How to Implement UPI AutoPay Recurring Payments in Flutter Apps

A technical guide published on DEV Community explains how developers can integrate UPI AutoPay — NPCI's recurring payment system — into Flutter applications. UPI AutoPay allows customers to approve a payment mandate once inside their UPI app, after which merchants can debit their accounts on a scheduled basis without repeated approvals. The implementation requires four Flutter dependencies: http, url_launcher, webview_flutter, and uni_links, each serving a distinct role in the payment flow. A key security recommendation in the guide warns developers never to embed payment gateway credentials inside the Flutter app, instead routing all gateway communication through a backend server. The approach is described as gateway-agnostic, meaning the same Flutter code works across major Indian payment processors such as Razorpay, Cashfree, and PayU.