n8n Workflow: Monitor Landing Page Defacement (Snapshot)

Detect landing page defacement by comparing snapshots every 15 minutes

This n8n workflow continuously monitors a landing page for visual changes that may indicate defacement or hijacking. It compares your live page against a trusted baseline using Snapshot Site, then automatically alerts your team via Discord and email when a mismatch looks abnormal.

What this workflow does

• Runs on a schedule every 15 minutes to keep monitoring current.
• Compares live vs. baseline screenshots using Snapshot Site by providing a stored baseline URL (beforeUrl) and the live landing page URL (afterUrl).
• Handles Snapshot Site errors by checking whether the comparison returned an API/comparison error, then posting a failure message to Discord.
• Evaluates mismatch percentage when the comparison succeeds.
• Triggers alerts on abnormal changes: if the mismatch is 30% or higher, it treats the change as abnormal and sends notifications.
• Notifies in parallel: posts a defacement alert to a Discord channel and sends an email to your chosen recipient.
• Stays quiet when safe: if the mismatch is below the threshold, it ends without notification.

Use cases

• SaaS operators monitoring marketing/lead-gen landing pages for unauthorized changes.
• Security-minded teams that want early visual tamper detection beyond traditional uptime checks.
• Automation engineers who need a practical n8n alerting workflow using Snapshot Site comparisons.

Technical details

• Nodes / logic: schedule trigger, if, no op, discord, email send, sticky note.
• Core integration: Snapshot Site via the community node n8n-nodes-snapshot-site using Snapshot Site API credentials.
• Alerting: Discord Webhook credential for Discord alerts; SMTP credential for email notifications.

Setup in minutes

Configure beforeUrl (baseline screenshot) and afterUrl (live page), set the mismatch threshold if needed, add Discord webhook and SMTP credentials, and deploy the workflow for automated landing page defacement monitoring.