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

Example Usage with the Desktop App

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

"postgres": {
  "command": "mcp-server-postgres",
  "args": ["postgresql://localhost/mydb"],
  "env": {
    "HOME": "/Users/YOUR_USERNAME"
  }
}

Replace /mydb with your database name and YOUR_USERNAME with your system username.