FastAPI is a high-performance Python web framework designed for building REST APIs. It operates as an ASGI web framework, providing a system to create structured HTTP endpoints that automatically serialize data and validate request parameters.
The framework utilizes Python type hints to drive data validation and serialization, automatically generating machine-readable OpenAPI and JSON Schema specifications. This process enables the automatic creation of interactive, browser-based API documentation where endpoints can be tested directly.
The project includes a dependency injection system for managing shared logic and supports asynchronous request handling and WebSocket communication for real-time data exchange. It also provides tools for API endpoint security through authentication and authorization standards.
Local development is supported via a server with hot reloading, and the framework includes utilities for automated cloud deployment.
