build quickbooks app for online

Summary
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The primary goal for that project is to create an integration from Quick books to our API (JSON).
We need to create a way for quick books user to send parcelow payments links. Parcelow is an electronic payment method with API Json interface.

Flow
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I have an API (JSON) (doc attached).
Buyers access a site and choose Parcelow as payment method.
We convert dollar into Real, the Brazilian currency.
I need to create a quickbooks app that can make Parcelow available as a payment method for this platform.
And that this app would be available for free for many other customers to use.


Note:
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We make the api available for our customers to integrate into their personal websites.
The buyers access these sites and when they make the payment, parcow takes care of the payment approval and notifies the website owner.
But now we need our customers who use the quickbooks platform to be able to use our API there.

if possible, make this solution available in quickbooks' market place so more customers could install this solution in their quickbooks, too.