Claude Code Open

🚀 Claude Code Open

*A universal LLM proxy that connects Claude Code to any language model provider*

Production-ready LLM proxy server that converts requests from various LLM providers to Anthropic's Claude API format. Built with Go for high performance and reliability.

As simple as CCO_API_KEY="" cco code and then selecting openrouter,qwen/qwen3-coder as model and voila

*Inspired by Claude Code Router but rebuilt from the ground up to actually work reliably.*

✨ Features

🌐 Multi-Provider Support
- OpenRouter - Multiple models from different providers
- OpenAI - Direct GPT model access
- Anthropic - Native Claude model support
- NVIDIA - Nemotron models via API
- Google Gemini - Gemini model family

⚡ Zero-Config Setup
- Run with just CCO_API_KEY environment variable
- No configuration file required to get started
- Smart defaults for all providers

🔧 Advanced Configuration
- YAML Configuration with automatic defaults
- Model Whitelisting with pattern matching
- Dynamic Model Selection using comma notation
- API Key Protection for enhanced security

🔄 Smart Request Handling
- Dynamic Request Transformation between formats
- Automatic Provider Detection and routing
- Streaming Support for all providers

🚀 Quick Start
💡 Note: When installed with go install, the binary is named claude-code-open. Throughout this documentation, you can substitute cco with claude-code-open or create an alias as shown in the installation section.

📦 Installation

📥 Option 1: Install with Go (Recommended)

The easiest way to install is using Go's built-in installer:

🔨 Option 2: Build from Source

⚙️ Option 3: Install with Custom Binary Name

🔑 Quick Start with CCO_API_KEY

For the fastest setup, you can run without any configuration file using just the CCO_API_KEY environment…