Where can I find a list of Publishers?
To see a report of publishers (sites) on which your campaigns have run, use the Campaign Summary Report, with the
site_breakdowndimension. (Refer to thesitefield in the response.)
To fetch a list of all publishers on which your account could be served, use theallowed-publishersendpoint below. (Returns the full list of publishers, regardless of any publisher blocking. Refer to theaccount_idfield in the response.)