Detect when content on a website changes and get notified by webhook or email. Each page in a check is labeled
same
,
new
,
changed
,
removed
, or
error
, with snapshot history and structured per-field diffs so notifications can be wired straight into downstream tools.
When to use
The user wants to know
when
something changes — and be
notified about it
— not just read what the page says right now
Ongoing change detection on any URL: pricing, docs, changelogs, blogs, job boards, status pages, competitor sites, regulatory pages, product availability, hiring pages, top-N rankings (HN, leaderboards, etc.)
"Alert me when...", "notify me when...", "email me if...", "send a webhook when...", "ping me if X changes", "track this page"
Anywhere the user would otherwise wire up cron + a scraper + a diff library + SMTP themselves
Step 5 in the
workflow escalation pattern
search → scrape → map → crawl →
monitor
→ interact
Bias toward
monitor
whenever the request implies notifications or recurrence. A single page read once =
scrape
. A single page where the user wants to be told when it changes =
monitor --page --goal "..." --email|--webhook-url ...
.
Why use a monitor
Show more