SSL Expiry Alert System

Name: SSL Expiry Alert System
Rating: 5 (5 reviews)
Author: Free N8N

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IT OperationsAlertingGmailGoogle SheetsMonitoringSSLSecurityTelegram

Proactively monitors SSL certificate expiry dates and sends alerts.

About This Workflow

This workflow automates the monitoring of SSL certificates for a list of URLs. It fetches URLs from a Google Sheet, checks their SSL status using SSL-Checker.io, updates the sheet with certificate details, and sends timely alerts based on expiry dates or invalid certificates. Ideal for IT professionals to prevent service disruptions due to expired SSL certificates.

Key Features

Weekly automated SSL certificate checks.
Data source configurable via Google Sheets.
Real-time SSL status verification using SSL-Checker.io.
Detailed SSL information retrieval (host, validity, days remaining).
Dynamic alert categorization: invalid, warning (<30 days), notice (<60 days), and info.
Multiple alert notification channels: Gmail and Telegram.
Updates Google Sheet with SSL check results.

How To Use

Google Sheet Setup: Create or clone a Google Sheet with a 'URL' column containing the websites to monitor. Update the Fetch URLs and URLs to Monitor nodes with the correct Document ID and Sheet Name/GID.
Credentials Setup: Configure your Google Sheets OAuth2 credentials in n8n. Set up your Gmail OAuth2 credentials for sending alerts.
Trigger Configuration: The Weekly Trigger node is set to run weekly. Adjust the interval and triggerAtDay/triggerAtHour as needed.
SSL Checker API: The Check SSL node uses SSL-Checker.io. Ensure the URL format is correct. The workflow dynamically constructs the API endpoint URL.
Alerting: The Switch node categorizes SSL statuses. Configure the Send Alert Email nodes (Gmail) and Telegram node with your preferred recipients and message content. The Ntfy4 node can be used for additional notifications.
Workflow Activation: Ensure the workflow is set to 'Active' to start the monitoring process.

Apps Used

Alerting

Gmail

Google Sheets

Monitoring

SSL

Security

Workflow JSON

{
  "id": "88288580-90db-492b-ae38-1e50ac98b572",
  "name": "SSL Expiry Alert System",
  "nodes": 22,
  "category": "IT Operations",
  "status": "active",
  "version": "1.0.0"
}

Note: This is a sample preview. The full workflow JSON contains node configurations, credentials placeholders, and execution logic.