Competitor Price Tracker

Monitor competitor product prices on any e-commerce site. Get instant alerts when prices change.

What It Does

This actor takes a list of competitor product URLs, scrapes each one to extract the current price, compares it against the stored price history, and sends alerts when prices change. It works with virtually any e-commerce site including Shopify, Amazon, eBay, Walmart, WooCommerce, BigCommerce, and custom stores.

Features

• Universal Price Extraction - Uses 6 different strategies to find prices on any e-commerce page (JSON-LD, Open Graph, microdata, CSS selectors, Shopify-specific, regex patterns)
• Persistent Price History - Stores up to 30 data points per product across runs using Apify Key-Value Store
• Discord Alerts - Instant notifications to your Discord channel on price changes
• Custom Webhooks - Send price change data to any URL (Zapier, Make, n8n, your own server)
• Threshold Filtering - Only alert when changes exceed a percentage you set
• Stock Monitoring - Detects out-of-stock status changes
• Your Price Comparison - Set your own price to see how competitors compare

Input Example

{
    "urls": [
        {
            "url": "https://competitor-store.com/products/widget-pro",
            "name": "Widget Pro (Competitor A)",
            "expectedPrice": 29.99
        },
        {
            "url": "https://amazon.com/dp/B08N5WRWNW",
            "name": "Widget Pro (Amazon)"
        },
        {
            "url": "https://another-store.com/widget",
            "name": "Widget (Store B)"
        }
    ],
    "discordWebhookUrl": "https://discord.com/api/webhooks/...",
    "alertOnIncrease": true,
    "alertThresholdPercent": 5,
    "proxyConfiguration": {
        "useApifyProxy": true
    }
}

Output

Each monitored URL produces a result object:

Field	Description
url	The monitored product URL
name	Product name (your label or extracted from page)
currentPrice	Current price found on the page
previousPrice	Price from the last run
priceChange	Dollar amount of change
priceChangePercent	Percentage change
alertType	price_drop, price_increase, new_product, out_of_stock, or null
productTitle	Title extracted from the product page
currency	Detected currency (USD, EUR, GBP, etc.)
inStock	Whether the product appears to be in stock
imageUrl	Product image URL
checkedAt	Timestamp of this check
priceHistory	Last 10 price data points

Setting Up Scheduled Monitoring

1. Create the actor run with your product URLs and alert settings
2. Set up a Schedule in the Apify Console:
   • Go to your actor > Schedules
   • Create a new schedule (e.g., every 6 hours, daily, etc.)
   • The actor will compare against the previous run's prices automatically

Discord Integration

1. In your Discord server, go to Server Settings > Integrations > Webhooks
2. Click New Webhook, choose a channel, and copy the webhook URL
3. Paste the URL into the discordWebhookUrl input field

Alerts include the product name, old price, new price, percentage change, and a thumbnail image when available.

Custom Webhook Integration

The actor sends a POST request with this JSON payload:

{
    "source": "apify-price-tracker",
    "alerts": [
        {
            "url": "https://...",
            "name": "Product Name",
            "currentPrice": 24.99,
            "previousPrice": 29.99,
            "priceChange": -5,
            "priceChangePercent": "-16.7%",
            "alertType": "price_drop",
            "currency": "USD",
            "inStock": true
        }
    ],
    "totalChanges": 1,
    "timestamp": "2026-03-20T12:00:00.000Z"
}

This works with Zapier Webhooks, Make (Integromat) HTTP modules, n8n webhook nodes, or your own API endpoint.

Supported Platforms

The price extraction engine handles:

• Shopify stores (all themes)
• Amazon product pages
• eBay listings
• Walmart product pages
• WooCommerce stores
• BigCommerce stores
• Target product pages
• Any site with structured data (JSON-LD, Open Graph, microdata)
• Any site with standard price CSS classes

Price History

Price history is persisted across runs in the Apify Key-Value Store (price-tracker-state). Each product keeps up to 30 data points. The latest summary is available at the latest-summary key.

Tips

• Start with a small list of URLs to verify price extraction works for your target sites
• Use the alertThresholdPercent to avoid noise from tiny price fluctuations (e.g., set to 5 for 5% threshold)
• Schedule runs every 4-12 hours for a good balance of freshness vs. compute cost
• The first run will mark all products as new_product since there is no history yet
• Use Apify Proxy for better reliability, especially with Amazon and Walmart