How to Add UPI Payments to a Custom Website

Custom sites benefit from a thin server integration: create a payment session, render QR or intent URL, expose a webhook endpoint, and idempotently mark orders complete.

Minimal architecture

• Authenticated API calls from your backend
• Public callback URL with signature verification
• Retry-safe order state machine

Start from the public developer documentation after signup for credential management. VyaparGateway helps you issue dynamic UPI QR codes, verify payments, and notify your stack via webhooks—without charging a per-transaction platform fee on top of your plan.