If your endpoint was down or returned an error, the events it missed are not lost. You can resend them from the delivery logs in the webhook portal.
Find the delivery
Open Settings > Developer webhooks and, in the portal, open your endpoint's delivery logs. Each attempt shows its event, the response your endpoint returned, and whether it succeeded or failed.
Replay it
From the logs, replay a single delivery, or replay a range to catch up after an outage. A replay sends the same event to your endpoint again. Mando also retries a failed delivery automatically for a while, so a brief outage often recovers on its own.
Frequently asked questions
Is replay only for developer webhooks?
Yes. Slack destinations have a Test button but do not replay past events.
Will my endpoint see a duplicate?
A replay is a fresh delivery, so design your endpoint to handle the same event more than once.
How far back can I replay?
As far back as the portal keeps delivery history.