web-monitor

name	web-monitor
description	Monitor websites for changes, stock availability, price drops. Use when asked to watch a URL or check for changes.
category	research
maturity	beta
tags	["url-watch","price-drop","stock-alert","cron","ntfy"]

Web Monitor

Check websites for changes and alert via Telegram or ntfy.

Quick URL Check

# Check if page contains text
curl -s URL | grep -qi "SEARCH_TEXT" && echo "FOUND" || echo "NOT FOUND"

# Check HTTP status
curl -s -o /dev/null -w "%{http_code}" URL

# Get page title
curl -s URL | grep -oP '(?<=<title>).*?(?=</title>)'

# Check price (extract number near keyword)
curl -s URL | grep -oP '\d+[\.,]\d+' | head -5

Persistent Monitoring

For repeated checks, create a cron-based monitor:

# Check every 5 minutes
*/5 * * * * curl -s URL | grep -qi "in stock" && curl -d "Item is in stock!" ntfy.sh/YOUR_TOPIC

Check Types

1. text-absent — Alert when text disappears (e.g., "sold out" gone = in stock)
2. text-present — Alert when text appears
3. http-status — Alert on status change
4. price-drop — Alert when price below threshold