2 results
2026-04-27 Webhook Registration Endpoint Event subscription Test send
How to register a Webhook

Register a webhook in the developer portal or through the API, choose events that are actually sent, run a test send, and change, pause or delete a webhook.

2026-04-27 Webhook Retry Idempotency Ordering X-RR-Delivery
Designing resends, ordering, and idempotency

What counts as success, the retry rules (1 min, 10 min, 1 h, four attempts), ordering and lost events, and dropping duplicates by X-RR-Delivery.