FastAPI is an open-source web framework written in Python programming language for building fast and secure web APIs. It is based on open standards such as OpenAPI (formerly known as Swagger), JSON Schema and OAuth 2.0. FastAPI is designed from the ground up to be performant out of the box and to be extremely easy and quick to use.
The core of FastAPI is based on the ASGI (Async Server Gateway Interface) specification, a standardized interface for accessing web applications. The ASGI allows for improved communication between servers and applications as well as better performance and scalability. FastAPI takes full advantage of this by providing an extensible, event-driven core and several asynchronous components.
FastAPI was designed with speed and usability in mind, allowing developers to quickly create production-ready applications and APIs. In addition, it is based on the open source Starlette library, giving developers access to a powerful set of web features including WebSockets, GraphQL, and more.
FastAPI also provides a wide array of features to further improve the development experience. It provides integrated type checking to ensure objects in the application are of the expected type. It also provides an automatic documentation browser to facilitate the testing process. The documentation validates much of the input and output data, which helps to reduce the time and effort needed to deploy robust applications.
In addition, FastAPI supports a wide variety of databases including PostgreSQL, MongoDB, Redis, and more, and provides integration for authentication protocols such as OAuth 2 and JWT. All of this, combined with its lower memory footprint gives FastAPI a competitive edge over other web frameworks.
Overall, FastAPI is an ideal choice for anyone looking to quickly and easily create secure, powerful, and performant web APIs.
