To get notified when a webpage changes, run a small script on a schedule that fetches the page, compares it to the last version, and calls your Hook.Notifier URL when something is different. You get a push notification the moment it changes.
The watcher script
This fetches a page, stores a hash, and pings you when the hash changes.
#!/bin/bash
URL="https://example.com/the-page"
NEW=$(curl -s "$URL" | md5sum | cut -d' ' -f1)
OLD=$(cat /tmp/page.hash 2>/dev/null)
if [ "$NEW" != "$OLD" ] && [ -n "$OLD" ]; then
curl -s "https://hooknotifier.com/{IDENTIFIER}/{KEY}?object=Page%20changed&body=${URL}"
fi
echo "$NEW" > /tmp/page.hash
Run it on a schedule
Check the page every ten minutes with cron.
# crontab -e
*/10 * * * * /home/me/watch-page.sh
The moment the page changes, your phone lights up.
Watching without the buzz
Some pages change often and none of it is urgent. Append &priority=low to the hook URL in the script and the changes pile up quietly in your inbox instead of pushing to your phone. You check them when you want, nothing wakes you.
First get your URL
Your Hook.Notifier URL is https://hooknotifier.com/{IDENTIFIER}/{KEY}. Create a free account to get yours, then drop it into the script.
Why it matters
A price drop, a spot opening in a class, a job going live, a competitor updating their page. These reward whoever sees them first. A watcher script plus a notification means you are first without refreshing a tab all day.
New to this? Start with how to send yourself a native push notification.