Page Change Monitor
Pricing
from $1.50 / 1,000 results
Page Change Monitor
Monitor web pages for content changes. Diffs each run against the previous snapshot and emits structured change records with added/removed lines — ideal for price, job, docs, and competitor monitoring.
Pricing
from $1.50 / 1,000 results
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Developer
Cynix Dev
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1
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a day ago
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Watch any set of public web pages for content changes. Every run compares each page against its previous snapshot and emits a structured change record — including added/removed lines — so you know exactly what changed, not just that something changed.
Schedule it hourly or daily on Apify, wire the dataset into a webhook, Slack, or your own pipeline, and you have a monitoring SaaS in one Actor.
Use cases
- Price monitoring — watch competitor pricing pages (use
cssSelector: ".price"). - Job monitoring — get diffs when a careers page changes.
- Competitor intel — track feature pages, changelogs, terms of service.
- Docs/compliance — know when a policy or API doc is edited.
- Content QA — detect unexpected changes on your own pages.
How it works
- Fetches each URL and extracts content (readability main-content by default, or a specific CSS selector).
- Normalizes to Markdown and hashes it.
- Compares against the snapshot stored in a named key-value store.
- Emits one record per URL:
first_snapshot,unchanged, orchanged(with+/-line counts and the actual diff text). - Stores the new snapshot for the next run.
Output record
| Field | Description |
|---|---|
url, title | Monitored page |
status | first_snapshot / unchanged / changed / error |
diffSummary | Human-readable summary, e.g. +12 / -3 lines vs 2026-07-26T… |
addedLines / removedLines | Change magnitude |
diffAdded / diffRemoved | The actual changed lines (capped by maxDiffLines) |
contentHash, previousHash | For your own dedup logic |
checkedAt, previousCheckedAt | Timestamps |
Tips
- Keep
mainContentOnly: trueto avoid false positives from rotating ads/nav. - Use separate
snapshotStoreNamevalues for independent monitors. - Chain with Apify Schedules + webhooks for real-time alerting.
Compliance
Public pages only. No logins, no paywall bypass, no personal-data collection.
