n8n Website Uptime Monitor: HTTP Check + Email Alerts

Know immediately when your website goes down — with an HTTP uptime check and instant email alerts

This n8n workflow monitors a specific website URL by sending an HTTP GET request on a schedule. If the response status code is not 200, it automatically sends a plaintext downtime email (via SMTP) with the URL, status code, and the current timestamp.

What this workflow does

• Runs every 5 minutes using a Schedule Trigger (interval can be changed).
• Reads two key inputs from the Config node: monitorUrl and alertEmail.
• Sends an HTTP request (GET) to the monitored URL and captures the full response details, including the HTTP status code.
• Evaluates the status code with conditional logic: when the code is not 200, it treats the site as “down” or “not healthy.”
• Sends a downtime email using n8n’s Send Email node via SMTP, including: URL, status code, and current timestamp.

Use cases

• Monitor a production SaaS landing page and alert your team if the server returns anything other than 200.
• Check staging or internal services uptime and receive immediate SMTP email notifications.
• Provide lightweight status tracking for an API endpoint without setting up a full monitoring platform.

Technical details

• Schedule Trigger: default check interval every 5 minutes.
• HTTP Request: sends GET request to monitorUrl and reads the HTTP status code.
• if / set: evaluates “status code !== 200” and prepares alert content (URL, status code, timestamp).
• Send Email (SMTP): sends plaintext downtime alerts to alertEmail (supports providers like Gmail, SendGrid, Postmark, or any provider supported by n8n).
• Activation: save and turn on the workflow to run automatically in the background.