Theres quite a few examples, it's a space where banks are trying to hold ground against fintechs, or they'll be forced to partner with them

One example i can think of right off the top of my head: INTEGRATIONS Integrate Increase APIs Modern Treasury’s powerful REST API is the easiest way to integrate your Increase bank accounts with your application for payments, reconciliation and reporting. https://www.moderntreasury.com/integrations

And

"Improve Cash Flow

Managing cash flow requires looking at receivables and payables, accessing liquidity and making accurate forecasts. Cash management APIs improve every facet of the treasury operations." https://www.chase.ca/en/support/insights/six-ways-payment-ap....