PostgreSQL MCP Server

What it does

The PostgreSQL MCP Server connects your AI coding assistant to a PostgreSQL database, enabling it to explore schemas, inspect table structures, and run read-only queries. This gives the assistant deep understanding of your data model when helping you write application code, debug queries, or design new features.

The server operates in read-only mode by default, executing queries within a transaction that gets rolled back. This makes it safe to use against development and staging databases without risk of accidental data modification.

Use cases

• Explore your database schema to inform AI-assisted code generation for data access layers
• Debug SQL queries by letting the assistant inspect table structures and run test queries
• Generate ORM models, migrations, or TypeScript types based on your actual database schema
• Analyze data patterns by running aggregate queries during development
• Validate that your application queries match the actual table structures

Getting started

1. Prepare your PostgreSQL connection string in the format postgresql://user:password@host:port/database. For local development databases, this is typically postgresql://postgres:postgres@localhost:5432/mydb.
2. Replace the connection string in the install command with your actual database credentials.
3. The server runs queries in read-only mode by default. All queries are wrapped in a transaction that is rolled back after execution.
4. For production databases, create a dedicated read-only database user to add an extra layer of safety. Grant SELECT privileges only on the schemas you want the assistant to access.