Next-Gen UPI 2.0 & AutoPay Integration Guide (2026): Recurring Subscriptions, NPCI Mandates & Zero-Fee Architecture in PHP & Android
The definitive 2026 developer handbook on architecting UPI 2.0 and NPCI AutoPay recurring subscription systems. Learn deep linking URI standards (upi://mandate), pre-debit notifications, HMAC-SHA256 webhook verification in PHP 8.x, and zero-fee direct merchant settlement on Android and Web.