# Shopify Price & Stock Change Monitor (`mfs37/shopify-price-stock-monitor`) Actor Monitor Shopify stores for price drops, restocks, and new products. Endpoint-based — no browser, no proxies. Returns only what changed. Track hourly inventory deltas and price drops directly via products.json without database bloat - **URL**: https://apify.com/mfs37/shopify-price-stock-monitor.md - **Developed by:** [Malte Friedrich](https://apify.com/mfs37) (community) - **Categories:** Integrations, E-commerce, Automation - **Stats:** 2 total users, 0 monthly users, 100.0% runs succeeded, 0 bookmarks - **User rating**: No ratings yet ## Pricing from $0.005 / result This Actor is paid per event. You are not charged for the Apify platform usage, but only a fixed price for specific events. Learn more: https://docs.apify.com/platform/actors/running/actors-in-store#pay-per-event ## 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 Price & Stock Change Monitor **Monitors Shopify stores for price drops, stock changes, and new products. Only what changed since last check.** Unlike traditional scrapers that return full catalogs every single run and consume massive compute/proxy resources, this actor stores its state between runs and emits true, incremental deltas. Perfect for price-arbitrage bots, dropshipping intelligence, and AI-agent automation. --- ### 🌌 Features * **Zero-Proxy Cost Moat:** Uses stable public JSON endpoints (`/products.json`). No headless browsers, no HTML parsing, no residential proxies needed. * **True Delta Output:** Returns only changed items (`price_up`, `price_down`, `back_in_stock`, `out_of_stock`, `new`, `removed`). * **Agentic Ready:** PPE priced, zero-Standby required, and fully discoverable by AI agents (e.g. x402/MCP users). --- ### 🛠️ Input Schema | Field | Type | Required | Default | Description | |---|---|---|---|---| | `storeUrls` | Array of strings | **Yes** | — | One or more Shopify store base URLs (e.g., `["https://kith.com"]`). | | `minPriceChangePercent` | Integer | No | `5` | Only report price changes whose difference is above this percentage threshold. | | `backInStockOnly` | Boolean | No | `false` | If enabled, only reports items transitioning from out of stock to back in stock (restocks). | | `checkIntervalMinutes` | Integer | No | `60` | Intended check interval in minutes (used for metadata). | --- ### 📊 Output Example When a change is detected, the actor pushes a structured delta object to the default dataset: ```json [ { "storeUrl": "https://kith.com", "productTitle": "Kith Classic Cap - Black", "change_type": "price_down", "old_value": "60.00", "new_value": "50.00", "product_url": "https://kith.com/products/khm051558-001-ph" }, { "storeUrl": "https://kith.com", "productTitle": "Kith Classic Cap - Black", "change_type": "back_in_stock", "old_value": "out_of_stock", "new_value": "available", "product_url": "https://kith.com/products/khm051558-001-ph" }, { "storeUrl": "https://kith.com", "productTitle": "Kith Classic Cap - Black", "change_type": "new", "old_value": null, "new_value": "Price: 60.00, Stock: available", "product_url": "https://kith.com/products/khm051558-001-ph" } ] ```` #### Supported `change_type` values: - `price_up` - Variant price increased - `price_down` - Variant price decreased (exceeding `minPriceChangePercent`) - `back_in_stock` - Variant stock went from out-of-stock to available - `out_of_stock` - Variant stock went from available to out-of-stock - `new` - A new product or variant was added - `removed` - A product or variant was removed from the store *** ### ⚡ Pay-Per-Event (PPE) Cost Math This actor is priced strictly by event performance: - **Actor Start:** `$0.01` per run - **Default Dataset Item (emitted change):** `$0.005` per changed item #### Example Math: - **Small Store** (200 products, checked hourly, averages 5 changes/day): - `24 runs * $0.01` = `$0.24` - `5 changes * $0.005` = `$0.025` - **Total cost:** `$0.265/day` - **Large Store** (1,000 products, checked hourly, averages 20 changes/day): - `24 runs * $0.01` = `$0.24` - `20 changes * $0.005` = `$0.10` - **Total cost:** `$0.34/day` *** ### ⚠️ Limitations - Requires a public `/products.json` endpoint (exposed by default on ~99% of public Shopify stores). - Does not work on password-protected stores or stores that have explicitly disabled their products endpoint. - Max 250 products per page. Full pagination is handled automatically. - Very large catalogs (>10k products) are fetched at ~2 pages/sec to respect Shopify rate limits. - Catalogs above ~25,000 products exceed the public endpoint's pagination cap and are skipped with a warning. *** ### 🤖 AI Agent Integration > \[!NOTE] > **Agentic Compatibility Badge:** This actor is agent-compatible. AI agents can discover, run, and pay for it programmatically without an Apify account using standardized pay-per-event routing. # Actor input Schema ## `storeUrls` (type: `array`): One or more Shopify store base URLs (e.g., https://kith.com) ## `minPriceChangePercent` (type: `integer`): Only report price changes above this percentage threshold (e.g., 5 for 5%) ## `backInStockOnly` (type: `boolean`): Only report items that went from out of stock to back in stock ## `checkIntervalMinutes` (type: `integer`): Intended check interval in minutes (default 60) ## Actor input object example ```json { "storeUrls": [ "https://kith.com" ], "minPriceChangePercent": 5, "backInStockOnly": false, "checkIntervalMinutes": 60 } ``` # Actor output Schema ## `datasetUrl` (type: `string`): The URL to the default dataset containing all detected price and stock changes. # 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 = { "storeUrls": [ "https://kith.com" ], "minPriceChangePercent": 5, "backInStockOnly": false, "checkIntervalMinutes": 60 }; // Run the Actor and wait for it to finish const run = await client.actor("mfs37/shopify-price-stock-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 = { "storeUrls": ["https://kith.com"], "minPriceChangePercent": 5, "backInStockOnly": False, "checkIntervalMinutes": 60, } # Run the Actor and wait for it to finish run = client.actor("mfs37/shopify-price-stock-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 '{ "storeUrls": [ "https://kith.com" ], "minPriceChangePercent": 5, "backInStockOnly": false, "checkIntervalMinutes": 60 }' | apify call mfs37/shopify-price-stock-monitor --silent --output-dataset ``` ## MCP server setup ```json { "mcpServers": { "apify": { "command": "npx", "args": [ "mcp-remote", "https://mcp.apify.com/?tools=mfs37/shopify-price-stock-monitor", "--header", "Authorization: Bearer " ] } } } ``` ## OpenAPI specification ```json { "openapi": "3.0.1", "info": { "title": "Shopify Price & Stock Change Monitor", "description": "Monitor Shopify stores for price drops, restocks, and new products. Endpoint-based — no browser, no proxies. Returns only what changed.\n\nTrack hourly inventory deltas and price drops directly via products.json without database bloat", "version": "1.0", "x-build-id": "1diyE5aT1JzqOTTMf" }, "servers": [ { "url": "https://api.apify.com/v2" } ], "paths": { "/acts/mfs37~shopify-price-stock-monitor/run-sync-get-dataset-items": { "post": { "operationId": "run-sync-get-dataset-items-mfs37-shopify-price-stock-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/mfs37~shopify-price-stock-monitor/runs": { "post": { "operationId": "runs-sync-mfs37-shopify-price-stock-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/mfs37~shopify-price-stock-monitor/run-sync": { "post": { "operationId": "run-sync-mfs37-shopify-price-stock-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": [ "storeUrls" ], "properties": { "storeUrls": { "title": "Store URLs", "type": "array", "description": "One or more Shopify store base URLs (e.g., https://kith.com)", "items": { "type": "string" } }, "minPriceChangePercent": { "title": "Minimum Price Change Percent", "minimum": 0, "type": "integer", "description": "Only report price changes above this percentage threshold (e.g., 5 for 5%)", "default": 5 }, "backInStockOnly": { "title": "Back In Stock Only", "type": "boolean", "description": "Only report items that went from out of stock to back in stock", "default": false }, "checkIntervalMinutes": { "title": "Check Interval Minutes (Metadata)", "minimum": 1, "type": "integer", "description": "Intended check interval in minutes (default 60)", "default": 60 } } }, "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 } } } } } } } } } } ```