Page Change Monitor
Pricing
from $3.00 / 1,000 vérification effectuées
Page Change Monitor
Surveille une ou plusieurs pages web (contenu entier ou sélecteur CSS précis) et notifie un webhook dès qu'un changement ou un mot-clé est détecté. Conçu pour être planifié en boucle (Apify Scheduler) — revenu récurrent proportionnel à la fréquence de surveillance.
Pricing
from $3.00 / 1,000 vérification effectuées
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Developer
Oussema Toumi
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4 days ago
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Monitors one or more web pages (full content or a precise CSS selector) and notifies a webhook as soon as a change is detected, or when a watched keyword appears/disappears. Designed to run on a schedule via the Apify Scheduler (e.g. every hour, every day) - that is what turns it into a true recurring revenue source instead of a one-shot.
Input
| Field | Type | Description |
|---|---|---|
monitors | array | List of { url, selector? , keyword? } |
webhookUrl | string | URL called with a POST on each notification. Optional: if empty, notifications are only logged. |
notifyOnlyOnChange | bool | If false, also notifies when nothing changed (heartbeat mode) |
Example input:
How it works
- On each run, the actor fetches the content of every page (or of the given CSS selector).
- It compares a hash of the current content with the hash of the last run, stored in the actor's default Key-Value Store (persists across scheduled runs).
- If the content changed (or the watched keyword appeared/disappeared), it
notifies
webhookUrlwith the details, then updates the stored state.
The first run of a new monitor has no previous state, so it is counted as "changed" and triggers a notification - documented behavior, not a bug.
Setting up scheduling
In the Apify Console: Actor → Schedules → Create new schedule, set the
frequency (e.g. 0 * * * * for hourly) and the same Input (monitors +
webhookUrl). This recurring schedule is what generates the recurring revenue.
Pricing (pay-per-event)
check-performed— $0.003 — per URL checked, on every scheduled runchange-detected— $0.01 — additionally, when a change is detected AND the webhook was notified successfully
Example: 5 URLs monitored every hour (720 checks/month), with ~30 detected changes in the month ≈ (720 × $0.003) + (30 × $0.01) = $2.16 + $0.30 = $2.46/month per user monitoring 5 pages - revenue grows with the number of users and monitored pages, with no extra infrastructure cost on your side (everything runs on Apify).
Technical notes
- No GPU required, no external API key required for the base version (no LLM involved).
- A failed fetch for a URL is never charged.
- State is stored under a key derived from
url + selector- two monitors on the same URL with different selectors are tracked independently.
