Website Change Monitor: Text Diffs & Alerts
Under maintenancePricing
$2.00 / 1,000 page checkeds
Website Change Monitor: Text Diffs & Alerts
Under maintenanceMonitor web pages for changes and see exactly what changed: added/removed lines, change %, new links, keyword appear/disappear alerts, Slack-compatible webhooks. CSS selector + regex ignore rules. $0.002 per page check.
Pricing
$2.00 / 1,000 page checkeds
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Developer
Ivan Alvarado
Maintained by CommunityActor stats
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2
Total users
1
Monthly active users
2 days ago
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Website Change Monitor: Track Page Changes with Text Diffs
Watch any public web page and find out exactly what changed: added lines, removed lines, change percentage and new links. The first run stores a baseline. Each scheduled run after that compares against it. Connect a webhook, email, Slack or Zapier integration to get alerts.
Features
- Readable diffs:
addedLinesandremovedLines, not just "changed: true" - Watch part of a page with a CSS selector (e.g.
#pricing,.release-list,table.prices) - Noise control: regex ignore rules (timestamps, counters) and a minimum changed-characters threshold
- Smart default extraction: main content with nav, header, footer and scripts removed
- Keyword alerts:
watchKeywordsreports when words like "sold out", "v3.14" or "deprecated" appear or disappear - Built-in alerts:
webhookUrlPOSTs a JSON summary of changes (with a Slack/Discord-compatibletextfield) to Slack, Zapier, Make or n8n - New-link detection: spot new blog posts, products or documents linked from a page
- Several monitors: separate baselines per
monitorName, stored in your own named key-value store outputOnlyChangeskeeps the dataset empty unless something changed, which is ideal for "notify only on change" workflows
Typical setups
- Competitor pricing pages: selector
#pricing, scheduled daily - Release and changelog pages: watch for new versions
- Terms, privacy and policy pages: compliance monitoring
- Government and regulator notice pages, job boards' "careers" pages, stock or availability text
Input example
Output example (change detected)
status is baseline (first run), changed, unchanged or error.
Pricing (pay per event)
$0.002 per page check ($2 per 1,000 checks). Pages that fail to load are not charged. Checking 10 pages daily costs about $0.60 a month, far less than per-site monitors that charge around $0.10 per check.
Notes
It reads server-rendered HTML and does not run JavaScript, so it's fast and cheap. Pages whose content loads only through JavaScript may show little text, so pick a selector that appears in the server HTML.
