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VKirill

Multi-MySQL MCP Server

by VKirill

Multi-MySQL MCP Server

CI License: MIT Node.js TypeScript MCP

English | Русский | 中文


English

A Model Context Protocol (MCP) server for MySQL and MariaDB — designed for AI coding assistants like Claude Code, Cursor, Windsurf, GitHub Copilot, and any MCP-compatible client.

One server, many databases. Connect multiple MySQL and MariaDB databases through a single MCP server with built-in SQL injection protection, read-only mode, connection pooling, and hot-reload configuration.

Why Use This?

  • AI-native database access — let Claude, Cursor, or Copilot query your MySQL databases directly

  • Multi-database — manage all your MySQL connections from one MCP server

  • Secure by default — state-machine SQL injection parser, read-only transactions, prepared statements

  • Hot-reload config — change connections without restarting the server

  • Per-project isolation — use --label to expose only relevant databases

  • 7 powerful tools — query, describe, explain, health check and more

  • Broad compatibility — MySQL 5.7–9.x, MariaDB 10.x–11.x, AWS RDS, Azure, GCP, PlanetScale

Tools

Tool

Description

mysql_list_databases

List all configured database connections with status

mysql_query

Execute SQL queries with read-only enforcement and SQL injection protection

mysql_list_tables

List tables with row counts, storage engine (InnoDB, MyISAM), and data size

mysql_describe_table

Show columns, types, indexes, primary keys, foreign keys, and constraints

mysql_list_schemas

List all databases/schemas available on the MySQL server

mysql_health_check

Test connectivity, MySQL version, and response latency

mysql_explain

Run EXPLAIN ANALYZE with automatic ROLLBACK for safety

Quick Start

Install

git clone https://github.com/VKirill/multi-mysql-mcp-server.git
cd multi-mysql-mcp-server
npm install
npm run build

Configure

Create ~/.mcp-mysql/config.json (or use --config to specify a custom path):

{
  "connections": [
    {
      "label": "local",
      "host": "localhost",
      "port": 3306,
      "user": "dev",
      "password": "devpass123",
      "database": "myapp"
    },
    {
      "label": "production",
      "url": "mysql://${PROD_USER}:${PROD_PASS}@db.example.com:3306/prod_db",
      "readOnly": true,
      "ssl": true
    }
  ]
}

Add to Claude Code

claude mcp add mysql -- node /path/to/dist/index.js --config ~/.mcp-mysql/config.json

Or add to ~/.claude.json:

{
  "mcpServers": {
    "mysql": {
      "type": "stdio",
      "command": "node",
      "args": ["/path/to/dist/index.js", "--config", "/path/to/config.json"]
    }
  }
}

Add to Cursor

Add to .cursor/mcp.json:

{
  "mcpServers": {
    "mysql": {
      "command": "node",
      "args": ["/path/to/dist/index.js", "--config", "/path/to/config.json"]
    }
  }
}

Docker

docker build -t mcp-mysql .
docker run -v /path/to/config.json:/app/config.json mcp-mysql --config /app/config.json

Configuration

Connection Fields

Field

Type

Required

Default

Description

label

string

Yes

Unique identifier for the database

host

string

*

MySQL server hostname

port

number

No

3306

MySQL server port

user

string

*

Database username

password

string

No

""

Database password

database

string

*

Default database/schema name

url

string

*

MySQL connection URL (alternative to host/user/database)

ssl

bool/object

No

Enable SSL/TLS (supports AWS RDS, Azure, GCP Cloud SQL)

readOnly

boolean

No

true

Enforce read-only transactions

enabled

boolean

No

true

Enable/disable this connection

poolSize

number

No

5

Maximum pool connections (1–100)

* Either url or host + user + database is required.

Environment Variables in Config

Use ${VAR} or ${VAR:-default} syntax in any config string value:

{
  "host": "${MYSQL_HOST:-localhost}",
  "user": "${MYSQL_USER}",
  "password": "${MYSQL_PASSWORD}"
}

CLI Options

Option

Description

--config <path>

Path to config file (default: ~/.mcp-mysql/config.json)

--label <name>

Restrict server to a single database (per-project isolation)

Environment variable: MCP_MYSQL_CONFIG — alternative config file path.

Security

  • SQL injection protection — state-machine parser detects multi-statement queries, handles MySQL-specific syntax (backtick identifiers, # comments, backslash escapes)

  • DDL protection — blocks CREATE, DROP, ALTER, TRUNCATE statements

  • Prepared statements — all user parameters go through connection.execute() with ? placeholders

  • Read-only by defaultSET SESSION TRANSACTION READ ONLY wraps all queries in transactions

  • EXPLAIN safety — EXPLAIN ANALYZE always wrapped in transaction with ROLLBACK

  • Config permissions — warns if config file is world-readable on Unix

  • Zod validation — config file validated with strict schemas

See SECURITY.md for the full security model and responsible disclosure policy.

Compatibility

  • MySQL 5.7, 8.0, 8.4, 9.x

  • MariaDB 10.x, 11.x

  • Cloud: AWS RDS, Azure Database for MySQL, Google Cloud SQL, PlanetScale, Aiven

  • Node.js >= 18

  • MCP clients: Claude Code, Cursor, Windsurf, GitHub Copilot, VS Code, any MCP-compatible tool


Related MCP server: MySQL MCP Server

Русский

MCP-сервер для MySQL и MariaDB — предназначен для AI-ассистентов: Claude Code, Cursor, Windsurf, GitHub Copilot и любых MCP-совместимых клиентов.

Один сервер — много баз данных. Подключайте несколько MySQL и MariaDB баз через один MCP-сервер со встроенной защитой от SQL-инъекций, режимом read-only, пулом соединений и горячей перезагрузкой конфигурации.

Преимущества

  • AI-нативный доступ к БД — Claude, Cursor или Copilot напрямую запрашивают ваши MySQL базы

  • Мульти-база — все MySQL-подключения в одном MCP-сервере

  • Безопасность по умолчанию — state-machine парсер SQL-инъекций, read-only транзакции, prepared statements

  • Горячая перезагрузка — меняйте подключения без перезапуска сервера

  • Изоляция по проектам--label показывает только нужные базы

  • 7 инструментов — запросы, описание таблиц, EXPLAIN, health check и др.

  • Широкая совместимость — MySQL 5.7–9.x, MariaDB 10.x–11.x, AWS RDS, Azure, GCP, PlanetScale

Инструменты

Инструмент

Описание

mysql_list_databases

Список всех настроенных подключений к БД

mysql_query

Выполнение SQL-запросов с read-only и защитой от инъекций

mysql_list_tables

Список таблиц: кол-во строк, движок (InnoDB, MyISAM), размер

mysql_describe_table

Колонки, типы, индексы, первичные и внешние ключи, ограничения

mysql_list_schemas

Список всех баз данных/схем на сервере MySQL

mysql_health_check

Проверка соединения, версия MySQL, задержка

mysql_explain

EXPLAIN ANALYZE с автоматическим ROLLBACK

Быстрый старт

git clone https://github.com/VKirill/multi-mysql-mcp-server.git
cd multi-mysql-mcp-server
npm install
npm run build

Создайте ~/.mcp-mysql/config.json:

{
  "connections": [
    {
      "label": "local",
      "host": "localhost",
      "port": 3306,
      "user": "dev",
      "password": "devpass123",
      "database": "myapp"
    }
  ]
}

Добавьте в Claude Code (~/.claude.json):

{
  "mcpServers": {
    "mysql": {
      "type": "stdio",
      "command": "node",
      "args": ["путь/до/dist/index.js", "--config", "путь/до/config.json"]
    }
  }
}

Безопасность

  • Защита от SQL-инъекций — state-machine парсер обрабатывает backtick-идентификаторы, # комментарии, \ экранирование

  • Защита от DDL — блокирует CREATE, DROP, ALTER, TRUNCATE

  • Prepared statements — параметры через connection.execute() с ? плейсхолдерами

  • Read-only по умолчаниюSET SESSION TRANSACTION READ ONLY

  • EXPLAIN — всегда в транзакции с ROLLBACK

  • Валидация конфига — Zod-схемы

Совместимость

  • MySQL 5.7, 8.0, 8.4, 9.x | MariaDB 10.x, 11.x

  • AWS RDS, Azure Database for MySQL, Google Cloud SQL, PlanetScale, Aiven

  • Node.js >= 18

  • Claude Code, Cursor, Windsurf, GitHub Copilot, VS Code


中文

MySQL 和 MariaDB 的 MCP 服务器 — 专为 AI 编码助手设计:Claude CodeCursorWindsurfGitHub Copilot 以及任何 MCP 兼容客户端

一个服务器,多个数据库。 通过单个 MCP 服务器连接多个 MySQL 和 MariaDB 数据库,内置 SQL 注入防护、只读模式、连接池和热重载配置。

优势

  • AI 原生数据库访问 — 让 Claude、Cursor 或 Copilot 直接查询你的 MySQL 数据库

  • 多数据库 — 在一个 MCP 服务器中管理所有 MySQL 连接

  • 默认安全 — 状态机 SQL 注入解析器、只读事务、预处理语句

  • 热重载配置 — 更改连接无需重启服务器

  • 项目隔离 — 使用 --label 仅暴露相关数据库

  • 7 个工具 — 查询、表描述、EXPLAIN、健康检查等

  • 广泛兼容 — MySQL 5.7–9.x、MariaDB 10.x–11.x、AWS RDS、Azure、GCP、PlanetScale

工具列表

工具

说明

mysql_list_databases

列出所有已配置的数据库连接及状态

mysql_query

执行 SQL 查询,强制只读模式并防止 SQL 注入

mysql_list_tables

列出表:行数、存储引擎(InnoDB、MyISAM)、数据大小

mysql_describe_table

显示列、类型、索引、主键、外键和约束

mysql_list_schemas

列出 MySQL 服务器上所有数据库/模式

mysql_health_check

测试连接、MySQL 版本和响应延迟

mysql_explain

执行 EXPLAIN ANALYZE 并自动 ROLLBACK

快速开始

git clone https://github.com/VKirill/multi-mysql-mcp-server.git
cd multi-mysql-mcp-server
npm install
npm run build

创建 ~/.mcp-mysql/config.json

{
  "connections": [
    {
      "label": "local",
      "host": "localhost",
      "port": 3306,
      "user": "dev",
      "password": "devpass123",
      "database": "myapp"
    }
  ]
}

添加到 Claude Code 配置(~/.claude.json):

{
  "mcpServers": {
    "mysql": {
      "type": "stdio",
      "command": "node",
      "args": ["dist/index.js的路径", "--config", "config.json的路径"]
    }
  }
}

安全性

  • SQL 注入防护 — 状态机解析器处理反引号标识符、# 注释、\ 转义

  • DDL 防护 — 阻止 CREATE、DROP、ALTER、TRUNCATE 语句

  • 预处理语句 — 通过 connection.execute() 使用 ? 占位符

  • 默认只读SET SESSION TRANSACTION READ ONLY

  • EXPLAIN 安全 — 始终在事务中执行并 ROLLBACK

  • 配置验证 — Zod 模式验证

兼容性

  • MySQL 5.7、8.0、8.4、9.x | MariaDB 10.x、11.x

  • AWS RDS、Azure Database for MySQL、Google Cloud SQL、PlanetScale、Aiven

  • Node.js >= 18

  • Claude Code、Cursor、Windsurf、GitHub Copilot、VS Code


Contributing

See CONTRIBUTING.md for development setup and guidelines.

License

MIT — see LICENSE for details.

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