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    Release Date

    4/1/2025

    about 3 months ago

    Detailed Description

    PostgreSQL

    A Model Context Protocol server that provides read-only access to PostgreSQL databases. This server enables LLMs to inspect database schemas and execute read-only queries.

    Components

    Tools

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

    Resources

    The server provides schema information for each table in the database:

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

    Usage with Claude Desktop

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

    Docker

    • when running docker on macos, use host.docker.internal if the server is running on the host network (eg localhost)
    • username/password can be added to the postgresql url with 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.

    Building

    Docker:

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

    License

    This MCP server is licensed 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, please see the LICENSE file in the project repository.

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