It's "open" api for some bullshit aggregation data slurping services, not for normal customers to access their data directly and easily for themselves on their own hardware in automated way. There are banks with nice XML/JSON based API specially made for easy syncing and login via API keys you generate in a normal bank web UI. But those are very rare.

If anything EU fucked up all my bank automation, except for this one bank, by requiring 2FA just for logging in, and not only for making transactions.