MCP MySQL Tool

A powerful and comprehensive MySQL Model Context Protocol (MCP) server that allows AI assistants to interact with MySQL databases effortlessly. Features 12 specialized tools for different database operations with full cross-database support.

🚀 Features

Core Operations

• mysql_query - Execute any SQL query with parameters
• mysql_select - Smart SELECT with WHERE, LIMIT, ORDER BY, and database support
• mysql_insert - Insert data with key-value pairs across databases
• mysql_update - Update with required WHERE clause (safety) across databases
• mysql_delete - Delete with required WHERE clause (safety) across databases

Database Exploration

• mysql_show_databases - List all available databases
• mysql_show_tables - List all tables in specified or current database
• mysql_describe_table - Show table structure and columns from any database
• mysql_table_info - Comprehensive table analysis (structure, indexes, constraints) from any database
• mysql_count_rows - Count rows with optional WHERE conditions from any database

Advanced Features

• mysql_custom_connection - Execute queries with custom host/user/password (password optional)
• mysql_test_connection - Test connection with environment or custom parameters
• Cross-database operations - All tools support database parameter for multi-database workflows
• Safe parameterized queries to prevent SQL injection
• Environment-based configuration
• Comprehensive error handling
• JSON responses optimized for AI parsing

📦 Installation

pip install mcp-mysql-tool

⚙️ Configuration

Environment Variables

Set these environment variables for default connection:

export MYSQL_HOST=localhost
export MYSQL_PORT=3306
export MYSQL_USER=your_username
export MYSQL_PASSWORD=your_password
export MYSQL_DATABASE=your_database  # Optional

MCP Client Configuration

Add to your MCP client configuration:

{
  "mcpServers": {
    "mysql": {
      "command": "mcp-mysql-tool",
      "env": {
        "MYSQL_HOST": "localhost",
        "MYSQL_USER": "root",
        "MYSQL_PASSWORD": "password",
        "MYSQL_DATABASE": "mydb"
      }
    }
  }
}

🛠️ Usage Examples

Basic Operations

# List all databases
mysql_show_databases()

# Smart SELECT with conditions
mysql_select({
  "table": "users",
  "columns": ["id", "name", "email"],
  "where": "active = 1",
  "limit": 10,
  "order_by": "created_at DESC"
})

# SELECT from specific database
mysql_select({
  "table": "posts",
  "database": "wordpress",
  "where": "post_status = 'publish'",
  "limit": 5
})

# Safe INSERT
mysql_insert({
  "table": "users",
  "data": {
    "name": "John Doe",
    "email": "john@example.com",
    "active": 1
  }
})

# INSERT into specific database
mysql_insert({
  "table": "products",
  "database": "ecommerce",
  "data": {
    "name": "Widget",
    "price": 29.99,
    "category": "tools"
  }
})

# Safe UPDATE (WHERE required)
mysql_update({
  "table": "users",
  "data": {"last_login": "2024-01-01"},
  "where": "id = 123"
})

# UPDATE across databases
mysql_update({
  "table": "orders",
  "database": "shop",
  "data": {"status": "shipped"},
  "where": "order_id = 456"
})

Database Exploration

# List tables in current database
mysql_show_tables()

# List tables in specific database
mysql_show_tables({"database": "wordpress"})

# Describe table structure
mysql_describe_table({"table_name": "users"})

# Describe table from specific database
mysql_describe_table({
  "table_name": "wp_posts",
  "database": "wordpress"
})

# Get comprehensive table info
mysql_table_info({"table_name": "users"})

# Get table info from specific database
mysql_table_info({
  "table_name": "wp_users",
  "database": "wordpress"
})

Custom Connection

# Connect to different server (password now optional)
mysql_custom_connection({
  "host": "remote-server.com",
  "user": "remote_user",
  "query": "SELECT COUNT(*) FROM products"
})

Row Counting

# Count rows with conditions
mysql_count_rows({
  "table": "orders",
  "where": "status = 'completed' AND created_at > '2024-01-01'"
})

# Count from specific database
mysql_count_rows({
  "table": "posts",
  "database": "blog",
  "where": "published = 1"
})

🔒 Safety Features

• Required WHERE clauses for UPDATE and DELETE operations
• Parameterized queries to prevent SQL injection
• Connection isolation for custom connections
• Comprehensive error handling with detailed error codes
• Input validation for all parameters

📋 Available Tools

🎯 Perfect for AI

This MCP server is specifically designed to be AI-friendly:

• Structured responses in JSON format
• Clear error messages with error codes
• Flexible parameters for different use cases
• Cross-database operations with database parameter
• Safety guardrails to prevent dangerous operations
• Comprehensive toolset for all database needs