Earlier quoted context omitted.
Isn't there a standard API used in the US? GNU cash talks about it some in their documentation but I've never tried using it.
Nope! US banks seem to have zero interest in doing so because it doesn't bring them money and Congress isn't interested in forcing them to. EU though is working on a solution between themselves. [0] US banks solutions range between "screw off, no scraping allowed even on your account" to (probably) "here's an undocumented SOAP API last touched in 1998" [0]: https://www.americanbanker.com/opinion/europes-new-api-rules…
I know someone claims my bank supports it but I've never tried.