mysql-server MCP Server

A Model Context Protocol server for MySQL database access

This is a TypeScript-based MCP server that provides tools for querying MySQL databases. It demonstrates core MCP concepts by providing:

• Tools for executing SQL queries
• Connection to MySQL databases via environment variables

Features

Tools

• query - Execute SQL queries
• Takes SQL query string as required parameter
• Returns query results

Configuration

Set the following environment variables in your MCP server configuration:

• MYSQL_HOST: MySQL server host
• MYSQL_USER: MySQL username
• MYSQL_PASSWORD: MySQL password
• MYSQL_DATABASE: MySQL database name

Development

Install dependencies:

npm install

Build the server:

npm run build

For development with auto-rebuild:

npm run watch

Installation

To use with Claude Desktop, add the server config:

On MacOS: ~/Library/Application Support/Claude/claude_desktop_config.json

On Windows: %APPDATA%/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "mysql": {
      "command": "/path/to/mysql-server/build/index.js",
      "env": {
        "MYSQL_HOST": "your-mysql-host",
        "MYSQL_USER": "your-mysql-user",
        "MYSQL_PASSWORD": "your-mysql-password",
        "MYSQL_DATABASE": "your-mysql-database"
      }
    }
  }
}

Debugging

Since MCP servers communicate over stdio, debugging can be challenging. We recommend using the MCP Inspector, which is available as a package script:

npm run inspector

The Inspector will provide a URL to access debugging tools in your browser.