This is true for even some small-town banks. I switched to Windows Phone last year and built a personal banking app that would display my financial details on a live tile. While using Fiddler to figure out the necessary API calls, I discovered that my tiny bank's Android and iOS API was actually provided and maintained by a much larger bank.
It turns out that the bigger bank has dozens of smaller banks using the very same API, and its a trivial matter of switching a URL slug to make my makeshift API work for these other banks.
It was an interesting learning experience, but I did manage to get myself locked out of my own bank account a few times while replicating the login process.
It turns out that the bigger bank has dozens of smaller banks using the very same API, and its a trivial matter of switching a URL slug to make my makeshift API work for these other banks.
It was an interesting learning experience, but I did manage to get myself locked out of my own bank account a few times while replicating the login process.