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Stories: Stripe

Diagram of a payment request sent with an idempotency key: the response is lost to a timeout, the client retries with the same key, and the provider returns the stored first result with only one charge.
Payment APIs ·

Idempotency Keys in a Payment API: Retrying Without Charging Twice

How idempotency keys let a payment API call be retried safely, and where Stripe, Adyen, PayPal and Square differ.

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