service
• Could stop working at any time without notice
• Comes with NO WARRANTY or support

**USE AT YOUR OWN RISK. The authors assume no liability for any consequences.**

For official access, use Claude Code or Anthropic's API with console API keys.

Prerequisites

• Active Claude Pro or Claude Max subscription
• Python 3.8+
• pip

Quick Start

1. Virtual Environment Setup (Recommended)

python -m venv venv

1. Install:

venv/Scripts/Activate.ps1
pip install -r requirements.txt

1. Configure (optional):

cp config.example.json config.json

1. Run:

python cli.py
# Or with custom bind address:
python cli.py --bind 127.0.0.1

1. Authenticate:

• Select option 2 (Login)
• Browser opens automatically
• Complete login at claude.ai
• Copy the authorization code
• Paste in terminal

1. Start proxy:

• Select option 1 (Start Proxy Server)
• Server runs at http://0.0.0.0:8081 (default, listens on all interfaces)

Client Configuration

Configure your Anthropic API client:

• Base URL: http://:8081 (default: http://0.0.0.0:8081)
• API Key: Any non-empty string (e.g., "dummy")
• Model: claude-sonnet-4-20250514 (or any available Claude model)
• Endpoint: /v1/messages

Available Models

• Supports all Anthropic Models that you have access to with your Claude Pro / Max subscription.

Configuration Priority

1. Environment variables (highest)