FastAPI is a modern, high-performance, open-source web framework for building APIs with Python. Created by Sebastián Ramírez and launched in 2018, it leverages standard Python type hints. FastAPI's design emphasizes speed and efficiency, rivaling NodeJS and Go, thanks to its foundation on Starlette and Pydantic. Many organizations, including Uber, Netflix, and Microsoft, use FastAPI.
FastAPI is known for its ease of use, reducing both development time and potential errors. It offers features such as automatic interactive documentation using OpenAPI and JSON Schema. While FastAPI is often used for creating API endpoints, it's versatile and suitable for various web development needs, including serving web pages and building WebSocket applications. It supports asynchronous code, making it well-suited for data science and e-commerce applications. FastAPI is commonly used with Uvicorn as the server.