FastAPI

fastapi.tiangolo.com

High performance, easy to learn, fast to code, ready for production

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FastAPI screenshot
/ About /

FastAPI is a modern, high-performance Python web framework for building APIs, leveraging standard Python type hints for automatic data validation, serialization, and interactive documentation. It is built on top of Starlette and Pydantic, making it one of the fastest Python frameworks available. It is open source and fully compatible with OpenAPI and JSON Schema standards.

/ How it works /

Developers declare API endpoints and data models using standard Python type hints, and FastAPI automatically handles validation, serialization, and generates interactive API documentation.

/ Who it's for /

Python developers building web APIs and backend services

/ More info /

Background.

Status
launched
Business model
open-source
/ Discovered patterns /

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