mcp-mysql-connector

MCP server exposing MySQL database functionalities as tools for LLM agents.

mcp-name: io.github.daedalus/mcp-mysql-connector

Overview

mcp-mysql-connector is a Model Context Protocol (MCP) server that provides MySQL database operations as tools for LLM agents. It allows AI assistants to interact with MySQL databases through a standardized protocol, enabling:

Database and table management
Query execution
User authentication and privilege management
Schema introspection
Transaction control

Install

Terminal

pip install mcp-mysql-connector

Quick Start

Running the Server

server.ts

# Run with stdio transport (default)
mcp-mysql-connector

# Or run programmatically
python -c "from mcp_mysql import mcp; mcp.run()"

Configuration

Connect to MySQL using the connect tool:

config.json

{
  "host": "localhost",
  "port": 3306,
  "user": "root",
  "password": "your_password",
  "database": "your_database"
}

MCP Tools

Connection Management

Tool	Description
`connect`	Connect to a MySQL database
`disconnect`	Disconnect from MySQL
`is_connected`	Check connection status
`commit`	Commit current transaction
`rollback`	Rollback current transaction

Query Execution

Tool	Description
`execute_query`	Execute raw SQL query and return results

Database Operations

Tool	Description
`list_databases`	List all databases on server
`create_database`	Create a new database
`drop_database`	Drop a database
`database_exists`	Check if database exists

Table Operations

Tool	Description
`list_tables`	List tables in a database
`describe_table`	Get table schema
`create_table`	Create a new table
`drop_table`	Drop a table
`table_exists`	Check if table exists

Column & Index Operations

Tool	Description
`show_columns`	Show column details
`show_indexes`	Show index details
`create_index`	Create an index
`drop_index`	Drop an index

User Management

Tool	Description
`create_user`	Create a MySQL user
`drop_user`	Drop a MySQL user
`grant_privileges`	Grant privileges to user
`revoke_privileges`	Revoke privileges from user
`show_privileges`	Show user privileges

Server Information

Tool	Description
`server_status`	Get MySQL server status

MCP Resources

The server provides dynamic resources for database and table metadata:

database://{name} - Database metadata including table list
table://{db}/{table} - Table metadata including schema, columns, and indexes

Usage Examples

Connect and Query

Dockerfile

# First, connect to database
connect(host="localhost", user="root", password="secret", database="mydb")

# Execute a query
execute_query(sql="SELECT * FROM users WHERE active = true")

# List all tables
list_tables(database="mydb")

Create Database and Table

Code

# Create a database
create_database(name="newapp")

# Create a table
create_table(name="users", schema="id INT PRIMARY KEY AUTO_INCREMENT, name VARCHAR(255), email VARCHAR(255) UNIQUE")

User Management

Code

# Create a new user with password
create_user(username="app_user", host="localhost", password="secure_password")

# Grant privileges
grant_privileges(privileges="SELECT,INSERT,UPDATE,DELETE", on="newapp.*", username="app_user", host="localhost")

Transaction Control

Code

# Start transaction
execute_query(sql="BEGIN")

# Execute operations
execute_query(sql="INSERT INTO accounts (balance) VALUES (100)")

# Commit or rollback
commit()  # or rollback()

Environment Variables

The server supports configuration via environment variables:

server.ts

export MYSQL_HOST=localhost
export MYSQL_PORT=3306
export MYSQL_USER=root
export MYSQL_PASSWORD=secret
export MYSQL_DATABASE=mydb

Development

bash

# Clone repository
git clone https://github.com/daedalus/mcp-mysql-connector.git
cd mcp-mysql-connector

# Create virtual environment
python -m venv venv
source venv/bin/activate

# Install dependencies
pip install -e ".[test]"

# Run tests
pytest

# Format code
ruff format src/ tests/

# Lint
ruff check src/ tests/

# Type check
mypy src/

Architecture

Code

mcp-mysql-connector/
├── src/mcp_mysql/
│   ├── core/models.py       # Data models (QueryResult, TableSchema, etc.)
│   ├── adapters/mysql.py    # MySQL connection & pooling
│   ├── services/connection.py  # Connection manager
│   ├── tools/mysql_tools.py   # MCP tool implementations
│   └── mcp.py              # FastMCP server setup
└── tests/                   # Test suite

Requirements

Python 3.11+
fastmcp >= 2.0.0
pymysql >= 1.1.0
sqlparse >= 0.4.0

License

MIT License - see LICENSE for details.