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🔒 SSL Certificate Monitoring & Expiry Alert with Spreadsheet [FREE APIs]
✅ What This Workflow Does
This n8n template automatically monitors SSL certificates of websites listed in a Google Sheet and sends email alerts if any are expiring within 14 days. It helps ensure you avoid downtime, security issues, and trust warnings due to expired certificates.
🧩 Key Features
- 📅 Weekly Automation: Runs every Monday at 7:00 AM (configurable).
- 📄 Google Sheets Integration: Fetches and updates data in a spreadsheet.
- 🔍 SSL Check via API: Uses ssl-checker.io to get certificate details.
- ⚠️ SSL Expiry Filter: Identifies certificates expiring within 14 days.
- 📧 Email Alerts: Sends notifications for certificates close to expiration.
📂 Input Spreadsheet Format
Your Google Sheet should have the following columns:
| No | Name | Link | SSL Issued On | SSL Expired On | SSL Status |
|---|---|---|---|---|---|
| 1 | Example Site | https://example.com | 2024-07-01 | 2025-07-01 | Valid |
| 2 | My Blog | https://myblog.org | 2024-07-05 | 2024-07-20 | Expiring |
Each row should include a valid website URL in the Link column.
🛠️ How It Works
-
Scheduled Trigger
- Executes weekly (Monday 7:00 AM).
-
Fetch Website List
- Reads all website entries from the Google Sheet.
-
Check SSL Certificates
- Uses
ssl-checker.ioAPI to retrieve certificate details for each website.
- Uses
-
Update Spreadsheet
- Writes "Issued On" and "Expired On" fields back to the spreadsheet.
-
Evaluate SSL Expiry
- Filters for certificates expiring within 14 days.
-
Check Condition
- Determines whether to send alerts based on filtered results.
-
Send Email Alert
- Notifies via email if any certificates are expiring soon.
📬 Example Email Output
Subject: ⚠️ ALERT!! SSL EXPIRED
SSL certificates expiring soon:
- example.com (expires in 5 days)
- anotherdomain.net (expires in 3 days)
🧰 Setup Requirements
- A Google Sheet with the correct columns and website links.
- SMTP credentials to send alert emails.