PostgreSQL MCP Server

The PostgreSQL MCP Server gives AI assistants a direct, read-only connection to your PostgreSQL database, enabling natural language queries against your actual data without writing SQL by hand. Connect Claude, Cursor, or another MCP-compatible assistant to your database, and you can ask questions like “which users signed up in the last 7 days,” “show me the top 10 products by revenue this quarter,” or “what’s the average session duration by country” — and get accurate results instantly.

The server handles schema introspection automatically: your AI assistant can see your table structures, column types, relationships, and indexes without you explaining the database schema upfront. This makes it genuinely useful for exploring unfamiliar databases, onboarding to a new codebase, or building data understanding before writing application code.

Read-only access is enforced at the connection level: the MCP server opens a database connection with SELECT permissions only, so there’s no risk of an AI suggestion accidentally mutating production data. For development environments where write access is needed, the server can be configured with a broader role.

Enterprise use cases include connecting BI stakeholders to databases without requiring SQL knowledge, enabling product managers to query data directly, and giving customer success teams self-serve access to account data.

The server is open-source and available on npm. Configuration requires providing a database connection string — typically through environment variables — and adding the server to your MCP client configuration file. It works with any PostgreSQL-compatible database including CockroachDB, Amazon RDS, Neon, and Supabase.