Looking for an API developer for an application that will allow our customers to be able to post or update their credit cards for recurring billing saved on the customer account we have created for them in QuickBooks online.
You don't need to develop anything from scratch. If your company is located in the US, we may recommend a 3rd party subscription management app with the customer portal feature. You can integrate your QB Payment account with it and offering other payment options to your customers. e.g PayPal, Stripe, and others. Contact us in private and we will introduce you directly to them.
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