A secure Twilio webhook was built using Python and FastAPI, with the goal of validating incoming requests to ensure they come from Twilio and not malicious third parties. The application uses a virtual environment, ngrok for public access, and a Twilio account to receive SMS messages. A FastAPI framework was chosen due to its high performance, async support, and automatic documentation capabilities. Key features include data validation using Python type hints, automatic handling of form data from the request body, and integration with Uvicorn for ASGI web server functionality. The application also includes a secure signature verification process to prevent unauthorized requests.