MarkSort

I'm also interested in automated exports performed locally.

For my credit union, I "reverse engineered" the API and export multiple times throughout the day.

I wrote an extension that exports the data for CapitalOne, but I haven't gotten around to trying it either headless or even just in any automated fashion.

Easy automated export of user data, even beyond financials, is something I'd like to see more of. Feels like it could be a workaround while there's so little decentralization.

Yes, you still have to go through the negotiation. I put together a tutorial for a minimal Node.js Server + Browser Clients example a while back:

https://www.marksort.com/udp-like-networking-in-the-browser/