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Microsoft SQL Server MCP Server

by RichardHan
GitHub
Python
MIT License
231
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Microsoft SQL Server MCP Server

A Model Context Protocol (MCP) server that enables secure interaction with Microsoft SQL Server databases. This server allows AI assistants to list tables, read data, and execute SQL queries through a controlled interface, making database exploration and analysis safer and more structured.

Features

  • List available SQL Server tables as resources

  • Read table contents

  • Execute SQL queries with proper error handling

  • Secure database access through environment variables

  • Comprehensive logging

  • Automatic system dependency installation

Installation

The package will automatically install required system dependencies (like FreeTDS) when installed through MCP:

pip install mssql-mcp-server

Configuration

Set the following environment variables:

MSSQL_SERVER=localhost MSSQL_USER=your_username MSSQL_PASSWORD=your_password MSSQL_DATABASE=your_database

Usage

With Claude Desktop

Add this to your claude_desktop_config.json:

{ "mcpServers": { "mssql": { "command": "uv", "args": [ "--directory", "path/to/mssql_mcp_server", "run", "mssql_mcp_server" ], "env": { "MSSQL_SERVER": "localhost", "MSSQL_USER": "your_username", "MSSQL_PASSWORD": "your_password", "MSSQL_DATABASE": "your_database" } } } }

As a standalone server

# Install dependencies pip install -r requirements.txt # Run the server python -m mssql_mcp_server

Development

# Clone the repository git clone https://github.com/RichardHan/mssql_mcp_server.git cd mssql_mcp_server # Create virtual environment python -m venv venv source venv/bin/activate # or `venv\Scripts\activate` on Windows # Install development dependencies pip install -r requirements-dev.txt # Run tests pytest

Security Considerations

  • Never commit environment variables or credentials

  • Use a database user with minimal required permissions

  • Consider implementing query whitelisting for production use

  • Monitor and log all database operations

Security Best Practices

This MCP server requires database access to function. For security:

  1. Create a dedicated SQL Server login with minimal permissions

  2. Never use sa credentials or administrative accounts

  3. Restrict database access to only necessary operations

  4. Enable logging for audit purposes

  5. Regular security reviews of database access

See SQL Server Security Configuration Guide for detailed instructions on:

  • Creating a restricted SQL Server login

  • Setting appropriate permissions

  • Monitoring database access

  • Security best practices

⚠️ IMPORTANT: Always follow the principle of least privilege when configuring database access.

License

MIT License - see LICENSE file for details.

Contributing

  1. Fork the repository

  2. Create your feature branch (git checkout -b feature/amazing-feature)

  3. Commit your changes (git commit -m 'Add some amazing feature')

  4. Push to the branch (git push origin feature/amazing-feature)

  5. Open a Pull Request

Deploy Server
A
security – no known vulnerabilities
A
license - permissive license
A
quality - confirmed to work

How are these scores calculated?

hybrid server

The server is able to function both locally and remotely, depending on the configuration or use case.

A Model Context Protocol server that enables secure interaction with Microsoft SQL Server databases, allowing AI assistants to list tables, read data, and execute SQL queries through a controlled interface.

  1. Features
    1. Installation
      1. Configuration
        1. Usage
          1. With Claude Desktop
          2. As a standalone server
        2. Development
          1. Security Considerations
            1. Security Best Practices
              1. License
                1. Contributing

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