Java Interview Crash Guide

Mar 22, 2022 · Backend Development

Ensuring API Idempotency: Why It Matters and How to Implement It

This article explains the concept of API idempotency, why duplicate requests can cause critical issues such as double payments, and presents a comprehensive set of client‑side and server‑side strategies—including token mechanisms, PRG pattern, unique indexes, optimistic locking, distributed locks, and more—to guarantee safe, repeatable operations.