Good day, argoda.

We do have a separate forum for API concerns in QuickBooks Online.

You can explore our Intuit Developer website and look for resources about allowing customers to update and post their credit cards with recurring billing in QBO.

You can also visit the Firm of the Future site. From there, you can be updated with the features and enhancements that our developers are currently working on.

You can always get back to this thread if you have any other concerns. I'll be right here to help.