darenft-labs/mcp-server-postgres

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

• create_table

  • Create a new table in the database
  • Input: table_name (string): Name of the table to create
  • Input: columns (array): JSON schema defining the table structure
  • Creates table if it doesn't exist, errors if table already exists

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

Configuration

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:

NPX

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

Replace /mydb with your database name.

Development

Install dependencies:

npm install

Build the server:

npm run build

Use a local build (repo checkout)

Make sure to run npm run build

{
  "mcpServers": {
    "db-postgres": {
      "command": "node",
      "args": ["/path/to/mcp-server-postgres/build/index.js"]
    }
  }
}

Building

Docker:

docker build -t mcp/postgres . 

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.