Pricing

$5.00 / 1,000 page checkeds

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Website Change Monitor

Try for free

Watch any webpage (or a CSS/JSON selector on it) and get a structured text diff when content changes. Keeps state between runs and can alert Slack, Discord, Zapier, Make or n8n. For SaaS pricing pages, prefer Pricing Page Change Monitor.

Pricing

$5.00 / 1,000 page checkeds

Rating

0.0

(0)

Developer

AIBuildersUse

Actor stats

Bookmarked

Total users

Monthly active users

15 hours ago

Last modified

What it does

Watches any URL — marketing pages, docs, ToS, blog posts, competitor landing pages, public JSON APIs.
Optional CSS selector so you only diff the region that matters (main, #content, .terms).
JSON mode flattens API responses into path=value lines for stable diffs.
Auto rendering — plain HTTP first; headless Chromium only when the page looks empty or JS-gated.
Ignore noisy lines with regexes (timestamps, view counters, copyright years).
Webhook with Slack/Discord-compatible text/content fields.

Use cases

Terms of service / privacy policy change alerts.
Competitor landing-page or feature-page monitoring.
Docs and help-center watch for product teams.
Lightweight JSON API change detection.
Compliance / brand mention watches on public pages.

How to use

Add the URLs. Optionally add a CSS selector (global or per URL).
Run once to save a baseline.
Schedule (hourly / daily). Later runs output content_changed rows with added/removed lines.
Optional: add a webhook URL.

Input

Field	Description
`urls`	Pages to watch. Items may include `selector` and `label`.
`cssSelector`	Default CSS selector for all pages.
`contentMode`	`text` (default) or `json`.
`renderMode`	`auto` / `http` / `browser`.
`ignoreTextPatterns`	Regexes to ignore when diffing.
`maxDiffLines`	Cap added/removed lines in each row (default 40).
`includeUnchanged`	Emit `no_change` rows (default on).
`webhookUrl`, `webhookHeaders`	Alert destination.
`stateStoreName`	Snapshot store (default `website-change-monitor-state`).
`maxConcurrency`	Parallel pages (1–10).
`proxyConfiguration`	Optional Apify Proxy.

Example input:

{
  "urls": [
    { "url": "https://example.com/" },
    { "url": "https://news.ycombinator.com/", "selector": "#hnmain" },
    { "url": "https://httpbin.org/json" }
  ],
  "contentMode": "text",
  "renderMode": "auto",
  "ignoreTextPatterns": ["©\\s*\\d{4}"],
  "webhookUrl": "https://hooks.slack.com/services/XXX/YYY/ZZZ"
}

Output

{
  "url": "https://example.com/",
  "checkedAt": "2026-11-06T15:10:00Z",
  "previousCheckedAt": "2026-11-05T15:10:00Z",
  "fetchMethod": "http",
  "changeType": "content_changed",
  "addedCount": 2,
  "removedCount": 1,
  "addedText": ["New headline here", "Updated CTA copy"],
  "removedText": ["Old headline"],
  "lineCount": 18,
  "summary": "Content changed (+2 / -1 lines)"
}

Change types

`changeType`	Meaning
`baseline`	First run: snapshot saved.
`content_changed`	Text/JSON content differs from the previous snapshot.
`no_change`	Checked, identical.
`empty_content`	Loaded but no extractable text.
`selector_not_found` / `fetch_error`	Selector or load failure.

Pricing

Pay per event: $0.005 per page checked. Keep default memory at 512 MB for healthy margins.

Tips

Scope with a CSS selector to cut noise from nav/footers.
Use ignoreTextPatterns for clocks, A/B banners and counters.
For heavy SPAs, set renderMode to browser.
For SaaS pricing pages, prefer Pricing Page Change Monitor. For changelog/status feeds, prefer SaaS Changelog & Status Page Watcher.

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