# Shopify Catalog Monitor — Price & Stock Change Alerts (`dizzyvinci/shopify-catalog-monitor`) Actor Track price drops, stock-outs, restocks, and new/removed products across any public Shopify store. Schedule it and receive only the diffs. - **URL**: https://apify.com/dizzyvinci/shopify-catalog-monitor.md - **Developed by:** [Dizzy Vinci](https://apify.com/dizzyvinci) (community) - **Categories:** E-commerce, Automation, Marketing - **Stats:** 2 total users, 1 monthly users, 100.0% runs succeeded, NaN bookmarks - **User rating**: No ratings yet ## Pricing Pay per usage This Actor is paid per platform usage. The Actor is free to use, and you only pay for the Apify platform usage, which gets cheaper the higher subscription plan you have. Learn more: https://docs.apify.com/platform/actors/running/actors-in-store#pay-per-usage ## What's an Apify Actor? Actors are a software tools running on the Apify platform, for all kinds of web data extraction and automation use cases. In Batch mode, an Actor accepts a well-defined JSON input, performs an action which can take anything from a few seconds to a few hours, and optionally produces a well-defined JSON output, datasets with results, or files in key-value store. In Standby mode, an Actor provides a web server which can be used as a website, API, or an MCP server. Actors are written with capital "A". ## How to integrate an Actor? If asked about integration, you help developers integrate Actors into their projects. You adapt to their stack and deliver integrations that are safe, well-documented, and production-ready. The best way to integrate Actors is as follows. In JavaScript/TypeScript projects, use official [JavaScript/TypeScript client](https://docs.apify.com/api/client/js.md): ```bash npm install apify-client ``` In Python projects, use official [Python client library](https://docs.apify.com/api/client/python.md): ```bash pip install apify-client ``` In shell scripts, use [Apify CLI](https://docs.apify.com/cli/docs.md): ````bash # MacOS / Linux curl -fsSL https://apify.com/install-cli.sh | bash # Windows irm https://apify.com/install-cli.ps1 | iex ```bash In AI frameworks, you might use the [Apify MCP server](https://docs.apify.com/platform/integrations/mcp.md). If your project is in a different language, use the [REST API](https://docs.apify.com/api/v2.md). For usage examples, see the [API](#api) section below. For more details, see Apify documentation as [Markdown index](https://docs.apify.com/llms.txt) and [Markdown full-text](https://docs.apify.com/llms-full.txt). # README ## Shopify Catalog Monitor — Price & Stock Change Alerts Track **price drops, stock-outs, restocks, and new or removed products** across any public Shopify store. Schedule it daily or hourly and get **only the diffs** — not a giant dump you have to compare yourself. ### Who uses this - **Competitor price monitoring** — watch rivals' Shopify stores and react to every price move. - **Dropshipping & product research** — catch new product launches and bestseller restocks early. - **Brand / MAP enforcement** — detect when a reseller breaks minimum-advertised-price. - **Deal & restock alerts** — know the moment a sold-out item is back in stock. ### How it works The Actor reads each store's public `/products.json` endpoint (no login, no scraping of rendered pages), stores a snapshot, and on every subsequent run reports what changed since last time: | Change type | Meaning | |---|---| | `price_changed` | A variant's price moved (includes `from` / `to`) | | `out_of_stock` | A variant went unavailable | | `back_in_stock` | A variant became available again | | `product_added` | A new product appeared in the catalog | | `product_removed` | A product disappeared from the catalog | | `variant_added` | A new variant (size/color) was added | ### Input | Field | Type | Description | |---|---|---| | `stores` | array of strings | Store domains or URLs, e.g. `gymshark.com` | | `maxProductsPerStore` | integer | Cap on products fetched per store per run (default 5000) | | `onlyReportChanges` | boolean | Output only diffs (default `true`) | ### Output Each detected change is one dataset record: ```json { "store": "https://gymshark.com", "detectedAt": "2026-06-01T12:00:00.000Z", "type": "price_changed", "productId": "123", "handle": "training-shorts", "variant": "M / Black", "from": "38.00", "to": "30.00" } ```` The **first run** of a store captures a baseline (no diffs); changes start on the second run — so schedule it and let it work. ### Notes - Only works on stores that keep `/products.json` public (most do; some large brands disable it — those are skipped with a notice). - Priced pay-per-event: you pay for stores checked and changes detected. No subscription. # Actor input Schema ## `stores` (type: `array`): Store domains or URLs to monitor, e.g. "gymshark.com" or "https://www.allbirds.com". ## `maxProductsPerStore` (type: `integer`): Upper bound on products fetched per store per run. ## `onlyReportChanges` (type: `boolean`): If on, the dataset contains only detected changes. If off, also store a full catalog snapshot each run. ## Actor input object example ```json { "stores": [ "gymshark.com" ], "maxProductsPerStore": 5000, "onlyReportChanges": true } ``` # API You can run this Actor programmatically using our API. Below are code examples in JavaScript, Python, and CLI, as well as the OpenAPI specification and MCP server setup. ## JavaScript example ```javascript import { ApifyClient } from 'apify-client'; // Initialize the ApifyClient with your Apify API token // Replace the '' with your token const client = new ApifyClient({ token: '', }); // Prepare Actor input const input = { "stores": [ "gymshark.com" ] }; // Run the Actor and wait for it to finish const run = await client.actor("dizzyvinci/shopify-catalog-monitor").call(input); // Fetch and print Actor results from the run's dataset (if any) console.log('Results from dataset'); console.log(`💾 Check your data here: https://console.apify.com/storage/datasets/${run.defaultDatasetId}`); const { items } = await client.dataset(run.defaultDatasetId).listItems(); items.forEach((item) => { console.dir(item); }); // 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/js/docs ``` ## Python example ```python from apify_client import ApifyClient # Initialize the ApifyClient with your Apify API token # Replace '' with your token. client = ApifyClient("") # Prepare the Actor input run_input = { "stores": ["gymshark.com"] } # Run the Actor and wait for it to finish run = client.actor("dizzyvinci/shopify-catalog-monitor").call(run_input=run_input) # Fetch and print Actor results from the run's dataset (if there are any) print("💾 Check your data here: https://console.apify.com/storage/datasets/" + run["defaultDatasetId"]) for item in client.dataset(run["defaultDatasetId"]).iterate_items(): print(item) # 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/python/docs/quick-start ``` ## CLI example ```bash echo '{ "stores": [ "gymshark.com" ] }' | apify call dizzyvinci/shopify-catalog-monitor --silent --output-dataset ``` ## MCP server setup ```json { "mcpServers": { "apify": { "command": "npx", "args": [ "mcp-remote", "https://mcp.apify.com/?tools=dizzyvinci/shopify-catalog-monitor", "--header", "Authorization: Bearer " ] } } } ``` ## OpenAPI specification ```json { "openapi": "3.0.1", "info": { "title": "Shopify Catalog Monitor — Price & Stock Change Alerts", "description": "Track price drops, stock-outs, restocks, and new/removed products across any public Shopify store. Schedule it and receive only the diffs.", "version": "0.1", "x-build-id": "eJoOyGcpE0FeWf0B1" }, "servers": [ { "url": "https://api.apify.com/v2" } ], "paths": { "/acts/dizzyvinci~shopify-catalog-monitor/run-sync-get-dataset-items": { "post": { "operationId": "run-sync-get-dataset-items-dizzyvinci-shopify-catalog-monitor", "x-openai-isConsequential": false, "summary": "Executes an Actor, waits for its completion, and returns Actor's dataset items in response.", "tags": [ "Run Actor" ], "requestBody": { "required": true, "content": { "application/json": { "schema": { "$ref": "#/components/schemas/inputSchema" } } } }, "parameters": [ { "name": "token", "in": "query", "required": true, "schema": { "type": "string" }, "description": "Enter your Apify token here" } ], "responses": { "200": { "description": "OK" } } } }, "/acts/dizzyvinci~shopify-catalog-monitor/runs": { "post": { "operationId": "runs-sync-dizzyvinci-shopify-catalog-monitor", "x-openai-isConsequential": false, "summary": "Executes an Actor and returns information about the initiated run in response.", "tags": [ "Run Actor" ], "requestBody": { "required": true, "content": { "application/json": { "schema": { "$ref": "#/components/schemas/inputSchema" } } } }, "parameters": [ { "name": "token", "in": "query", "required": true, "schema": { "type": "string" }, "description": "Enter your Apify token here" } ], "responses": { "200": { "description": "OK", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/runsResponseSchema" } } } } } } }, "/acts/dizzyvinci~shopify-catalog-monitor/run-sync": { "post": { "operationId": "run-sync-dizzyvinci-shopify-catalog-monitor", "x-openai-isConsequential": false, "summary": "Executes an Actor, waits for completion, and returns the OUTPUT from Key-value store in response.", "tags": [ "Run Actor" ], "requestBody": { "required": true, "content": { "application/json": { "schema": { "$ref": "#/components/schemas/inputSchema" } } } }, "parameters": [ { "name": "token", "in": "query", "required": true, "schema": { "type": "string" }, "description": "Enter your Apify token here" } ], "responses": { "200": { "description": "OK" } } } } }, "components": { "schemas": { "inputSchema": { "type": "object", "required": [ "stores" ], "properties": { "stores": { "title": "Shopify stores", "type": "array", "description": "Store domains or URLs to monitor, e.g. \"gymshark.com\" or \"https://www.allbirds.com\".", "items": { "type": "string" } }, "maxProductsPerStore": { "title": "Max products per store", "minimum": 1, "type": "integer", "description": "Upper bound on products fetched per store per run.", "default": 5000 }, "onlyReportChanges": { "title": "Only output changes (recommended)", "type": "boolean", "description": "If on, the dataset contains only detected changes. If off, also store a full catalog snapshot each run.", "default": true } } }, "runsResponseSchema": { "type": "object", "properties": { "data": { "type": "object", "properties": { "id": { "type": "string" }, "actId": { "type": "string" }, "userId": { "type": "string" }, "startedAt": { "type": "string", "format": "date-time", "example": "2025-01-08T00:00:00.000Z" }, "finishedAt": { "type": "string", "format": "date-time", "example": "2025-01-08T00:00:00.000Z" }, "status": { "type": "string", "example": "READY" }, "meta": { "type": "object", "properties": { "origin": { "type": "string", "example": "API" }, "userAgent": { "type": "string" } } }, "stats": { "type": "object", "properties": { "inputBodyLen": { "type": "integer", "example": 2000 }, "rebootCount": { "type": "integer", "example": 0 }, "restartCount": { "type": "integer", "example": 0 }, "resurrectCount": { "type": "integer", "example": 0 }, "computeUnits": { "type": "integer", "example": 0 } } }, "options": { "type": "object", "properties": { "build": { "type": "string", "example": "latest" }, "timeoutSecs": { "type": "integer", "example": 300 }, "memoryMbytes": { "type": "integer", "example": 1024 }, "diskMbytes": { "type": "integer", "example": 2048 } } }, "buildId": { "type": "string" }, "defaultKeyValueStoreId": { "type": "string" }, "defaultDatasetId": { "type": "string" }, "defaultRequestQueueId": { "type": "string" }, "buildNumber": { "type": "string", "example": "1.0.0" }, "containerUrl": { "type": "string" }, "usage": { "type": "object", "properties": { "ACTOR_COMPUTE_UNITS": { "type": "integer", "example": 0 }, "DATASET_READS": { "type": "integer", "example": 0 }, "DATASET_WRITES": { "type": "integer", "example": 0 }, "KEY_VALUE_STORE_READS": { "type": "integer", "example": 0 }, "KEY_VALUE_STORE_WRITES": { "type": "integer", "example": 1 }, "KEY_VALUE_STORE_LISTS": { "type": "integer", "example": 0 }, "REQUEST_QUEUE_READS": { "type": "integer", "example": 0 }, "REQUEST_QUEUE_WRITES": { "type": "integer", "example": 0 }, "DATA_TRANSFER_INTERNAL_GBYTES": { "type": "integer", "example": 0 }, "DATA_TRANSFER_EXTERNAL_GBYTES": { "type": "integer", "example": 0 }, "PROXY_RESIDENTIAL_TRANSFER_GBYTES": { "type": "integer", "example": 0 }, "PROXY_SERPS": { "type": "integer", "example": 0 } } }, "usageTotalUsd": { "type": "number", "example": 0.00005 }, "usageUsd": { "type": "object", "properties": { "ACTOR_COMPUTE_UNITS": { "type": "integer", "example": 0 }, "DATASET_READS": { "type": "integer", "example": 0 }, "DATASET_WRITES": { "type": "integer", "example": 0 }, "KEY_VALUE_STORE_READS": { "type": "integer", "example": 0 }, "KEY_VALUE_STORE_WRITES": { "type": "number", "example": 0.00005 }, "KEY_VALUE_STORE_LISTS": { "type": "integer", "example": 0 }, "REQUEST_QUEUE_READS": { "type": "integer", "example": 0 }, "REQUEST_QUEUE_WRITES": { "type": "integer", "example": 0 }, "DATA_TRANSFER_INTERNAL_GBYTES": { "type": "integer", "example": 0 }, "DATA_TRANSFER_EXTERNAL_GBYTES": { "type": "integer", "example": 0 }, "PROXY_RESIDENTIAL_TRANSFER_GBYTES": { "type": "integer", "example": 0 }, "PROXY_SERPS": { "type": "integer", "example": 0 } } } } } } } } } } ```