MCP Servers

PostgreSQL MCP Server

Enables AI agents to inspect and query PostgreSQL databases safely, with features like listing tables, retrieving schemas, and running read-only SQL queries.

README

PostgreSQL MCP Server

A generic Model Context Protocol (MCP) server for PostgreSQL, allowing AI agents to inspect and query PostgreSQL databases safely.

Features

list_tables: List all tables in the public schema.
get_schema: Get the schema (columns, types, nullability) of a specific table.
run_query: Run a read-only SQL query (only SELECT/WITH allowed) with a maximum limit of 100 rows to avoid large responses.

Prerequisites

Python 3.13+
uv
PostgreSQL database

Installation

You can run this directly using uvx or uv run if you clone the repository.

Usage

This server requires the DATABASE_URL environment variable to be set.

Example connection string: postgres://user:password@localhost:5432/mydatabase

Running directly

DATABASE_URL="postgresql://postgres:poggerpogger@localhost:5432/boxboxWeb" uv run main.py

Usage with Claude Desktop / MCP Clients

Add the following to your MCP client configuration (e.g., Claude Desktop's claude_desktop_config.json):

{
  "mcpServers": {
    "postgres": {
      "command": "uv",
      "args": [
        "run",
        "/path/to/2025postgresqlmcp/main.py"
      ],
      "env": {
        "DATABASE_URL": "postgres://user:password@localhost:5432/mydatabase"
      }
    }
  }
}

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