Thanks for the shout out! Open Bank Project is an open source API solution for banks. We have a catalogue of 130 standard pre-built banking APIs & 6000 developers worldwide using our interfaces. Also, PSD2 is the hook. There are many more APIs bank can open up which are outside the scope of PSD2.
In any case, Open Banking is definitely a global trend now, there are similar regulation efforts in the making in Australia, Singapore & South Korea.
Feel free to ask, if you have any question on this topic
This is cool. Are there any banks at the moment that expose data using these interfaces?