MCP Gateway

A TypeScript implementation of a Model Context Protocol (MCP) gateway that manages multiple MCP servers and provides a unified interface for tools.

Features

• Manages multiple MCP servers through a single gateway
• Supports both SSE and STDIO transports
• Configurable through JSON configuration
• Improved process management using spawn-rx
• TypeScript implementation for better type safety

Setup

1. Clone the repository
2. Install dependencies:

   npm install
   

3. Copy the example configuration:

   cp config.json.example config.json
   

4. Edit config.json to configure your MCP servers
5. Build the project:

   npm run build
   

6. Start the gateway:

   npm start
   

Configuration

The gateway is configured through config.json. Each MCP server needs:

• command: The command to run the server
• args: Array of command arguments
• env: (Optional) Environment variables for the server

Example configuration:

{
  "mcp": {
    "servers": {
      "filesystem": {
        "command": "npx",
        "args": [
          "-y",
          "@modelcontextprotocol/server-filesystem",
          "/path/to/allowed/directory"
        ]
      }
    }
  }
}

Development

• npm run build: Build the TypeScript code
• npm start: Start the gateway
• npm run dev: Run TypeScript in watch mode
• npm run dev:watch: Run both TypeScript watch and nodemon

License

ISC