About FastAPI
FastAPI uses Python type hints to generate APIs with automatic validation, serialization, and interactive documentation. One of the fastest Python frameworks.
Key Features
- Type-hint validation
- Auto documentation
- Async support
- Pydantic integration
- OpenAPI generation
- High performance
FastAPI brings modern API development practices to Python. By leveraging Python's type hints, it automatically validates request data, serializes responses, and generates interactive OpenAPI documentation — all without writing schemas separately. Built on Starlette for the web layer and Pydantic for data validation, FastAPI achieves performance comparable to Node.js and Go frameworks while maintaining Python's readability. Its async support handles concurrent requests efficiently, making it suitable for real-time applications and microservices. FastAPI has rapidly become the preferred choice for new Python API projects.