Monitor landing page defacement with Snapshot Site, Discord and email

Description

Quick Overview
This workflow runs every 15 minutes to compare a live landing page against a baseline screenshot using Snapshot Site, and alerts your team via Discord and email when the mismatch indicates possible defacement or hijacking.

How it works
Runs every 15 minutes on a schedule.
Uses Snapshot Site to compare the current landing page URL against a stored baseline screenshot URL and calculates a mismatch percentage.
Checks whether the Snapshot Site comparison returned an API/comparison error and posts a failure message to Discord if it did.
If the comparison succeeds, evaluates the mismatch percentage and treats 30% or higher as an abnormal change.
Sends a defacement alert to a Discord channel and an email recipient in parallel when an abnormal change is detected.
Ends without notification when the mismatch is below the alert threshold.

Setup
Install the n8n-nodes-snapshot-site community node and add Snapshot Site API credentials.
Set the baseline screenshot URL (beforeUrl) and the live page URL (afterUrl), and adjust the mismatch threshold as needed.
Add a Discord Webhook credential and set the target Discord channel for failure and defacement alerts.
Add an SMTP credential and update the from/to email addresses for the defacement email notification.