Our engineers have moved in a different direction regarding our survey product and our API. At this time this is not something we are looking to implement. If this changes we will make sure to announce it to our customers and release that information on our developer site.
So, just to get an update..
is there any OTHER way to get a list of who responded to a survey? I want to automate sending an attendance certificate to those who completed a survey and attended a class.
If you are using our survey product you would need to manually export a csv file. There are no plans to add the survey product to the v2 API.