We are using the Constant Contact API over REST to add contacts to contact lists and update their details. Recently we switched the authentication to Basic over HTTPS and we would like a confirmation if it is the right approach:
We are specially worried about the third point. Is this correct? Or should we change the IDs to the "http" form too (the update contact method didn't work like this).
You are correct, it does not require any change to the URIs in the XML documents. The only change which needs to be made are the posted to URIs.