Pricing

Pay per usage

Website Change Monitor — Content Diff & Alerts

Monitor websites for content changes. Text diff, hash comparison, CSS selector targeting. Webhook alerts when content changes. Use with Apify scheduling for daily monitoring. 5 URLs free.

Pricing

Pay per usage

Rating

0.0

(0)

Developer

Manchitt Sanan

Actor stats

Bookmarked

Total users

Monthly active users

9 hours ago

Last modified

How it works

First run: Fetches each URL, extracts text content, computes a hash. Saves snapshot.
Subsequent runs: Provide previousDatasetId from the last run. The actor compares hashes and reports which pages changed.
Webhook: If any page changed, POSTs the diff to your webhook URL.

Use with Apify Scheduling (cron) to run daily/weekly and get notified when competitor pages, pricing, or content changes.

Quick start

{
    "urls": ["https://example.com", "https://github.com"],
    "mode": "text"
}

Second run (with comparison):

{
    "urls": ["https://example.com", "https://github.com"],
    "mode": "text",
    "previousDatasetId": "DATASET_ID_FROM_FIRST_RUN"
}

Comparison modes

Mode	What it compares	Best for
`text`	Extracted visible text (no HTML/scripts/styles)	Content changes, blog posts, pricing
`hash`	Full HTML including markup	Any structural change
`selector`	Content inside a specific CSS element	Targeting specific sections (#price, .product-info)

Input

Field	Type	Default	Description
`urls`	array	(required)	URLs to monitor
`mode`	enum	`text`	Comparison mode: text, hash, or selector
`selector`	string	(optional)	CSS selector for selector mode (#id, .class, tag)
`previousDatasetId`	string	(optional)	Dataset ID from previous run for change detection
`timeout`	integer	`15000`	Request timeout per page
`webhookUrl`	string	(optional)	POST alert when content changes
`dryRun`	boolean	`false`	Monitor without charges

Output

{
    "url": "https://example.com",
    "contentHash": "a1b2c3d4e5f6g7h8",
    "textContent": "Example Domain This domain is for use in illustrative examples...",
    "contentLength": 1256,
    "statusCode": 200,
    "checkedAt": "2026-04-14T10:00:00Z",
    "changed": true,
    "previousHash": "x9y8z7w6v5u4t3s2",
    "diff": "Added: New pricing section with updated rates",
    "status": "success"
}

Pricing

$0.003 per URL checked (pay-per-event pricing).

Errors and dry runs are never charged.
100 URLs daily = $0.285/day = ~$8.55/month

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Run on Apify

No setup needed. Click above to run in the cloud. $0.003 per operation.

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