Shopify Product Change Tracker

Monitor any Shopify store and get a clean, machine-consumable feed of change-events — new products, removed products, price changes, and inventory (in/out of stock) flips. Built for scheduled runs + webhooks. Pay per result.

Price-tracking dashboards (Prisync and friends) show you a screen. They don't hand a developer the raw event feed. This actor emits one row per discrete change, in exactly the shape an automation needs:

• product_added / product_removed
• price_changed (with oldPrice, newPrice, priceDelta, pctChange, direction)
• came_in_stock / went_out_of_stock
• compare_at_changed (sale started/ended; nowOnSale)
• title_changed

How it works

• Reads the store's public /products.json endpoint (no login, no anti-bot) across all catalog pages.
• Compares the catalog to the previous scheduled run (state persists in a named Key-Value store between runs).
• Emits only the changes since last run. On the first run it stores a baseline silently (or, optionally, emits the whole catalog as first_seen).

Why it's different

• Event feed, not a dashboard. Every row is a single actionable change with before/after fields — ready for a webhook, Slack alert, reprice bot, or drop-watcher.
• Built on the proven Shopify /products.json scraper with a real diff layer on top.
• In/out-of-stock detection per variant — catch restocks and sellouts the moment they happen.

Input

Field	Type	Description
domains	array	Shopify store domains/URLs to monitor (e.g. allbirds.com).
watch	array	Which change types to emit: added, removed, price, inventory, compareAt, title (default: all).
emitFirstSnapshot	boolean	Emit the full catalog as first_seen on the first run (default off → first run is a silent baseline).
maxPagesPerStore	integer	Catalog pages per store (250 products/page).
proxyConfiguration	object	Apify proxy (recommended).

Example input

{
  "domains": ["aquariumcoop.com", "allbirds.com"],
  "watch": ["price", "inventory", "added"]
}

Output

{
  "shop": "aquariumcoop.com",
  "eventType": "price_changed",
  "productTitle": "Easy Green All-In-One Fertilizer",
  "variantTitle": "8 oz Pump Bottle",
  "sku": "EG-8OZ",
  "oldPrice": "14.99",
  "newPrice": "12.99",
  "priceDelta": -2,
  "pctChange": -13.34,
  "direction": "down",
  "url": "https://aquariumcoop.com/products/easy-green",
  "detectedAt": "2026-06-21T13:40:00.000Z"
}

{
  "shop": "aquariumcoop.com",
  "eventType": "came_in_stock",
  "productTitle": "Fluval 307 Canister Filter",
  "variantTitle": "Default",
  "available": true,
  "price": "189.99",
  "url": "https://aquariumcoop.com/products/fluval-307",
  "detectedAt": "2026-06-21T13:40:00.000Z"
}

Schedule + webhook

1. Schedule the actor (hourly/daily). The first run stores a baseline; from the second run on, every run emits the changes since the last.
2. Add an Apify webhook on run succeeded → your endpoint receives the new change-events. Filter by eventType.

Pricing

Pay per result — charged per change-event row. Steady-state monitoring of a stable catalog is cheap (no changes → no rows). Turn on emitFirstSnapshot only if you want the initial catalog billed as events.

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Built by MoneyMachine. Public /products.json data only; respect each store's terms.