Monitor Domain expiry and Alert Slack the Moment It Breaks
On a schedule, this checks domain expiry and — only when something is actually wrong — fires a Slack alert with the details, so you hear about problems before your customers do.
- 1
Step 1 — Schedule the check
Add a
Schedule Trigger. Every 5 minutes for uptime; once a day is plenty for expiry checks. - 2
Step 2 — Run the check
Add an
HTTP Requestnode that queries WHOIS/RDAP for the domain expiry date. - 3
Step 3 — Decide if it's a problem
Add an
Ifnode: continue only when the remaining days drop below your threshold (e.g. 21). This keeps things quiet when all is well. - 4
Step 4 — Alert Slack
Add a
Slacknode. SetResourcetoMessageandOperationtoSend. Choose the channel (e.g.#alerts) and drop what failed, the value observed, and a timestamp into the message text using expressions like{{ $json.summary }}. Connect your Slack OAuth or bot-token credential.
Frequently asked questions
How do I avoid alert storms?
Add a "seen" flag or a cooldown so a persistent outage alerts once, not every 5 minutes. n8n's static data or a small store handles this cleanly.
Can I monitor several targets?
Yes — feed a list of URLs/domains into Step 2 and loop, so one workflow covers your whole estate and still alerts Slack per failure.
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