Metrics & monitoring
Send Netdata alerts to on-call with CallHeim.
Alarm notification webhook (CRITICAL/WARNING/CLEAR). CallHeim maps the payload, collapses repeats within five minutes, and pages whoever is on call for the service it belongs to.
You build the connection
Netdata has no native outbound webhook for this. It requires a forwarder, script or template that you set up; CallHeim provides the ingest URL and understands the payload shape once it arrives.
Recovery
CallHeim recognises Netdata's recovery payload and closes the incident automatically when it arrives.
Setting it up
Use the custom notification method in health_alarm_notify.conf to POST JSON to the webhook.
Create an Integration in CallHeim and choose Netdata from the Catalog. You get an ingest URL for that integration — paste it into Netdata’s webhook configuration. The snippet beside this is the shape it expects, with {{WEBHOOK_URL}} replaced by your real URL.
If you enable request signing on this integration, CallHeim requires a valid HMAC-SHA256 signature in the X-ItOnCall-Signature or X-Hub-Signature-256 header on every request to it. Without a signing secret, the ingest URL itself is the credential.
CallHeim includes a payload mapping for Netdata’s webhook format, built and tested against sample payloads.
# Netdata → health_alarm_notify.conf → custom notification
# POST JSON to {{WEBHOOK_URL}} with alarm/chart/status/host/info/value.After it arrives
What CallHeim does with Netdata alerts.
Threshold alerts flap at the boundary. Where a source sends a recovery event CallHeim recognises, a series that changes state four times inside ten minutes is grouped instead of re-paging, and the underlying incident stays open and visible.
CallHeim maps Netdata’s own severity to a P1–P5 level and shows a separate, explainable severity suggestion — a published keyword ruleset plus your own resolved-incident history — that a person can apply. How severity is suggested →
Each alert source is bound to a service, and the service’s escalation policy (or its team’s) sets who is paged. Alerting and escalation →
CallHeim closes an incident on a recovery event only for sources whose recovery payload it recognises (or that you map). For the others, a person resolves the incident.
The thresholds it passes through
- Dedup window
- 300s
- Flap threshold
- 4 transitions / 600s
- Title correlation
- similarity ≥ 0.6, same source and service
- Group window default
- 600s
All defaults are published. You can turn title correlation off or change its threshold, and set the window on your own noise rules; the dedup window and the flap settings are fixed. How alerts are processed →
Point Netdata at CallHeim and see what it does with your alerts.
Explore the platform, connect one source, and send yourself a test page by e-mail (early access).
Early access · every workspace starts with a 14-day trial for up to 5 seats, no card required