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Self-hosted monitor that watches cron/batch jobs via heartbeat pings, catches MISSED / LATE and sends alerts (SMTP email + webhook + guaranteed log). Zero-dependency, self-hosted — simpler than Healthchecks.io.
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Zero dependencies: No npm packages or external services needed — only Node.js ≥ 20. Works behind a reverse-proxy or locally.
Heartbeat pings: Each job gets a secret ping URL; your cron just runs curl https://host:3310/ping/<token> (GET or POST).
Accurate detection: States pending → up → late → missed. A job that misses its ping within interval + grace period is marked MISSED; a late ping is marked LATE.
Alerts on state changes: SMTP email (STARTTLS/TLS, AUTH LOGIN/PLAIN — all built-in), webhook with JSON payload, and always-on log channel. No spam — alerts only on state change.
Clear dashboard: Create/edit checks, manual "Test ping", live status, event feed.
REST API for automation: GET/POST /api/checks, ping, toggle, events.
Configure via env or UI: HOST, PORT, BASE_URL, SMTP settings.
Simpler than Healthchecks.io: One file node server.js — fully self-hosted, no cloud registration, full control over your data.
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