PostGraphile

PostGraphile creates a GraphQL API directly from an existing PostgreSQL schema, allowing developers to expose their data layer to frontend applications or other API clients without writing custom resolvers. By leveraging PostgreSQL’s role‑based grant system and row‑level security, the generated schema inherits the database’s authorization rules, while features such as auto‑discovered relations, computed columns, and custom query and procedures extend the API’s capabilities.

The tool focuses on performance and type safety, avoiding N+1 query problems through advanced look‑ahead processing and providing automatic CRUD mutations and custom mutation procedures. Real‑time functionality is supported via PostgreSQL’s LISTEN/NOTIFY and logical decoding mechanisms.

PostGraphile is extensible through schema and server plugins, and can be launched quickly with its CLI, for example using npx to connect to a database and enable live watching and enhanced GraphiQL. It targets developers who already use PostgreSQL and want a fast, secure, and maintainable GraphQL server without duplicating business logic.