Cloudsoc API's offers different ways to get the right list of records through the use of the "Filters", this article covers the user case where the objective is to look for the keys that does not have a value set (Empty fields)
The appropriate way to look for empty records is to set the filter key and leave the value unset.
like:
"/?FILTER="
Using user management APIs as an example.
To filter on the user records that do not have a "Secondary User ID" set, use the URI in this format:
"/api/admin/v1/user_management/?secondary_user_id="
The final URL will be something like:
https://api-vip.elastica.net/EXAMPLECOM//api/admin/v1/user_management/?secondary_user_id=