this post was submitted on 14 Oct 2023
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Programming
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https://api.dkb.de/store/site/pages/list-apis.jag
One example
PSD2 is a good search keyword
Thanks. Looks like I'll need to read up and understand PSD2. Every bank seems to have their own implementation of the "standard". At least some like DKB have a swagger.json that allows generating clients in many languages using https://openapi-generator.tech/
There doesn't seem to be an all-encompassing lib for all banks that support PSD2 though (at least not that I can find). For my usecase, just having my bank support it is good enough.
I've done something similar to what you want to do. To avoid the issue with each bank having their own interpretation of PSD2 I ended up using an aggregation service. The few banks I looked at also had horrible APIs, which I didn't really want to work with.
I picked GoCardless for aggregration since it's free for simple transaction reading, but there are plenty of options available.