Dev Tools · 1h ago
Why Payment APIs Must Be Idempotent from Day One
Idempotency ensures a payment request processed multiple times results in only one charge. Without it, network retries can cause duplicate transactions, leading to compliance incidents. The author recommends explicit client-generated UUID keys and durable, atomic storage with a 24-hour TTL.
Meridian48 take
This is a practical, hard-won lesson from the trenches, but the piece understates the complexity of implementing atomic idempotency at scale across distributed systems.
idempotencypayment-apis