Coder Trainee

Jan 11, 2026 · Backend Development

Ensuring API Idempotency: Primary Keys, Optimistic Locks, and Token Strategies

The article explains three practical methods for achieving API idempotency—leveraging unique database primary keys (with distributed IDs), applying optimistic locking via version fields, and using a global anti‑repeat token stored in Redis—detailing their applicability, requirements, and operational flow.