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What are some common payment system integration protocols?

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If you want to accept online payments from your customers, you need to integrate your website or app with a payment system. A payment system is a network of platforms, services, and protocols that enable the transfer of funds between parties. However, not all payment systems are compatible with each other, so you need to use a specific integration protocol to connect your system with the payment system of your choice. In this article, we will explain what are some common payment system integration protocols and how they work.

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1 Direct API Integration

One way to integrate with a payment system is to use its application programming interface (API). An API is a set of rules and instructions that allow two systems to communicate and exchange data. By using a direct API integration, you can send and receive payment requests and responses directly from your system to the payment system, without relying on any third-party intermediaries. This gives you more control and flexibility over the payment process, but also requires more technical skills and resources to implement and maintain.

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Pooja Arora

Senior Architect (Payments) at Persistent Systems
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Custom Payment Integration solutions provide more flexibility to the enterprise but might not give much RoI, especially to MSMEs. Hence opting for ready-to-use and easy-to-configure COTS solutions is something to analyze for a merchant solution.

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2 Hosted Payment Page

Another way to integrate with a payment system is to use a hosted payment page. A hosted payment page is a web page that is provided and hosted by the payment system, where your customers can enter their payment details and complete the transaction. By using a hosted payment page, you can redirect your customers from your system to the payment system, and then back to your system after the payment is done. This reduces your technical and security burden, as you do not have to handle or store any sensitive payment data on your system.

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3 Payment Gateway

A third way to integrate with a payment system is to use a payment gateway. A payment gateway is a service that acts as a bridge between your system and the payment system, facilitating the communication and processing of payment transactions. By using a payment gateway, you can access multiple payment systems and methods through a single interface, without having to integrate with each one separately. This simplifies your integration and testing process, but also adds an extra layer of cost and complexity.

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Pooja Arora

Senior Architect (Payments) at Persistent Systems
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Payment Gateway solution providers provide omnichannel solutions for a merchant to select from. Current customers need more options to select from while making a payment for a purchase. Providing limited or legacy payment option during the check-out process, can lead to cart abondment. Hence using Payment Gateway solutions can help merchants to offer to their customers, latest and innovative ways to make Payments and ensure customer satisfaction as well as retention.

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4 Payment Switch

A fourth way to integrate with a payment system is to use a payment switch. A payment switch is a software that routes payment transactions from your system to the appropriate payment system, based on predefined criteria and rules. By using a payment switch, you can optimize your payment performance and efficiency, as you can dynamically select the best payment system for each transaction, depending on factors such as cost, speed, availability, and security. However, this also requires more configuration and management on your end.

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Pooja Arora

Senior Architect (Payments) at Persistent Systems
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Payment Switches are solutions aimed at payment processing and may not offer much on customer channel experience. Requirements for implementing complex payment orchestration workflows can be well met using the payment switches aka payment processors.

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5 Payment Aggregator

A fifth way to integrate with a payment system is to use a payment aggregator. A payment aggregator is a service that allows you to accept payments from your customers without having to set up your own merchant account with a payment system. By using a payment aggregator, you can leverage its existing merchant account and integration with various payment systems and methods, and offer a seamless and convenient payment experience to your customers. However, this also means that you have to abide by the terms and conditions of the payment aggregator, and share a portion of your revenue with it.

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6 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?

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What are some common payment system integration protocols?

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1 Direct API Integration

2 Hosted Payment Page

3 Payment Gateway

4 Payment Switch

5 Payment Aggregator

6 Here’s what else to consider

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