🔧 MySQL MCP Server

A Model Context Protocol (MCP) server for MySQL database operations. Provides 4 powerful tools for database interaction through any MCP-compatible client.

✨ Features

• 🔍 Execute SQL Queries - Run any SELECT, INSERT, UPDATE, DELETE commands
• 📊 List Databases - View all available databases
• 📋 List Tables - Show tables in any database
• 🏗️ Describe Tables - Get detailed table structure information
• 🔒 Secure - Environment-based configuration, no hardcoded credentials
• ⚡ Fast - Built with TypeScript and connection pooling

🚀 Quick Start

Installation

# Clone the repository
git clone https://github.com/myheisenberg/mysql-mcp-server.git
cd mysql-mcp-server

# Install dependencies
npm install

# Build the project
npm run build

Configuration

The server uses environment variables for database configuration:

DB_HOST=localhost        # MySQL host (default: localhost)
DB_USER=root            # MySQL username (default: root)
DB_PASSWORD=            # MySQL password (default: empty)
DB_PORT=3306           # MySQL port (default: 3306)

📖 Usage

With Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "mysql": {
      "command": "node",
      "args": ["path/to/mysql-mcp-server/dist/index.js"],
      "env": {
        "DB_HOST": "localhost",
        "DB_USER": "your_username",
        "DB_PASSWORD": "your_password",
        "DB_PORT": "3306"
      }
    }
  }
}

With Cursor IDE

Add to your MCP configuration:

{
  "mcpServers": {
    "mysql": {
      "command": "node",
      "args": ["path/to/mysql-mcp-server/dist/index.js"],
      "env": {
        "DB_HOST": "localhost",
        "DB_USER": "your_username", 
        "DB_PASSWORD": "your_password",
        "DB_PORT": "3306"
      }
    }
  }
}

🛠️ Available Tools

1. mysql_query

Execute any MySQL query and get formatted results.

Example: "Run a SELECT query on the users table"

2. mysql_databases

List all available databases on the MySQL server.

Example: "Show me all databases"

3. mysql_tables

List all tables in a specific database.

Example: "What tables are in the blog database?"

4. mysql_describe

Get detailed information about a table's structure.

Example: "Describe the structure of the users table"

🔧 Development

# Install dependencies
npm install

# Development mode (watch for changes)
npm run dev

# Build for production
npm run build

# Start the server
npm start

📦 Project Structure

mysql-mcp-server/
├── src/
│   └── index.ts          # Main MCP server implementation
├── dist/                 # Compiled JavaScript (auto-generated)
├── package.json          # Project dependencies and scripts
├── tsconfig.json         # TypeScript configuration
├── .gitignore           # Git ignore rules
└── README.md            # This file

🔒 Security

• No hardcoded credentials - All database connection details come from environment variables
• Connection pooling - Efficient and secure database connections
• Error handling - Proper error messages without exposing sensitive information

🤝 Contributing

1. Fork the repository
2. Create your feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add some amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

🙏 Acknowledgments

• Built with the Model Context Protocol SDK
• Uses mysql2 for MySQL connectivity
• Inspired by the MCP community

📞 Support

If you encounter any issues or have questions:

1. Check the Issues page
2. Create a new issue if your problem isn't already reported
3. Provide as much detail as possible including error messages and configuration

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