MCP Server TypeScript Starter

This is a Model Context Protocol (MCP) server implementation that provides location services. It demonstrates how to build an MCP server using TypeScript with real-world functionality for location lookups via coordinates or IP addresses.

Features

• TypeScript configuration
• Complete MCP server setup
• Location service implementation
  • Coordinate-based location lookup
  • IP-based location lookup (using IPInfo.io)
  • Health check endpoint
• Type-safe development environment
• Integration with external APIs

Installation

npm install mylocation-mcp

Usage

1. Create a .env file with your IPInfo.io API token:

IPINFO_TOKEN=your_ipinfo_token_here

1. Import and use in your code:

import { McpServer } from 'mylocation-mcp';

Development

If you want to modify or contribute to the package:

# Clone the repository
git clone https://github.com/yhwancha/mylocation-mcp.git
cd mylocation-mcp

# Install dependencies
npm install

# Set up environment variables
cp .env.example .env
# Edit .env and add your IPInfo.io API token

# Build the project
npm run build

Project Structure

.
├── src/
│   └── index.ts    # Main server implementation with location tools
├── build/           # Compiled JavaScript files
├── package.json    # Project dependencies and scripts
├── tsconfig.json   # TypeScript configuration
├── .env.example    # Environment variables template
└── README.md      # Documentation

Implemented Tools

1. get-location-by-coordinates

server.tool(
  "get-location-by-coordinates",
  "Get location information from provided coordinates",
  {
    latitude: z.string().describe("Latitude coordinate (-90 to 90)"),
    longitude: z.string().describe("Longitude coordinate (-180 to 180)")
  },
  async ({ latitude, longitude }) => {
    // Implementation details...
  }
);

2. get-location-by-ip

server.tool(
  "get-location-by-ip",
  "Get location information from IP address",
  {
    ipAddress: z.string().describe("IP address to lookup")
  },
  async ({ ipAddress }) => {
    // Implementation details...
  }
);

3. health

server.tool(
  "health",
  "Check the health status of the service",
  {},
  async () => {
    // Implementation details...
  }
);

MCP Server Configuration

To use this MCP server in your project, add the following configuration:

{
    "mcpServers": {
        "location-service": {
            "command": "npx",
            "args": [
              "-y",
              "mylocation-mcp-server"
            ],
            "env": {
              "IPINFO_TOKEN": <IPINFO_TOKEN>
            }
        }
    }
}

Response Format

All tools return responses in this format:

{
  "content": [
    {
      "type": "text",
      "text": "JSON string containing the response data"
    }
  ]
}

The response data follows this structure:

{
  "status": "success|error",
  "source": "user_provided|ip_based",
  "data": {
    // Location data when successful
  },
  "error": "Error message when failed"
}

Dependencies

• @modelcontextprotocol/sdk: MCP server implementation
• zod: Schema validation
• axios: HTTP client for IPInfo API
• dotenv: Environment variable management
• TypeScript development tools

License

MIT