hostnag

PagerDuty alerts for every outage

hostnag triggers a PagerDuty incident on down and resolves it on recovery.

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Included on Business.

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Down

Action
trigger
Summary
[Critical] https://www.example.com/ is down
Severity
critical
Dedup key
hostnag:mon-3
Source
https://www.example.com/
Group
Client A
Monitor
Marketing site
Target
https://www.example.com/
Down since
12 Sept 2026, 07:58 UTC
Locations
US East, Frankfurt
Status code
503
Last error
unexpected_status: 503
Summary
Down from 2 of 3 locations (US East, Frankfurt). Last error: unexpected_status: 503.

Set up

  1. 01

    Add an Events API v2 integration

    In PagerDuty, add an Events API v2 integration to a service and copy its integration key.

  2. 02

    Paste the routing key

    hostnag triggers on down and resolves on recovery, deduplicated by monitor.

What arrives

Rendered by the same code that sends it.

Back up

Action
resolve
Summary
[Recovered] https://www.example.com/ is back up after 1 h 15 min
Severity
info
Dedup key
hostnag:mon-3
Source
https://www.example.com/
Group
Client A
Monitor
Marketing site
Target
https://www.example.com/
Down since
12 Sept 2026, 07:58 UTC
Duration
1 h 15 min
Summary
https://www.example.com/ answered again from every location. It was down for 1 h 15 min.

Routing

Every alert follows the group's alert policy: which channels a route goes to and the minimum severity each one takes, in bands of critical, warning and info. Quiet hours hold non-critical alerts for email, Slack, Discord, SMS, Teams and Telegram until the window closes, then deliver one digest; critical alerts are never held, and webhook, PagerDuty and Opsgenie always deliver right away since they hand off to another machine, not a person. A maintenance window on a group or a monitor suppresses alerts for its duration while checks keep running. An alert nobody acknowledges escalates through up to three tiers, each after its own number of minutes, and can be acknowledged with one tap from the alert message itself.

Questions

How does hostnag avoid duplicate incidents?

Every event for the same monitor shares one dedup key, so a trigger and its resolve pair up automatically.

Is PagerDuty available on every plan?

No. PagerDuty is included on Business.

Watches

Alerting and status pagesEvery alert routed to the right channel at the right severity, held during quiet hours and maintenance, escalated until it's acknowledged.Uptime monitoringWebsites, APIs and anything that answers on a port, checked every minute from up to four places, with a failure confirmed before anyone is paged.

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