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Amazon Price Monitor

Track Amazon prices, get email alerts on drops, and build historical price charts — all automated.

👁 Amazon Price Monitor

🚀 Overview

Amazon Price Monitor is a powerful Apify actor that scrapes Amazon product pages to extract pricing, ratings, availability, and seller data. It tracks price changes over time, alerts you when prices drop, and helps you make smarter buying decisions.

Use cases:

• 🏪 E-commerce sellers — monitor competitor pricing and adjust your strategy
• 🛒 Savvy shoppers — get notified when wishlist items go on sale
• 📊 Market researchers — build historical price datasets for analysis

✨ Features

💰 Pricing Model (SaaS)

This actor is designed for the Apify Store with a subscription pricing model:

📥 Input

Configure the actor with these parameters:

📤 Output

The actor outputs a dataset of products with this schema:

{
"productName":"Sony WH-1000XM5 Wireless Headphones",
"price":328.00,
"currency":"USD",
"rating":4.6,
"reviewsCount":24580,
"availability":"In Stock",
"asin":"B0C1H6Z3NQ",
"seller":"Amazon.com",
"category":"Headphones",
"url":"https://www.amazon.com/dp/B0C1H6Z3NQ",
"scrapedAt":"2024-01-15T10:30:00.000Z",
"priceHistory":[
{"date":"2024-01-10T08:00:00.000Z","price":348.00},
{"date":"2024-01-15T10:30:00.000Z","price":328.00}
]
}

🏗️ Architecture

┌─────────────┐ ┌──────────────────┐ ┌───────────────┐
│ Start URLs │────▶│ PlaywrightCrawler│────▶│ Dataset │
└─────────────┘ │(Headless Chrom)│ └───────────────┘
 │ │ ┌───────────────┐
 │ • Extract data │────▶│ Price History │
 │ • Price filters │ │(KV Store) │
 │ • Proxy rotate │ └───────────────┘
 └──────────────────┘

🛠️ Local Development

# Install dependencies
npminstall
# Install Playwright browsers
npx playwright install chromium
# Run locally (requires Apify token)
npm start

🔧 Technical Details

• Runtime: Node.js 20+
• Framework: Crawlee + Playwright (PlaywrightCrawler)
• Browser: Headless Chromium
• Proxy: Apify Proxy with residential group support
• Rate Limiting: Automatic retry with exponential backoff
• Selector Strategy: Multi-fallback price selectors for Amazon's dynamic layout

Price Selector Fallbacks

The crawler attempts price extraction in this order:

1. .a-price .a-price-whole + .a-price .a-price-fraction (primary)
2. span.a-price[data-a-size="xl"] span.a-offscreen (deal price)
3. #price_inside_buybox, #priceblock_ourprice, #priceblock_dealprice (legacy)

⚠️ Limitations

• Amazon may block aggressive scraping — use residential proxies and reasonable concurrency
• Price selectors may break if Amazon changes its DOM structure
• Price history is currently in-memory; production deployments should use Apify KV Store

📄 License

Apache 2.0 — see LICENSE