Shopify Price & Stock Monitor – price drops, restocks & new products

Shopify Price & Stock Monitor tracks the public product catalogue of any Shopify store and reports what changed since your last run: price drops, price increases, back in stock, out of stock, new products/variants and removed products. Schedule it daily to get competitor price alerts, restock alerts or a deal feed – one compact item per changed variant.

• 🛍️ Works on any Shopify store that exposes the standard public /products.json catalogue (most do) – also scoped to a single collection URL
• 🔔 Only changes mode – remembers price and availability for every variant in a named key-value store
• 📉 Previous price, % change, compare-at price and discount %, currency (from the store's public meta.json)
• 🎚️ Filter change types and ignore small price moves (minPriceChangePct)
• No login, no API keys, no browser, no proxies needed for normal use

Input

Field	Description
storeUrls	Store homepages or collection URLs. Empty = demo (https://www.allbirds.com).
onlyChanges	Output only changed / new / removed variants (default on). Off = full catalogue each run, labelled.
outputBaseline	First run of a store outputs all variants as new (default on). Turn off to record silently.
changeTypes	Any of new, price_drop, price_increase, back_in_stock, out_of_stock, removed.
minPriceChangePct	Ignore price changes below this % (default 0).
maxProductsPerStore	Default 2,000 products (each can have many variants).
stateStoreName	Named key-value store with the previous prices – use one name per monitor.

{
  "storeUrls": ["https://www.allbirds.com", "https://shop.example.com/collections/sale"],
  "onlyChanges": true,
  "changeTypes": ["price_drop", "back_in_stock"],
  "minPriceChangePct": 5
}

Output

{
  "store": "https://www.allbirds.com",
  "productId": "7340901859408",
  "variantId": "42146889039952",
  "productTitle": "Women's Allbirds Flip Flop - Dusty Pink",
  "variantTitle": "5",
  "vendor": "Allbirds",
  "productType": "Shoes",
  "sku": "A12513W050",
  "url": "https://www.allbirds.com/products/womens-allbirds-flip-flop-dusty-pink?variant=42146889039952",
  "imageUrl": "https://cdn.shopify.com/s/files/1/1104/4168/files/A12513_26Q2_Allbirds-Flip-Flop-Dusty-Pink_PDP_LEFT.png",
  "currency": "USD",
  "price": 40,
  "compareAtPrice": 50,
  "discountPct": 20,
  "available": true,
  "productUpdatedAt": "2026-11-02T09:39:36-08:00",
  "changeType": "price_drop",
  "previousPrice": 50,
  "priceChangePct": -20,
  "previousAvailable": true,
  "isBaseline": false,
  "detectedAt": "2026-11-03T08:00:00.000Z"
}

If both stock and price change in the same run, the stock change (back_in_stock / out_of_stock) is used as changeType; previousPrice and priceChangePct still show the price move. A RUN_SUMMARY record lists per-store counts.

Use cases

• Competitor price monitoring for e-commerce brands and agencies
• Restock alerts for limited drops (sneakers, collectibles, supplements…)
• Deal feeds – price drops into Slack, Discord, email or Google Sheets via Apify integrations
• Assortment tracking – new and discontinued products of competitors
• Market research – price history built from scheduled runs

Limitations

• Requires the store's public /products.json (some stores disable or password-protect it; those return an error in the run summary).
• Availability is Shopify's public available flag (in stock or not); exact inventory quantities are not public.
• Prices are the store's default-market prices; local-currency/market-specific prices and customer-specific discounts are not shown.
• Very large stores: Shopify serves 250 products per page; raise maxProductsPerStore for catalogues above 2,000 products.

Legal note

The Actor reads only publicly available product catalogue data (product names, prices, availability) that the store publishes to all visitors; it collects no personal data and does not log in or bypass any protection. Keep request rates polite and check each store's terms of service before commercial use.