For POST requests, what is the purpose of the idempotency key in Stripe?

For POST requests, what is the purpose of the idempotency key in Stripe?

• A. To allow multiple identical requests to create duplicates.
• B. To prevent duplicate operations by recording the first operation.
• C. To set a security token for identity.
• D. To specify a regional endpoint.

Answer: (B)

Idempotency keys are used to prevent duplicate operations when making POST requests. When you create something via Stripe (like a charge or customer), you attach a unique idempotency key to that request. Stripe stores the result of that first operation with that key. If the same request with the same key is sent again—due to a retry, a network hiccup, or a user resubmitting—the system recognizes the key and returns the original response instead of performing the action again. This lets you safely retry requests without risking duplicates, and it’s not about identity security or choosing a regional endpoint.

Idempotency keys are used to prevent duplicate operations when making POST requests. When you create something via Stripe (like a charge or customer), you attach a unique idempotency key to that request. Stripe stores the result of that first operation with that key. If the same request with the same key is sent again—due to a retry, a network hiccup, or a user resubmitting—the system recognizes the key and returns the original response instead of performing the action again. This lets you safely retry requests without risking duplicates, and it’s not about identity security or choosing a regional endpoint.