Getting Active Client Count Per AP

We are trying to get the number of active client on a per AP basis.

However, it seems that we are not able to identify the specific API to use for the retrieval of "Number of Active Client Per AP".

The number is derived from using this API

and counting the number of records for each unique "apMacAddress": "3c:08:f6:d9:08:a0",

I don’t see a single API that will pull just the number of devices per AP, instead, you add the tag apList=TRUE at the end of the client get API.