In the EU, the implementation of an API that offers access to banking data is underway and it will involve all banks, Android Pay as a service will have to comply to it.
Here is some articles worth reading:
https://www.scribd.com/doc/298569302/The-Open-Banking-Standard
https://www.mckinsey.com/industries/financial-services/our-insights/data-sharing-and-open-banking
The European Union is rapidly advancing legislation that will, upon implementation in the next two
years, require UK banks (subject to consent from individuals and businesses) to open access to their
customer data and payments capabilities. The UK has diligently fostered a vibrant financial
technology environment and stands ready to reap the benefits of that legislation sooner than many
other markets. Other markets (in the EU and beyond) have begun to implement aspects of an open
banking standard, but none have produced a definitive outline of such a standard, let alone a
roadmap for its implementation. There is, therefore, a significant opportunity for the UK economy if we
take a lead in this space. This will require that we invest rigorously in development over the next 6-12
months.
...
Regardless of location, over the next 18 to 24 months banks should capitalize on their incumbent advantages by taking the following actions:
Explore data-sharing agreements with fintech and nonfinancial services firms to stay ahead of the curve.
Develop a perspective on APIs and their benefit to the bank’s service
model, both in leveraging mandated third-party access and potentially
extending access beyond statutory requirements.
Fully understand both
existing data privacy mandates and likely changes, and determine
their institution’s appetite for a less conventional approach. And
examine how customer messaging would best facilitate any such change.