I want Bank and Purchases API.

Hi Vegan Dukan!

It seems that you want to integrate QuickBooks Online with other applications. We have a separate public space for developers who can help you with your API concerns.

You may visit https://developer.intuit.com/. If you haven't yet, you can create an account so you can start interacting with other developers.

Post again here if you need anything else. We'll respond as soon as we can.