PSD2 is really bad. It doesn't actually allow you, the customer, to sign in to your banking account using your own application and an API. It only mandates tha

PSD2 is really bad. It doesn't actually allow you, the customer, to sign in to your banking account using your own application and an API. It only mandates that regulated thirdparty companies can access your banking account using some API. Here in Germany PSD2 was a big step back. Previously we had FinTS (https://en.wikipedia.org/wiki/FinTS https://en.wikipedia.org/wiki/FinTS), an open banking protocol used since the last 90s, and many programs supporting it. Then PSD2 came and broke some use cases of FinTS. Many banks didn't want to both fix FinTS and support new PSD2 APIs, so they just switched off FinTS. Now German bank customers are basically forced to use the banking website because PSD2 doesn't allow them to use an API and the API they had was taken from them by PSD2.