Product Price & Availability Monitor

Track competitor prices and stock without babysitting product pages. This Actor watches a URL or selector, detects meaningful price drops, restocks, and availability changes, and can notify your webhook when something important moves.

Buyer outcome: catch pricing and inventory changes early enough to react, reprice, restock, or route the signal into Slack, Discord, Make, Zapier, or your own backend.

Who buys this

• e-commerce operators tracking competitor pricing and stock
• founders watching suppliers or marketplaces for restocks
• traders and deal hunters monitoring listings
• affiliate marketers tracking offer pages
• teams that need reliable alerts instead of manual checking

What it does

• monitors a full page or a specific CSS selector
• parses price values from visible text
• supports a custom price regex for tricky pages
• ignores noisy page sections before comparison
• keeps persistent state per tracked target
• sends webhook alerts on meaningful price changes

How it works

1. Fetch the page with a browser-like user agent.
2. Strip noisy sections like cookie banners and ads.
3. Extract either the whole page or a target container.
4. Parse the first visible price or use your custom regex.
5. Compare against the stored snapshot from the previous run.
6. Send a webhook if the change is meaningful.

Input example

{
  "url": "https://example.com/product",
  "selector": "main",
  "ignore_selectors": ".cookie-banner,.ads,.promo",
  "min_change_ratio": 0.02,
  "webhook_url": "https://your-endpoint.example/webhook"
}

Output fields

• status
• price_changed
• significant_change
• current_price_value
• previous_price_value
• currency
• percent_change
• message
• final_url

Good use cases

• track competitor price cuts
• detect restock or sold-out flips
• monitor marketplace listings
• catch supplier pricing changes early
• forward changes to Slack, Discord, Zapier, Make, or a backend webhook

Local development

$apify run

Deploy

apify login --token <your-token>
apify push