Mariadb MCP Server

This is an MCP server that provides access to MariaDB/MySQL databases. It supports functions such as listing databases, describing table structures, and executing SQL queries. It has security features such as read-only access and query validation.

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update time : 2025-08-15

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🚀 MariaDB / MySQL Database Access MCP Server

This MCP server enables access to MariaDB / MySQL databases, offering functionalities like listing databases and tables, describing table schemas, and executing SQL queries.

🚀 Quick Start

This MCP server provides access to MariaDB / MySQL databases.

It allows you to:

List available databases
List tables in a database
Describe table schemas
Execute SQL queries

✨ Features

Read-only access Default: SELECT, SHOW, DESCRIBE, and EXPLAIN
Query validation: Prevents SQL injection and blocks any data modification attempts
Query timeout: Prevents long-running queries from consuming resources
Row limit: Prevents excessive data return

📦 Installation

Option 1: Build from Source

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

# Install dependencies and build
pnpm install
pnpm run build

2. Configure environment variables

The server requires the following environment variables:

MARIADB_HOST: Database server hostname
MARIADB_PORT: Database server port (default: 3306)
MARIADB_USER: Database username
MARIADB_PASSWORD: Database password
MARIADB_DATABASE: Default database name (optional)
MARIADB_ALLOW_INSERT: false
MARIADB_ALLOW_UPDATE: false
MARIADB_ALLOW_DELETE: false
MARIADB_TIMEOUT_MS: 10000
MARIADB_ROW_LIMIT: 1000

3. Add to MCP settings

Add the following configuration to your MCP settings file:

If you built from source:

{
  "mcpServers": {
    "mariadb": {
      "command": "node",
      "args": ["/path/to/mariadb-mcp-server/dist/index.js"],
      "env": {
        "MARIADB_HOST": "your-host",
        "MARIADB_PORT": "3306",
        "MARIADB_USER": "your-user",
        "MARIADB_PASSWORD": "your-password",
        "MARIADB_DATABASE": "your-default-database",
        "MARIADB_ALLOW_INSERT": "false",
        "MARIADB_ALLOW_UPDATE": "false",
        "MARIADB_ALLOW_DELETE": "false",
        "MARIADB_TIMEOUT_MS": "10000",
        "MARIADB_ROW_LIMIT": "1000",
      },
      "disabled": false,
      "autoApprove": []
    }
  }
}

💻 Usage Examples

list_databases

Lists all accessible databases on the MariaDB / MySQL server. Parameters: None

Example:

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "sessionId": "session_id from /sse call",
    "name": "list_databases"
  }
}

list_tables

Lists all tables in a specified database.

Parameters:

database (optional): Database name (uses default if not specified)

Example:

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "sessionId": "session_id from /sse call",
    "name": "list_tables",
    "database": "my_database_name"
  }
}

describe_table

Shows the schema for a specific table.

Parameters:

database (optional): Database name (uses default if not specified)
table (required): Table name

Example:

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "sessionId": "session_id from /sse call",
    "name": "describe_table",
    "database": "my_database_name",
    "table": "my_table_name"
  }
}

execute_query

Executes a SQL query.

Parameters:

query (required): SQL query
database (optional): Database name (uses default if not specified)

Example:

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "sessionId": "session_id from /sse call",
    "name": "execute_query",
    "query": "SELECT * FROM my_table LIMIT 10"
  }
}