If a webhook fails with a 5XX error or takes longer than 30 seconds to respond, it will be retried up to two more times. If the error is a 4XX error, the webhook will not be retried.
What happens when a Webhook fails
If a webhook fails with a 5XX error or takes longer than 30 seconds to respond, it will be retried up to two more times. If the error is a 4XX error, the webhook will not be retried.