seenit

Hostile integrations using scripts to obtain financial data is trivial. Frameworks such as:

https://github.com/teampoltergeist/poltergeist

is an excellent example of such a framework. Implementing "bank drivers" using such frameworks would not be difficult.

Plaid and others seem to have done an awesome job scaling the hostile integration pattern. However, the idea that Stripe decided to build this in-house rather than rely on Plaid is perfectly reasonable.

After all, the tools to implement such a product are well known.