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

# Idempotency

> Safe retry patterns with idempotency keys

# Idempotency

Use idempotency keys to safely retry POST/PUT/PATCH without duplicating operations.

> TODO: document header name and retention window.