Healthchecks.io monitors cron jobs and scheduled tasks by waiting for a ping from your script. If the ping does not arrive on schedule, you get an alert. This catches silent failures — the kind where a backup job stops running and nobody notices for weeks. Setup involves adding a simple HTTP request to the end of your script.

It supports integrations with email, Slack, Telegram, Discord, and webhooks. The free tier covers a reasonable number of checks for personal projects. The service is open source and can be self-hosted if you prefer. For developers and system administrators who run automated tasks, it fills a gap that general uptime monitoring does not cover.