> For the complete documentation index, see [llms.txt](https://developers.share.inc/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developers.share.inc/getting-started/idempotency.md).

# Idempotency

> **Placeholder page.** Full content will land alongside DEV-853.

All mutating endpoints (`POST`, `PATCH`, `DELETE`) accept an `Idempotency-Key` header. Retrying the same request with the same key returns the original response instead of repeating the side effect.

Use one fresh UUIDv4 per logical operation. Keys are scoped per-partner and retained for at least 24 hours.