Description: An Instant Payment API is an application programming interface that allows developers to integrate real-time payment processing solutions into their platforms. These APIs facilitate fast and secure transactions, eliminating the need for manual processes or intermediaries that may delay payment confirmation. Key features of an Instant Payment API include the ability to execute transactions in milliseconds, integration with multiple payment methods (such as credit cards, digital wallets, and bank transfers), and the implementation of advanced security measures to protect user information. Additionally, these APIs often offer extra functionalities such as subscription management, transaction reporting, and automatic payment reconciliation. The relevance of these APIs lies in their ability to enhance user experience, increase operational efficiency for businesses, and facilitate e-commerce, especially in a world where immediacy is increasingly valued by consumers.