I too sold them on the fact that it was not only readonly but push from their side, so my software never accesses their core system directly. I did get one FI t

I too sold them on the fact that it was not only readonly but push from their side, so my software never accesses their core system directly. I did get one FI to implement it, a tiny one branch credit union here in Canada. Though they are tiny they're quite forward thinking. I sit on their board now. I've recently reimplemented (though not deployed for my client yet) the OAuth service in Go and called it Bouncer. It's open source https://github.com/sourdoughlabs/bouncer https://github.com/sourdoughlabs/bouncer There's a Omniauth provider for it too https://github.com/sourdoughlabs/omniauth-bouncer https://github.com/sourdoughlabs/omniauth-bouncer I image a backend for Bouncer that uses OFXConnect would be quite easy to do.... (Both are MIT licensed)