Under maintenance

Pricing

$0.01 / website check run

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Website Change Monitor & Alerter

Under maintenance

Try for free

Monitor web pages for content changes. Track page diffs, get webhook alerts when monitored pages change. Supports CSS selectors for targeting specific sections.

Pricing

$0.01 / website check run

Rating

0.0

(0)

Developer

Richard P

Actor stats

Bookmarked

Total users

Monthly active users

3 days ago

Last modified

How it works

Provide a list of URLs to watch
The Actor fetches each page and computes a content fingerprint (SHA-256 hash)
On each run, it compares against the previously stored fingerprint
If content changed: it generates a diff, records the change event, and optionally sends a webhook alert
If unchanged: quietly records the check (in "all_runs" mode) or skips (in "changes_only" mode)

Features

CSS Selector Support — monitor only a specific part of a page (e.g., #pricing-table, .announcement-bar)
Smart Diffing — generates unified diffs showing exactly what changed
Webhook Alerts — POST change notifications to any HTTP endpoint
Persistent State — fingerprints are stored in Apify's key-value store between runs
Schedule-Friendly — designed for cron/scheduled runs; only alerts on actual changes

Input

Field	Type	Description
`urls`	array	List of URL objects to monitor
`urls[].url`	string	Required. The page URL
`urls[].name`	string	Optional label for the page
`urls[].selector`	string	Optional CSS selector to watch a specific section
`webhookUrl`	string	URL to POST change notifications to
`notificationType`	enum	`"changes_only"` (default) or `"all_runs"`

Webhook Payload

When a change is detected, a POST request with JSON body is sent to your webhook URL:

{
  "event": "page_changed",
  "name": "My Page",
  "url": "https://example.com",
  "changed_at": "2024-01-01T00:00:00+00:00",
  "diff_preview": "--- previous\n+++ current\n@@ -1 +1 @@\n-old content\n+new content",
  "previous_hash": "abc...",
  "current_hash": "def..."
}

Use Cases

Monitor competitor website changes (pricing, features, copy)
Track documentation, terms of service, or policy updates
Watch job postings for new openings
Monitor regulatory or compliance page changes
Detect when a product goes in/out of stock

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