Invoke a 3rd Party API Method

Hello. I am implementing a FAQ Bot which at the end of interactions, if user is not satisfied with the provided answers, Bot must call an API method sending custom variables like name, email, phone and what is the user looking for in FAQ (and couldn't be reply accordingly). This method is a POST 3rd party method already implemented and working, that receives those variables using form data.

Can somebody point me to documentation to get this? I don't need to show response or anything... just send data and the API method will take care of that.

Thanks.