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Automatic monitoring of multiple URLs with downtime alerts

Oriol SeguíOriol Seguí
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2/3/2026
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This n8n workflow allows you to automatically monitor the status of multiple URLs in a simple and efficient way. You just need to enter the URLs you want to scan and run the workflow (either manually or scheduled). For each URL, an availability check is performed. The results are logged in a Google Sheet, clearly distinguishing between successful checks and failures (downtime). If any URL fails, the system filters these errors and automatically sends an email alert notifying you of the detected outages.

The workflow includes help messages in both English and Spanish, integrates with Google Sheets and Gmail, and is suitable for both one-off tasks and scheduled monitoring.

For Who?

  • Webmasters
  • SEO & Marketing Teams
  • SysAdmins
  • Anyone needing automated website uptime monitoring

How it works?

Enter the URLs to scan in the “URLs” field. Trigger the workflow manually or schedule it to run automatically. For each URL, the workflow: Checks if the URL is online or down. Logs the status (success or error) in a Google Sheet. At the end, filters the failed URLs (crashes) and sends an email alert l

Automatic Monitoring of Multiple URLs with Downtime Alerts

This n8n workflow provides a robust solution for continuously monitoring the availability of multiple URLs and sending immediate email alerts when a website experiences downtime. It simplifies the process of tracking website health, ensuring you are promptly notified of any issues.

What it does

This workflow automates the following steps:

  1. Triggers on a Schedule: The workflow can be configured to run at regular intervals (e.g., every 5 minutes, hourly) to check the status of your monitored URLs.
  2. Reads URLs from Google Sheets: It fetches a list of URLs to monitor from a specified Google Sheet. This allows for easy management and scaling of the monitored websites without modifying the workflow itself.
  3. Iterates Through URLs: For each URL retrieved from the Google Sheet, the workflow performs a separate HTTP request.
  4. Performs HTTP Request: It sends an HTTP GET request to each URL to check its availability.
  5. Checks Response Status: The workflow evaluates the HTTP response status code. If the status code indicates an error (e.g., 4xx or 5xx), it flags the URL as down.
  6. Prepares Alert Data: For any URLs identified as down, it gathers relevant information such as the URL, the error status, and a timestamp.
  7. Consolidates Alerts: All downtime alerts from a single execution are grouped together.
  8. Sends Email Notification: If any URLs are found to be down, a consolidated email alert is sent via Gmail, detailing which URLs are affected and their respective error statuses.

Prerequisites/Requirements

To use this workflow, you will need:

  • n8n Instance: A running instance of n8n.
  • Google Sheets Account: To store the list of URLs you want to monitor.
    • Google Sheets Credential: An n8n credential configured for Google Sheets (OAuth2 recommended).
    • Google Sheet with URLs: A Google Sheet containing a column with the URLs to be monitored.
  • Gmail Account: To send email notifications.
    • Gmail Credential: An n8n credential configured for Gmail (OAuth2 recommended).

Setup/Usage

  1. Import the Workflow:
    • Download the provided JSON file for this workflow.
    • In your n8n instance, go to "Workflows" and click "New".
    • Click the "Import from JSON" button and paste the workflow JSON or upload the file.
  2. Configure Credentials:
    • Locate the "Google Sheets" node and configure your Google Sheets credential.
    • Locate the "Gmail" node and configure your Gmail credential.
  3. Prepare Google Sheet:
    • Create a Google Sheet with a column named URL (or adjust the Google Sheets node to match your column name).
    • Populate this column with the full URLs you wish to monitor (e.g., https://example.com, https://another-site.org).
  4. Configure Google Sheets Node:
    • In the "Google Sheets" node, specify the "Spreadsheet ID" and "Sheet Name" where your URLs are located.
  5. Configure Schedule Trigger:
    • Adjust the "Schedule Trigger" node to your desired monitoring frequency (e.g., every 5 minutes, every hour).
  6. Activate the Workflow:
    • Save the workflow.
    • Toggle the workflow to "Active" to start monitoring.

Once activated, the workflow will automatically check your specified URLs at the set intervals and send email alerts if any downtime is detected.

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