How do I use HTTP Endpoints to test bot?

I have created a simple chatbot using RASA Open Source and I am having some issues with testing it. I am trying to utilize HTTP Endpoints and be able to use get and post requests in order to simulate a conversation between a user and a bot. If I use a post request to mimic the user’s requests, I am confused on how I can use that information to get the bot to read it, file it in the appropriate intent and also respond to it.

Thanks so much!