Description: A Payment Gateway Integration API is a set of protocols and tools that allows developers to integrate payment processing services into their applications. These APIs facilitate communication between an application and a payment gateway, enabling secure and efficient transactions. Key features of these APIs include user authentication, transaction management, payment verification, and integration with various payment methods such as credit cards, debit cards, and digital wallets. The relevance of these APIs lies in their ability to simplify the payment process, enhance user experience, and increase transaction security. By using a payment gateway API, businesses can focus on their product and service development, leaving the complexity of payment processing to specialized providers. This not only saves time and resources but also allows businesses to scale their operations more effectively, adapting to the changing needs of the market.