Question 1

Is there a polling or pull API instead of webhooks?

Accepted Answer

No — v1 is push-only. You register an HTTPS receiver and watchmy.cloud delivers a signed POST the moment a cost rule trips, so there is nothing to schedule or rate-limit on your side.

Question 2

How do I verify a webhook came from watchmy.cloud?

Accepted Answer

Compute HMAC-SHA256 over the timestamp and the raw body with your channel signing secret and compare it constant-time to the X-Watchmycloud-Signature header. Reject timestamps older than about 5 minutes to block replays.

Question 3

What happens if my endpoint is down when an alert fires?

Accepted Answer

watchmy.cloud retries with backoff (1m, 5m, 30m, 2h, 12h) up to 5 attempts, then marks the delivery failed. Every attempt reuses the same alert_event_id, so deduplicate on it.

Question 4

Can I point a webhook at localhost or internal infrastructure?

Accepted Answer

Yes. Delivery is from the notifier worker, not a browser, so private-IP, localhost, and tunnelled (ngrok or VPN) receivers are allowed. HTTPS is still required.

Question 5

Will the webhook payload format change and break my integration?

Accepted Answer

Within schema_version 1 only additive changes ship. Breaking changes go out as schema_version 2 under a new /api/v2 path with a deprecation window, so v1 keeps working. Build your receiver to ignore unknown fields.

Question 6

Which plans include webhooks?

Accepted Answer

All of them. Every notification channel (webhook, Slack, SMS, email) is available on the free trial and every paid plan.

watchmy.cloud
A smoke detector for your AWS bill. Built by engineers who got tired of cost surprises.

watchmy.cloud
A smoke detector for your AWS bill. Built by engineers who got tired of cost surprises.

watchmy.cloud
A smoke detector for your AWS bill. Built by engineers who got tired of cost surprises.

watchmy.cloudA smoke detector for your AWS bill. Built by engineers who got tired of cost surprises.

watchmy.cloudA smoke detector for your AWS bill. Built by engineers who got tired of cost surprises.

watchmy.cloudA smoke detector for your AWS bill. Built by engineers who got tired of cost surprises.

watchmy.cloud
A smoke detector for your AWS bill. Built by engineers who got tired of cost surprises.

watchmy.cloud
A smoke detector for your AWS bill. Built by engineers who got tired of cost surprises.

watchmy.cloud
A smoke detector for your AWS bill. Built by engineers who got tired of cost surprises.