If you take a look at Magic Login API you will see that we built it on the foundation of making and receiving API calls. We did that to make our integration Universal. Maybe we should have called it "Universal Magic Login API"
Since that ship has sailed, and we recently built "Universal Email Preference Center" we had to focus on Iterable first, Now that Iterable is live, we are working on Making it Universal the same way Magic Login is Universal.
If you are an Enterprize customer and need us to hurry up, this feature can be ready within the month. Set an appointment here if you are interested helping to fund this development.