Is there any way to get a simple count of all unique contacts other than using a GET and returing all individual contact information and have to sum it up that way?
At this time we do not expose a method for retrieving the unique contact count for an account without manually counting them. We do expose the unique counts for each list, but not in aggregate for the account.
Where is the count exposed? I have been working with the list API today and while some of the Coldfusion example code references a count I don't see it in the XML response for the list.
The count of the Contacts in each list is part of the Lists Collection. You can find the documentation on this collection here: http://community.constantcontact.com/t5/Documentation/Retrieving-a-Contact-List-Collection/ba-p/2506...