Build a Simple API from Scratch - FastAPI Tutorial for Beginners

Learn to build a complete API from scratch using FastAPI in Python through a practical 22-minute tutorial that uses a real-world delivery scenario between New Jersey and New York. Master the fundamentals of API development by understanding what APIs are through simple analogies involving trucks, bridges, and tomatoes, then progress to hands-on coding where you'll create a functional API server with custom endpoints, path parameters, and async request handling. Explore essential FastAPI features including query parameters for dynamic data processing, inventory management systems, comprehensive error handling, and best practices for production-ready APIs. Set up your development environment using Conda and WSL, then implement and test your API using Uvicorn server while building a custom client application that demonstrates real-world API consumption. Gain practical experience with endpoint creation, asynchronous functions, dynamic inventory updates, and connecting frontend applications to backend services, all while following industry best practices for API design and development.