FastAPI is a modern, high-performance web framework for building APIs with Python 3.6 and above. It is designed to be easy to learn and develop with, leveraging Python’s type hints to provide automatic validation and serialization of data. FastAPI is built on top of Starlette for the web parts and Pydantic for the data parts, which contributes to its high performance, comparable to frameworks like NodeJS and Go ².

One of the key advantages of FastAPI is its speed of development, which can increase productivity by approximately 200-300%. Additionally, it helps reduce human errors by about 40%, making it a reliable choice for developers ². FastAPI also offers excellent editor support, including autocompletion, which minimizes debugging time and enhances the overall development experience ².

For those interested in building command-line interface (CLI) applications, Typer is a smaller twin of FastAPI designed for that purpose ⁵. FastAPI is suitable for production environments and is widely adopted by various organizations for its robustness and ease of use ⁵.