gabe

Lightweight cron job monitoring. Get alerted when scheduled jobs fail silently.

Website · API · npm

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What it does

Gabe watches your cron jobs. You add a single curl to the end of each job. If the curl stops arriving on schedule, Gabe sends an alert to your webhook (Slack, Discord, or any URL).

No agents to install. No SDK. Just HTTP.

Quick start

# 1. Create an account
curl -X POST https://gabe.usegabe.workers.dev/api/signup \
  -H "Content-Type: application/json" \
  -d '{"email":"you@example.com"}'

# 2. Create a monitor (alerts via Slack webhook)
curl -X POST https://gabe.usegabe.workers.dev/api/monitors \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{"name":"db-backup","interval_minutes":60,"webhook_url":"https://hooks.slack.com/services/..."}'

# 3. Add the ping to your crontab
0 * * * * /usr/local/bin/backup.sh && curl -fsS --retry 3 https://gabe.usegabe.workers.dev/ping/YOUR_MONITOR_ID

That's it. If backup.sh fails or the machine goes down, the curl never fires, and Gabe alerts your Slack within minutes.

API

Base URL: https://gabe.usegabe.workers.dev

Method	Endpoint	Description
POST	/api/signup	Create an account. Body: {"email":"..."}
POST	/api/login	Retrieve your API key. Body: {"email":"..."}
POST	/api/monitors	Create a monitor. Body: {"name":"...","interval_minutes":60}
GET	/api/monitors	List all your monitors.
DELETE	/api/monitors/:id	Delete a monitor.
GET/POST	/ping/:id	Send a heartbeat. No auth required.

Creating a monitor

curl -X POST https://gabe.usegabe.workers.dev/api/monitors \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "name": "nightly-report",
    "interval_minutes": 1440,
    "webhook_url": "https://hooks.slack.com/services/T00/B00/xxx"
  }'

The webhook_url is optional. When a monitor goes down or recovers, Gabe POSTs a JSON payload to your webhook:

{
  "monitor_id": "a3f8x1",
  "monitor_name": "nightly-report",
  "status": "down",
  "minutes_late": 47,
  "message": "\"nightly-report\" hasn't checked in for 47 minutes. Expected every 1440 minutes.",
  "timestamp": "2026-02-18T12:00:00.000Z"
}

Pricing

	Free	Pro ($4/mo)
Monitors	3	20
Check interval	2 min	1 min
Webhook alerts	Yes	Yes
Email alerts	-	Yes

Upgrade to Pro

Self-hosting

Gabe runs on Cloudflare Workers. To self-host:

git clone https://github.com/Scolliq/gabe.git
cd gabe
# Edit wrangler.toml with your account details
wrangler deploy

Requires a Cloudflare account (free tier works).

License

MIT