FastAPI

About FastAPI

Modern, fast (high-performance) web framework for building APIs with Python 3.7+ based on standard type hints. Features automatic API documentation, easy to use, and blazing fast execution.

Key Features

• 1Automatic OpenAPI and JSON Schema documentation from type annotations
• 2Async-first using Python's asyncio for high concurrency
• 3Pydantic model integration for request validation and response serialization
• 4Dependency injection system for database connections and auth
• 5One of the fastest Python web frameworks in benchmarks

How Python Data Engineers Use FastAPI

Data engineers use FastAPI to build data APIs and microservices that serve pipeline outputs or accept data ingestion requests. Defining a Pydantic model as the request body gives automatic validation and OpenAPI docs with zero extra code. FastAPI's async support makes it ideal for services that call databases or external APIs without blocking.