Security is one of those things every API needs and almost nobody enjoys building. FastAPI makes it far less painful than most frameworks, thanks to built-in support for OAuth2 flows, dependency injection, and automatic docs that even show you a working "Authorize" button. This article walks through building a complete …

When you build an API with FastAPI, almost everything you do boils down to answering one question: how does the client want to talk to me? HTTP gives us several ways to have that conversation, but two verbs — GET and POST — handle the vast majority of real-world traffic. Understanding how …