Learn how to add POST API support to a Python FastAPI application using class-based parameter parsing. Explore techniques for developing a flexible Python class to handle POST parameters directly, processing those parameters, and sending responses back to clients. Follow along as the video demonstrates adding a POST handler, creating a query parameter handler class and function, testing with the FastAPI debugger, parsing POST request parameters, generating query-based responses, and calling the API using cURL. Access the complete source code on GitHub to enhance your FastAPI development skills.