MCP Server Postgres

🚀 PostgreSQL Model Context Protocol (MCP) Server

A Model Context Protocol server that provides read-only access to a PostgreSQL database. This server enables Large Language Models (LLMs) to view the database schema and execute read-only queries.

🚀 Quick Start

The PostgreSQL Model Context Protocol (MCP) Server offers read - only access to a PostgreSQL database, allowing LLMs to interact with the database schema and perform read - only operations.

✨ Features

Tools

• query
  • Execute read - only SQL queries against a connected PostgreSQL database.
  • Input: sql (string): The SQL query to be executed.
  • All queries are executed within a READ ONLY transaction.

Resources

The server provides schema information for each table:

• Table Schema (postgres://<host>/<table>/schema)
  • JSON schema information for each table.
  • Includes column names and data types.
  • Automatically discovered from the database metadata.

💻 Usage Examples

Using with Claude Desktop

To use this server with the Claude Desktop application, add the following configuration to the "mcpServers" section of the claude_desktop_config.json file:

Docker

⚠️ Important Note

• When running Docker on macOS and the server is running on the host network (e.g., localhost), use host.docker.internal.
• Usernames and passwords can be added to the PostgreSQL URL in the format postgresql://user:password@host:port/db - name.

{
  "mcpServers": {
    "postgres": {
      "command": "docker",
      "args": [
        "run", 
        "-i", 
        "--rm", 
        "mcp/postgres", 
        "postgresql://host.docker.internal:5432/mydb"
      ]
    }
  }
}

NPX

{
  "mcpServers": {
    "postgres": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server - postgres",
        "postgresql://localhost/mydb"
      ]
    }
  }
}

Replace /mydb with your database name.

📦 Installation

Docker

docker build -t mcp/postgres -f src/postgres/Dockerfile .

📄 License

This MCP server is released under the MIT License. This means you are free to use, modify, and distribute the software, subject to the terms and conditions of the MIT License. For more details, refer to the LICENSE file in the project repository.