Accepting UPI by QR is free — but someone has to check the bank app and mark each order paid. UPI Payment Watch does it for you. It runs on the phone that receives your bank's credit alerts, reads each credit SMS or notification, and posts the amount, UTR and payer name to your server over HTTPS within seconds.

Built for real bank messages

Some banks send two SMS for one credit, with different numbers in each. The app merges them into one alert so your server never sees a phantom second payment, and it ignores debits, OTPs and promotions. If your server is unreachable, it keeps retrying — every 15 seconds at first, then every minute, then every 5 minutes until it gets through.

Works with

This store (AllPlugin) accepts it out of the box, and so does the Filantis billing platform. For your own site, the webhook is a simple JSON POST with a bearer token — documentation is included, and the Shop-Script plugin is on the way.