You can use the sources API for both cards and SEPA: https://stripe.com/docs/sources/cards
On the UI side, mind shooting me an email at [email protected]? I can share some stuff we're working on!
while you are talking about SEPA, i know that there is a support for SEPA Direct Debit, but are you thinking about implementing Swiss Direct Debit, right now there are two sub implementation one from Postfinance and one from the Banks, there are talks about combining it in one system in 2 years or so but right now its kinda shitty + i would rather work with stipe api then with camt and pain files.
I know it's in the main Stripe API, but if I'm going to have to roll my own integration, I'm just going to go use PayPal. PayPal has much cleaner API for non-card payments.
With Stripe I need two different codepaths for bank payments and cards....