I created a function that does a getURL API call, then pulled out pieces for display using XMLPath functions. I checked the API call, and it's returning data with no problem. However, I cannot get it to display in the custom related list itself (in this case it's under Contacts). I tried returning data using the suggested XML format as mentioned here:
https://www.zoho.com/crm/help/customization/related-lists.html#Use_Third_Party_API and still no luck. Could someone clarify exactly what needs to be returned, ideally with sample code in a string, to make this appear?