New to this but I am not finding exactly what I am looking for. I have an application in Creator that I want my custom app to send information to. What I am looking for is the steps or an example please.

Custom App in cloud sends json field information for example cust_id, firstname, lastname to any url when custom app triggers an event. I want to see an example of the Creator application that has the fields in the form to receive the information and populate the three fields. I believe my issue might be with the creator url that I am using inside of my custom application. how does one determine the creator url to add a record? I am hoping an example will teach me what I need to know. thank you.