# Check-in (cron monitoring)

> A ping a scheduled job sends when it runs, so a monitor can alert when a run is late, missed or failed.

URL: https://pagerless.dev/glossary/check-in
Updated: 2026-10-22

## In Pagerless

`POST /v1/checkins/<job>` or `monitor()` in the SDKs. See [check-ins](https://pagerless.dev/docs/check-ins).

## Related terms

- [Heartbeat monitoring](https://pagerless.dev/glossary/heartbeat-monitoring): Detecting a dead service by expecting a regular signal from it and alerting when the signal stops.