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In modern microservice architectures, network latency, client timeouts, and automated retry policies frequently cause identical payloads to reach a backend server multiple times. Without explicit safeguards, these duplicate submissions can corrupt financial ledgers, spawn duplicate inventory reservations, or break business invariants. Idempoten ...

Understanding HTTP Idempotency HTTP idempotency guarantees that making multiple identical requests produces the same result as a single request. This becomes critical when network failures cause clients to retry opertaions, ensuring that duplicate requests don't alter server state unexpectedly. The HTTP specification classifies methods by their ...