> ## Documentation Index
> Fetch the complete documentation index at: https://www.marqeta.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Idempotency

> This page summarizes how idempotency works in the Marqeta platform.

An idempotent operation is one that has no additional effect if it is called more than once with the same input parameters. All Core API `POST` calls are idempotent capable when the primary token is set in the request object.

For example, if you send a `POST` request to create a resource and don’t receive a response because the card network timed out, you can reissue the same call, with identical content and primary token, and will receive a `201` success response.


## Related topics

- [Error Handling in Europe](/docs/developer-guides/mq-eu-error-handling.md)
- [About Webhooks](/docs/developer-guides/about-webhooks.md)
- [Payment Cards Concepts](/docs/developer-guides/payment-cards-concepts.md)
- [About Powered By Marqeta in Europe](/docs/developer-guides/about-powered-by-marqeta-in-europe.md)