Adding online payments to a web application can make it easier for customers to purchase products, subscribe to services, book appointments, or pay invoices. But payment integration involves more than adding a payment button to a website.
A reliable integration needs a payment gateway, backend APIs, secure authentication, payment status handling, webhooks, and proper error management.
This guide explains the basic process of integrating a payment gateway into a web application, using Razorpay as an example.
1. Understand How Payment Gateway Integration Works
A typical payment flow looks like this:
