MCP Database Server

This MCP (Model Context Protocol) server provides database access capabilities to Claude, supporting SQLite, SQL Server, PostgreSQL, and MySQL databases.

MySQL Connection Pooling (remote servers)

This fork includes improvements for MySQL connections when connecting to remote hosting (for example, cPanel). The MySQL adapter now uses a connection pool (mysql2 createPool) with keep-alive and automatic reconnection logic to reduce "connection closed" errors from aggressive remote timeouts. If you run this server locally for your MCP agent, configure your MCP to use the built dist/src/index.js binary (use node <path> in your mcp.json) so it uses this fork's pooled adapter.

Installation

1. Clone the repository:

git clone https://github.com/executeautomation/mcp-database-server.git
cd mcp-database-server

2. Install dependencies:

npm install

3. Build the project:

npm run build

Usage Options

There are two ways to use this MCP server with Claude:

1. Direct usage: Install the package globally and use it directly
2. Local development: Run from your local development environment

Direct Usage with NPM Package

The easiest way to use this MCP server is by installing it globally:

npm install -g @executeautomation/database-server

This allows you to use the server directly without building it locally.

Local Development Setup

If you want to modify the code or run from your local environment:

1. Clone and build the repository as shown in the Installation section
2. Run the server using the commands in the Usage section below

Usage

SQLite Database

To use with an SQLite database:

node dist/src/index.js /path/to/your/database.db

SQL Server Database

To use with a SQL Server database:

node dist/src/index.js --sqlserver --server <server-name> --database <database-name> [--user <username> --password <password>]

Required parameters:

• --server: SQL Server host name or IP address
• --database: Name of the database

Optional parameters:

• --user: Username for SQL Server authentication (if not provided, Windows Authentication will be used)
• --password: Password for SQL Server authentication
• --port: Port number (default: 1433)

PostgreSQL Database

To use with a PostgreSQL database:

node dist/src/index.js --postgresql --host <host-name> --database <database-name> [--user <username> --password <password>]

Required parameters:

• --host: PostgreSQL host name or IP address
• --database: Name of the database

Optional parameters:

• --user: Username for PostgreSQL authentication
• --password: Password for PostgreSQL authentication
• --port: Port number (default: 5432)
• --ssl: Enable SSL connection (true/false)
• --connection-timeout: Connection timeout in milliseconds (default: 30000)

MySQL Database

Standard Authentication

To use with a MySQL database:

node dist/src/index.js --mysql --host <host-name> --database <database-name> --port <port> [--user <username> --password <password>]

Required parameters:

• --host: MySQL host name or IP address
• --database: Name of the database
• --port: Port number (default: 3306)

Optional parameters:

• --user: Username for MySQL authentication
• --password: Password for MySQL authentication
• --ssl: Enable SSL connection (true/false or object)
• --connection-timeout: Connection timeout in milliseconds (default: 30000)

AWS IAM Authentication

For Amazon RDS MySQL instances with IAM database authentication:

Prerequisites:

• AWS credentials must be configured (the RDS Signer uses the default credential provider chain)
• Configure using one of these methods:
  • aws configure (uses default profile)
  • AWS_PROFILE=myprofile environment variable
  • AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY environment variables
  • IAM roles (if running on EC2)

node dist/src/index.js --mysql --aws-iam-auth --host <rds-endpoint> --database <database-name> --user <aws-username> --aws-region <region>

Required parameters:

• --host: RDS endpoint hostname
• --database: Name of the database
• --aws-iam-auth: Enable AWS IAM authentication
• --user: AWS IAM username (also the database user)
• --aws-region: AWS region where RDS instance is located

Note: SSL is automatically enabled for AWS IAM authentication

Configuring Claude Desktop

Direct Usage Configuration

If you installed the package globally, configure Claude Desktop with:

{
  "mcpServers": {
    "sqlite": {
      "command": "npx",
      "args": [
        "-y",
        "@executeautomation/database-server",
        "/path/to/your/database.db"
      ]
    },
    "sqlserver": {
      "command": "npx",
      "args": [
        "-y",
        "@executeautomation/database-server",
        "--sqlserver",
        "--server", "your-server-name",
        "--database", "your-database-name",
        "--user", "your-username",
        "--password", "your-password"
      ]
    },
    "postgresql": {
      "command": "npx",
      "args": [
        "-y",
        "@executeautomation/database-server",
        "--postgresql",
        "--host", "your-host-name",
        "--database", "your-database-name",
        "--user", "your-username",
        "--password", "your-password"
      ]
    },
    "mysql": {
      "command": "npx",
      "args": [
        "-y",
        "@executeautomation/database-server",
        "--mysql",
        "--host", "your-host-name",
        "--database", "your-database-name",
        "--port", "3306",
        "--user", "your-username",
        "--password", "your-password"
      ]
    },
    "mysql-aws": {
      "command": "npx",
      "args": [
        "-y",
        "@executeautomation/database-server",
        "--mysql",
        "--aws-iam-auth",
        "--host", "your-rds-endpoint.region.rds.amazonaws.com",
        "--database", "your-database-name",
        "--user", "your-aws-username",
        "--aws-region", "us-east-1"
      ]
    }
  }
}

Local Development Configuration

For local development, configure Claude Desktop to use your locally built version:

{
  "mcpServers": {
    "sqlite": {
      "command": "node",
      "args": [
        "/absolute/path/to/mcp-database-server/dist/src/index.js",
        "/path/to/your/database.db"
      ]
    },
    "sqlserver": {
      "command": "node",
      "args": [
        "/absolute/path/to/mcp-database-server/dist/src/index.js",
        "--sqlserver",
        "--server", "your-server-name",
        "--database", "your-database-name",
        "--user", "your-username",
        "--password", "your-password"
      ]
    },
    "postgresql": {
      "command": "node",
      "args": [
        "/absolute/path/to/mcp-database-server/dist/src/index.js",
        "--postgresql",
        "--host", "your-host-name",
        "--database", "your-database-name",
        "--user", "your-username",
        "--password", "your-password"
      ]
    },
    "mysql": {
      "command": "node",
      "args": [
        "/absolute/path/to/mcp-database-server/dist/src/index.js",
        "--mysql",
        "--host", "your-host-name",
        "--database", "your-database-name",
        "--port", "3306",
        "--user", "your-username",
        "--password", "your-password"
      ]
    },
    "mysql-aws": {
      "command": "node",
      "args": [
        "/absolute/path/to/mcp-database-server/dist/src/index.js",
        "--mysql",
        "--aws-iam-auth",
        "--host", "your-rds-endpoint.region.rds.amazonaws.com",
        "--database", "your-database-name",
        "--user", "your-aws-username",
        "--aws-region", "us-east-1"
      ]
    }
  }
}

The Claude Desktop configuration file is typically located at:

• macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
• Windows: %APPDATA%\Claude\claude_desktop_config.json
• Linux: ~/.config/Claude/claude_desktop_config.json

Available Database Tools

The MCP Database Server provides the following tools that Claude can use:

Tool	Description	Required Parameters
read_query	Execute SELECT queries to read data	query: SQL SELECT statement
write_query	Execute INSERT, UPDATE, or DELETE queries	query: SQL modification statement
create_table	Create new tables in the database	query: CREATE TABLE statement
alter_table	Modify existing table schema	query: ALTER TABLE statement
drop_table	Remove a table from the database	table_name: Name of table confirm: Safety flag (must be true)
list_tables	Get a list of all tables	None
describe_table	View schema information for a table	table_name: Name of table
export_query	Export query results as CSV/JSON	query: SQL SELECT statement format: "csv" or "json"
append_insight	Add a business insight to memo	insight: Text of insight
list_insights	List all business insights	None

For practical examples of how to use these tools with Claude, see Usage Examples.

Additional Documentation

• SQL Server Setup Guide: Details on connecting to SQL Server databases
• PostgreSQL Setup Guide: Details on connecting to PostgreSQL databases
• Usage Examples: Example queries and commands to use with Claude

Development

To run the server in development mode:

npm run dev

To watch for changes during development:

npm run watch

Requirements

• Node.js 18+
• For SQL Server connectivity: SQL Server 2012 or later
• For PostgreSQL connectivity: PostgreSQL 9.5 or later

License

MIT