Zen MCP Server NPX Wrapper

Easy-to-use NPX wrapper for Zen MCP Server - Give Claude access to multiple AI models (Gemini, OpenAI, OpenRouter, Ollama) for enhanced development capabilities.

Quick Start

npx zen-mcp-server-199bio

That's it! The wrapper handles all Docker setup automatically.

What is Zen MCP Server?

Zen MCP Server gives Claude Desktop access to multiple AI models for:

• 🧠 Extended reasoning with Gemini 2.0 Pro's thinking mode
• 💬 Collaborative development with multiple AI perspectives
• 🔍 Code review and architectural analysis
• 🐛 Advanced debugging with specialized models
• 📊 Large context analysis (Gemini: 1M tokens, O3: 200K tokens)
• 🔄 Conversation threading with Redis - AI models maintain context across multiple calls

First Time Setup

On first run, the wrapper will:

1. Check/start Docker Desktop
2. Clone Zen MCP Server to ~/.zen-mcp-server
3. Create .env file and prompt for API keys
4. Build Docker image automatically
5. Start all services via Docker Compose:
   • Zen MCP Server container
   • Redis container (for conversation threading)
   • Log monitor service

Configuration

1. Get API Keys (at least one required)

Choose one or more:

• Gemini: Google AI Studio
• OpenAI: OpenAI Platform
• OpenRouter: OpenRouter (access to 100+ models)
• Local Models: Ollama, vLLM, LM Studio (no API key needed)

2. Configure API Keys

Edit ~/.zen-mcp-server/.env:

# Option 1: Native APIs
GEMINI_API_KEY=your_gemini_key_here
OPENAI_API_KEY=your_openai_key_here

# Option 2: OpenRouter (for multiple models)
OPENROUTER_API_KEY=your_openrouter_key_here

# Option 3: Local models (Ollama example)
CUSTOM_API_URL=http://host.docker.internal:11434/v1
CUSTOM_MODEL_NAME=llama3.2

Usage with Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "zen": {
      "command": "npx",
      "args": ["zen-mcp-server-199bio"]
    }
  }
}

Location of config file:

• macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
• Windows: %APPDATA%\Claude\claude_desktop_config.json
• Linux: ~/.config/Claude/claude_desktop_config.json

Usage with Claude CLI

claude mcp add zen "npx" "zen-mcp-server-199bio"

Available Tools

Once configured, Claude will have access to these tools:

• zen - Default tool for quick AI consultation (alias for chat)
• chat - Collaborative development discussions
• thinkdeep - Extended reasoning (Gemini 2.0 Pro)
• codereview - Professional code review
• precommit - Pre-commit validation
• debug - Advanced debugging assistance
• analyze - Smart file and codebase analysis

Quick Usage: Just say "use zen" for quick AI consultations!

Features

• ✅ Zero config - Just run with npx
• 🐳 Full Docker Compose stack - Includes Redis for conversation threading
• 🔧 Smart setup - Handles all initialization automatically
• 💾 Redis included - Maintains context between AI model calls
• 🔄 Graceful shutdown - Proper cleanup on exit
• 📦 No installation - Always runs latest version
• 🌍 Cross-platform - Works on macOS, Windows (WSL2), Linux

What's Included

The NPX wrapper starts the complete Zen MCP Server stack:

• Zen MCP Server - Main server handling AI model communication
• Redis - For conversation threading and context persistence
• Log Monitor - For debugging and monitoring
• All features from the original Docker Compose setup

Troubleshooting

Docker not starting?

• macOS: Make sure Docker Desktop is installed
• Windows: Requires WSL2 and Docker Desktop
• Linux: Ensure Docker daemon is running

API key issues?

• Check ~/.zen-mcp-server/.env has valid keys
• Ensure at least one API key is configured
• For OpenRouter, check your credits/limits

Connection failed?

1. Restart Claude Desktop after configuration
2. Check Docker containers: docker ps
3. View logs: docker logs zen-mcp-server

Requirements

• Docker Desktop
• Node.js >= 14.0.0
• Git
• At least one API key (Gemini, OpenAI, or OpenRouter)

Links

• Zen MCP Server Repo
• NPX Wrapper Repo
• Model Context Protocol

License

Apache 2.0 - See LICENSE