Webhook delivery is at-least-once: Nomos guarantees every event reaches your endpoint, but the same event can arrive more than once and not always in order. Build your handler around three rules:Documentation Index
Fetch the complete documentation index at: https://docs.nomos.energy/llms.txt
Use this file to discover all available pages before exploring further.
- Slow responses fail. Nomos waits 30 seconds for a
2xx. Hand long work to a background queue and acknowledge immediately. - Duplicates can happen. The same event
idcan arrive more than once, so make your handler idempotent: store processed IDs and skip them on repeat deliveries. - Order is not guaranteed.
subscription.confirmedmay land beforesubscription.created. Process events independently and fetch the resource when you need current state.
Retry schedule
A non-2xx response or a timeout triggers exponential backoff: up to 12 attempts over roughly 3 days, after which the delivery is dropped.
| Attempt | Delay |
|---|---|
| 1 | 1 minute |
| 2 | 2 minutes |
| 3 | 4 minutes |
| 4 | 8 minutes |
| 5 | 16 minutes |
| 6 | 32 minutes |
| 7 | 1 hour |
| 8 | 2 hours |
| 9 | 4 hours |
| 10 | 8 hours |
| 11 | 16 hours |
| 12 | 32 hours |
Looking up past events
Every event Nomos sends is stored. To inspect a delivery after the fact, retrieve it byid with Retrieve an event. The response uses the same envelope as the webhook payload.