Earlier quoted context omitted.
That is disappointing. I wonder if anyone is doing the legal analysis on what it would take to be a 'passthrough provider', who would simply wrap it up in an easier API with a simple TOS.
Teller.io is doing this. You might want to look into what licenses they needed to get.
Edit: And unfortunately, it doesn't seem even to have any intention of using it: https://twitter.com/stevegraham/status/951163378424217600