Price Drop Tracker - Monitor Any E-commerce Product

Track prices on Amazon, Shopify, eBay, Walmart, Target, Etsy & more. Get alerts when prices drop below your threshold. Monitor stock availability. Schedule daily runs to never miss a deal.

Features

• Multi-platform support - Amazon, Shopify, WooCommerce, BigCommerce, eBay, Walmart, Target, Etsy, and generic e-commerce
• Price history tracking - Persistent price history across runs using named datasets
• Price change alerts - Configurable thresholds for price drops and increases
• Stock monitoring - Get alerts when products go in/out of stock
• Webhook notifications - Send alerts to Zapier, Make, n8n, or custom endpoints
• Browser-based scraping - Uses Playwright for JavaScript-rendered sites

Quick Start

{
  "productUrls": [
    "https://www.amazon.com/dp/B09V3KXJPB",
    "https://www.shopify-store.com/products/example"
  ],
  "historyDatasetName": "my-price-tracking",
  "priceDropThreshold": 5,
  "demoMode": false
}

Demo Mode

Set demoMode: true to test with sample data (no charges, no actual scraping). When you're ready for real results, set demoMode: false.

{
  "demoMode": true,
  "productUrls": ["https://www.amazon.com/dp/B09V3KXJPB"]
}

Input Parameters

Parameter	Type	Default	Description
productUrls	array	required	List of product page URLs to monitor
historyDatasetName	string	"price-history"	Dataset name for persistent price history
alertOnPriceChange	boolean	true	Enable price change alerts
priceDropThreshold	integer	5	Alert when price drops by this % or more
priceIncreaseThreshold	integer	10	Alert when price increases by this % or more
alertOnStockChange	boolean	true	Alert when stock status changes
webhookUrl	string	-	URL to receive alert notifications
maxConcurrency	integer	5	Max pages to process simultaneously
demoMode	boolean	false	Run with sample data (no scraping)

How Price Tracking Works

1. First Run: Scrapes current prices and saves to the history dataset
2. Subsequent Runs: Compares current prices against history, triggers alerts if thresholds exceeded
3. History Dataset: Use a consistent historyDatasetName across runs to enable tracking

Setting Up Price Tracking

{
  "productUrls": ["https://www.amazon.com/dp/B09V3KXJPB"],
  "historyDatasetName": "electronics-tracking",
  "alertOnPriceChange": true,
  "priceDropThreshold": 10,
  "webhookUrl": "https://hooks.zapier.com/hooks/catch/xxx"
}

Schedule this actor to run daily/hourly. It will automatically compare against previous runs and send alerts when prices change.

Output Format

{
  "productUrl": "https://www.amazon.com/dp/B09V3KXJPB",
  "platform": "amazon",
  "productId": "B09V3KXJPB",
  "productName": "Sony WH-1000XM5 Wireless Headphones",
  "currentPrice": 328.00,
  "previousPrice": 399.99,
  "priceChange": -71.99,
  "priceChangePercent": -17.99,
  "compareAtPrice": 399.99,
  "currency": "USD",
  "inStock": true,
  "priceDropped": true,
  "priceIncreased": false,
  "alertTriggered": true,
  "alertType": "price_drop",
  "priceHistory": [
    { "price": 399.99, "date": "2025-01-20T10:00:00Z", "inStock": true },
    { "price": 328.00, "date": "2025-01-22T10:00:00Z", "inStock": true }
  ],
  "scrapedAt": "2025-01-22T10:00:00Z"
}

Alert Types

Alert Type	Description
price_drop	Price decreased by threshold % or more
price_increase	Price increased by threshold % or more
back_in_stock	Product was out of stock, now available
out_of_stock	Product was in stock, now unavailable

Webhook Payload

When alerts are triggered, the webhook receives:

{
  "actorId": "ecommerce-price-monitor",
  "status": "price_alert",
  "alertCount": 3,
  "timestamp": "2025-01-22T10:00:00Z",
  "alerts": [
    {
      "productUrl": "https://...",
      "productName": "...",
      "alertType": "price_drop",
      "previousPrice": 399.99,
      "currentPrice": 328.00,
      "priceChangePercent": -17.99
    }
  ]
}

Supported Platforms

Platform	Detection	Notes
Amazon	URL pattern /dp/ or /gp/product/	US and international marketplaces
Shopify	cdn.shopify.com in page	Any Shopify-powered store
WooCommerce	.woocommerce classes	WordPress + WooCommerce
BigCommerce	bigcommerce.com scripts	BigCommerce stores
eBay	ebay.com domain	Listings and Buy It Now
Walmart	walmart.com domain	Walmart.com products
Target	target.com domain	Target.com products
Etsy	etsy.com domain	Etsy listings
Generic	Structured data (JSON-LD, microdata)	Any site with proper markup

Pricing

This actor uses pay-per-event billing:

Event	Title	Description	Price
product-tracked	Product Tracked	Charged for each product URL that is successfully scraped and price-checked	$0.02
price-alert-triggered	Price Alert Triggered	Charged when a price change or stock status change triggers an alert notification	$0.01

Example costs:

• Monitor 50 products daily: 50 × $0.02 = $1.00/day
• 10 alerts triggered: 10 × $0.01 = $0.10

Demo mode is free (no charges).

Use Cases

• Deal hunting - Get notified when products drop to target prices
• Competitor monitoring - Track competitor pricing strategies
• Inventory alerts - Know when out-of-stock items return
• Arbitrage - Find price differences across platforms
• Dropshipping - Monitor supplier prices for margin changes

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Built by John Rippy | johnrippy.link

2025 Zapier Automation Hero of the Year — Project Phoenix: A 95-step AI sales pipeline cutting development time by 50%.

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