> For the complete documentation index, see [llms.txt](https://docs.aviowiki.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.aviowiki.com/webhooks/delivery-and-retries.md).

# Delivery and retries

Webhook deliveries are queued and processed reliably:

* Your endpoint must respond with a **2xx status code** within **30 seconds** to acknowledge receipt
* Failed deliveries are retried up to **4 times** with increasing delays: **1 min → 5 min → 15 min → 60 min**
* After 5 total attempts (1 initial + 4 retries), the delivery is marked as permanently failed
* Delivered entries are automatically cleaned up after 30 days

{% hint style="success" %}
Always return a 200 response quickly, then process the webhook payload asynchronously. This prevents timeout-related retries.
{% endhint %}