Idempotency

Idempotency refers to the property of an API operation where making the same request multiple times produces the same result as making it once.

In payments, idempotency is critical. If a network disruption occurs while a merchant sends a payment request, they might not receive the response. They can safely retry the request using an Idempotency Key. The Payment Gateway recognizes the key and returns the original transaction result rather than processing a duplicate charge.