Multi MySQL Server
FreeNot checkedEnables AI coding assistants to query and manage multiple MySQL and MariaDB databases through a single MCP server, with SQL injection protection and read-only m
About
Enables AI coding assistants to query and manage multiple MySQL and MariaDB databases through a single MCP server, with SQL injection protection and read-only mode by default.
README
CI License: MIT Node.js TypeScript MCP
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
--labelto 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 default —
SET SESSION TRANSACTION READ ONLYwraps 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 Projects
- multi-postgres-mcp-server — Same architecture for PostgreSQL
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 —
--labelпоказывает 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 умолчанию —
SET 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 Code、Cursor、Windsurf、GitHub 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.
Installing Multi MySQL Server
This server has no published package — it is built from source. Open the repository and follow its README.
▸ github.com/VKirill/multi-mysql-mcp-serverFAQ
Is Multi MySQL Server MCP free?
Yes, Multi MySQL Server MCP is free — one-click install via Unyly at no cost.
Does Multi MySQL Server need an API key?
No, Multi MySQL Server runs without API keys or environment variables.
Is Multi MySQL Server hosted or self-hosted?
A hosted option is available: Unyly runs the server in the cloud, no local setup required.
How do I install Multi MySQL Server in Claude Desktop, Claude Code or Cursor?
Open Multi MySQL Server on unyly.org, pick your client tab (Claude Desktop, Claude Code, Cursor) and press Install — the config is generated automatically, no JSON editing.
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