FastAPI is a great web framework for creating web APIs with Python; It offers us multiple features with which it is possible to create modular, well-structured, scalable APIs with many options such as validations, formats, typing, among others. FastAPI is a high-performance, easy-to-learn, start-up framework; It is ideal for creating all kinds of sites that not only consist of APIs, but we can install a template manager to return complete web pages. This book is aimed at anyone who wants to learn how to develop their first APIs in FastApi. For those people who know how to program in Python or other web frameworks. For those people who want to learn something new. For people who want to improve a skill and who want to grow as a developer and who want to continue scaling their path in application development with Python.