mcp-mux

A Model Context Protocol (MCP) multiplexer that intelligently routes to the right tool from hundreds of available options using semantic search.

Why mcp-mux?

Problem: Managing multiple MCP servers means dealing with hundreds of tools, making it hard for LLMs to find the right one.

Solution: mcp-mux acts as an intelligent router that exposes just two tools:

• search - Find tools using natural language
• execute - Run the tool you found

This dramatically simplifies tool discovery and improves LLM performance with MCP servers.

Requirements

• Python 3.10+
• MCP-compatible client (e.g., Claude Desktop)

Installation

# Using uvx (recommended)
uvx mcp-mux init

# Or install globally
pip install mcp-mux

Quick Start

1. Initialize configuration:

uvx mcp-mux init

2. Configure your MCP servers in ~/.mux/config.json:

{
  "mcpServers": {
    "filesystem": {
      "command": "uvx",
      "args": ["mcp-server-filesystem", "/Users/me/projects"]
    },
    "github": {
      "command": "npx",
      "args": ["-y", "@modelcontextprotocol/server-github"]
    }
  }
}

3. Add mcp-mux to your MCP client configuration:

{
  "mcpServers": {
    "mux": {
      "command": "uvx",
      "args": ["mcp-mux"]
    }
  }
}

How It Works

Instead of exposing hundreds of tools from multiple servers, mcp-mux exposes just two:

1. search - Find tools using natural language
2. execute - Run a specific tool

Configuration

# List available embedding models
uvx mcp-mux model --list

# Switch to a different model
uvx mcp-mux model BAAI/bge-small-en-v1.5

License

MIT

Development Status

This project is in early development. Features may change.