Indeed. It also seems more like Plaid than ElcomSoft.

If this is indeed like Plaid, a simple clause in the README would put a lot of people at ease (I looked carefully for this before making my comment): This Unofficial API was built with the express written consent of Venmo (or whatever their LLC is called).

It’s an easy thing to add to the README if it’s true. But if it’s not, that’s a problem.

Plaid use screen scraping which is why it breaks all the time. In terms of reverse engineering undocumented but official APIs, you’re thinking of their competitor Teller.