Monitor SSL certificate expiry and Alert PagerDuty the Moment It Breaks
On a schedule, this checks ssl certificate expiry and — only when something is actually wrong — fires a PagerDuty 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 inspects the TLS certificate and reads its 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 PagerDuty
Add an
HTTP Requestnode that POSTs to the PagerDuty Events API v2 with what failed, the value observed, and a timestamp as the summary, so an incident is opened automatically.
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 PagerDuty per failure.
Alert on Cold Chain Temperature Excursions Before Product Spoils
A cold chain excursion discovered at delivery means spoiled product and rejected shipments. Monitor temperature loggers in transit and alert the moment any reading breaches limits.
n8nSlackTwilioSend a Daily Google Analytics Digest to Slack Every Morning
Each morning this pulls yesterday's numbers from Google Analytics, formats them into a readable digest, and posts it to Slack — so the whole team starts the day on the same page without opening a dashboard.
n8nSlack
Log Pool Chemical Readings and Alert on Out-of-Range Levels
Keep pools safe by logging each visit's chemical readings and instantly alerting the office when levels fall outside the safe range.
n8nGoogle SheetsSlack