UPI APIs are REST endpoints linking apps, banks, and NPCI for real-time transfers — request amount/PIN, get success or webhook callback.

How fast are UPI API transactions?

Under 2-3 seconds end-to-end, routing payer PSP to NPCI to payee, with 14B+ monthly volumes at 99.99% uptime.

Why use idempotency keys in payment APIs?

They prevent duplicate charges on retries — same txnId, server ignores repeats, saving banks from double-debits.

🗄️ Databases & Backend

That instant ₹100 UPI ping? APIs make it happen across rival banks. Here's the data-driven breakdown of the tech fueling India's payment revolution.

theAIcatchup Apr 08, 2026 3 min read

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#Microservices Scaling #NPCI #Payment Flows #REST APIs #UPI API #microservices #payment systems

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Originally reported by dev.to