FastAPI is a modern web framework for Python, designed for building fast and efficient APIs. It leverages Python's type hints to provide automatic validation, serialization, and detailed interactive documentation powered by OpenAPI and Swagger. FastAPI is asynchronous by design, enabling it to handle high-performance use cases such as real-time data streaming or machine learning inference. Its developer-friendly features, such as automatic error handling and easy integration with other tools, make it one of the fastest-growing frameworks in the Python ecosystem. FastAPI is an excellent choice for developers seeking speed, reliability, and scalability.