Card APIs commonly called credit card bill payment APIs, are a category of application programming interface that allows credit bill payment facility to companies. The API is designed to provide a secure and efficient way for users to manage their credit card bills, and for businesses to offer this functionality to their customers without having to build and maintain a separate payment system. To authorize and process transactions in real-time, communication between a merchant's website, a Bill Payment gateway, and the acquiring bank is made more accessible through card APIs.
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