Re: Retrieve constant contact account id via v3 api
Thank you for reaching out to Constant Contact API Developer Support.
We are still in the process of building out the feature set of our V3 API. As of right now there aren't any account summary endpoints that would provide you with this information, however we are hoping to have these included in our release at the end of May or beginning of June. Obviously I can't guarantee that, but that is currently what we are shooting for.