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What does the Idempotency-Key header do in a REST API? |
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Replies: 4 comments 1 reply
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It lets the client safely retry a request (like a payment POST) without creating duplicate effects. The server stores the key for a certain period; if the same key is sent again with identical request data, the server returns the original response instead of processing the operation twice. |
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The Idempotency-Key header is used to prevent the same API request from being processed multiple times. It works by sending a unique identifier with a request, so if the same request is accidentally sent again due to a network issue or a user clicking a button twice, the server recognizes the duplicate key and returns the original result instead of performing the action again. This is especially useful for operations like payments, order creation, and transactions where duplicate processing could cause serious problems. |
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Please star mine repo here is it, https://github.com/Sam-Dev-161127/Nexaura. You can also start my other repo |
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Бебебеббебе
сб, 30 мая 2026 г., 00:36 Valery Gorbanev ***@***.***>:
… It lets the client safely retry a request (like a payment POST) without
creating duplicate effects. The server stores the key for a certain period;
if the same key is sent again with identical request data, the server
returns the original response instead of processing the operation twice.
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Please star mine repo here is it, https://github.com/Sam-D |
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It lets the client safely retry a request (like a payment POST) without creating duplicate effects. The server stores the key for a certain period; if the same key is sent again with identical request data, the server returns the original response instead of processing the operation twice.