Amazon Price & Stock Monitor + Bulk Product Scraper

Track Amazon product prices and stock status and get alerted only when they change — previous price, change amount, and percent change included, not just a snapshot. Or use it as a plain bulk product scraper by ASIN or search keyword. Built for repricing tools, deal-alert feeds, market research, and inventory monitoring.

What it does

• Monitor mode: give it a list of ASINs (or search keywords), schedule it, and get back only the products whose price or stock status actually changed since the last run — with previousPrice, priceDelta, percentChange, and availabilityChanged on every changed record. The first run for a given ASIN always returns it, to set the baseline.
• Bulk mode: turn monitor mode off and every successfully-read product comes back every run — full product data by ASIN or search keyword, no page-count limit.
• Title, price (with ISO currency code), rating, review count, stock status, Best Sellers Rank, and main image, per product.
• You only pay for products we could actually read. A blocked request, a nonexistent ASIN on that marketplace, or a page we couldn't parse a price or stock status from is never billed — it's reported separately instead.
• Ten marketplaces supported (US, UK, DE, FR, IT, ES, CA, AU, JP, IN), each with the matching proxy country so prices come back in the marketplace's own currency rather than a cross-border conversion.

Output example

{
  "asin": "B088NRLMPV",
  "domain": "www.amazon.com",
  "url": "https://www.amazon.com/dp/B088NRLMPV",
  "title": "Anker USB C to USB C Cable, 60W Fast Charging Cable (2-Pack, 6 ft, Black)",
  "price": 9.99,
  "currency": "USD",
  "priceDisplay": "$9.99",
  "rating": 4.7,
  "reviewsCount": 87379,
  "availability": "In Stock",
  "inStock": true,
  "bestSellerRanks": [{ "rank": 1, "category": "USB Cables" }],
  "mainImageUrl": "https://m.media-amazon.com/images/I/71IE9dLBduL._AC_SL1500_.jpg",
  "scrapedAt": "2026-08-26T12:00:00.000Z",
  "changed": true,
  "previousPrice": 12.99,
  "priceDelta": -3.0,
  "percentChange": -23.09,
  "availabilityChanged": false,
  "previousInStock": true
}

(The last six changed/previous*/*Delta fields only appear in monitor mode.)

Typical uses

• Repricing / competitor tracking — get pinged the moment a tracked ASIN's price moves
• Deal alerts — feed price drops into Slack/email/webhook via a schedule + integration
• Stock monitoring — know the moment a product comes back in stock
• Market research — bulk-pull pricing and rank data across a category by search keyword

Monitor mode

Enable monitorMode and run the actor on a schedule. Each ASIN's price and stock status are remembered per Task; every later run compares against that baseline and returns only what changed. Unchanged products aren't returned and aren't billed.

Why some products don't come back

Amazon is the hardest anti-bot target in this portfolio — a pre-build measurement found automatic/datacenter proxy blocked 94.5% of requests, which is why this actor requires residential proxy (9–18% block rate, in line with what comparable actors report at scale). A blocked or unreadable product isn't silently dropped: it's written to the run's FAILED_ASINS key-value record with a reason (blocked_after_retries, not_found_on_marketplace, no_price_or_availability_data, …) — and none of those are ever billed.

Fair use

This actor collects only public product-listing data — title, price, rating, availability, rank, and the main image. No reviews, no reviewer data, and no seller contact information are collected. No login, no account, no bypassing anything beyond ordinary rate-limiting via proxy rotation. Respect Amazon's terms and local law for your use case.