# Idempotency Keys in Payment APIs: Prevent Double Charges

DevFeed: [Idempotency Keys in Payment APIs: Prevent Double Charges](<https://devfeed.tech/articles/idempotency-keys-in-payment-apis-prevent-double-charges-9920.md>)

Original publisher: [Read original article](<https://dodopayments.com/blogs/idempotency-keys-payment-api/>)

Author: Ayush Agarwal

Published: 2026-07-12T00:00:00Z

Content type: tutorial

Language: en

Sources: [Dodo Payments Blog](<https://devfeed.tech/sources/dodo-payments-blog.md>)

Topics: [API](<https://devfeed.tech/topics/api.md>), [SDKs](<https://devfeed.tech/topics/sdks.md>)

Tags: [api](<https://devfeed.tech/tags/api.md>), [apis](<https://devfeed.tech/tags/apis.md>), [bugs](<https://devfeed.tech/tags/bugs.md>), [chargebacks](<https://devfeed.tech/tags/chargebacks.md>), [engineering](<https://devfeed.tech/tags/engineering.md>), [generate](<https://devfeed.tech/tags/generate.md>), [how-to](<https://devfeed.tech/tags/how-to.md>), [learn](<https://devfeed.tech/tags/learn.md>), [payment](<https://devfeed.tech/tags/payment.md>), [payments](<https://devfeed.tech/tags/payments.md>), [scope](<https://devfeed.tech/tags/scope.md>)

## AI overview

This tutorial explains how idempotency keys prevent duplicate charges in payment APIs by making retries of the same logical operation safe. It covers ambiguous failures, key generation and scope, retry patterns, and implementation details such as time-to-live.

## Source excerpt

How idempotency keys stop duplicate charges in payment APIs. Learn what idempotency means, how keys work, retry-safe patterns, key scope and TTL, and how to implement them correctly.