# Website Change Tracker – Competitor & Content Monitor (`conceivable_extension/website-change-tracker`) Actor Monitor any web page for content changes. Detects price updates, policy edits, competitor announcements, and new content. Stores page snapshots and alerts on meaningful diffs. PPE: $0.002 no change, $0.008 changed. - **URL**: https://apify.com/conceivable\_extension/website-change-tracker.md - **Developed by:** [joseph fadero](https://apify.com/conceivable_extension) (community) - **Categories:** Automation, E-commerce, Integrations - **Stats:** 2 total users, 1 monthly users, 100.0% runs succeeded, 1 bookmarks - **User rating**: No ratings yet ## Pricing from $4.00 / 1,000 asin checkeds 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 ## Website Change Tracker – Competitor & Content Monitor **Monitor any web page for content changes at $0.008 per changed page.** Track competitor pricing pages, product announcements, policy documents, or any web content. Get alerted when something changes — without manual checking. ### What it tracks - Full page text or HTML content - Specific CSS selectors (e.g. `.price`, `#announcement-banner`) - Change ratio (how much of the page changed) - Added and removed sentences (diff summary) - Optional screenshot on change ### Pricing | Event | Price | |---|---| | Run started | $0.05 | | Page checked – no change | $0.002 | | Page changed | $0.008 | | Page failed | $0.001 | **10 pages daily = $0.07/day if nothing changes, $0.13/day if everything changes** ### Input | Field | Default | Description | |---|---|---| | urls | required | List of URLs to monitor | | trackingMode | text | Compare visible text, full HTML, or a CSS selector | | cssSelector | – | CSS selector (only used when trackingMode is 'selector') | | changeSensitivity | medium | Low (>5% diff), Medium (>1% diff), High (any diff) | | captureScreenshot | false | Save screenshot to KV Store on change | | maxPages | 100 | Max URLs per run | ### Output fields - `url`, `changeDetected`, `changeSummary`, `changeRatio` - `addedSentences`, `removedSentences` - `previousHash`, `currentHash` - `previousCheckedAt`, `checkedAt` - `screenshotKey`, `status`, `errorMessage`, `chargedEvent` ### n8n integration Schedule this actor daily → filter `changeDetected: true` → send Slack or email alert with `changeSummary` and `addedSentences`. # Actor input Schema ## `urls` (type: `array`): List of web page URLs to monitor for changes. Each URL is tracked independently. ## `trackingMode` (type: `string`): What part of the page to compare: full HTML, visible text only, or a specific CSS selector. ## `cssSelector` (type: `string`): CSS selector to extract a specific element for comparison. Only used when trackingMode is 'selector'. ## `changeSensitivity` (type: `string`): How sensitive the change detection should be. Low ignores minor edits (>5% diff), Medium catches small changes (>1%), High flags any difference. ## `captureScreenshot` (type: `boolean`): Save a screenshot to the Key-Value Store when a change is detected. ## `maxPages` (type: `integer`): Maximum number of URLs to process per run. Useful for large watchlists. ## Actor input object example ```json { "urls": [ "https://example.com/pricing", "https://competitor.com/blog" ], "trackingMode": "text", "cssSelector": "", "changeSensitivity": "medium", "captureScreenshot": false, "maxPages": 100 } ```` # 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 = { "urls": [ "https://example.com/pricing", "https://competitor.com/blog" ] }; // Run the Actor and wait for it to finish const run = await client.actor("conceivable_extension/website-change-tracker").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 = { "urls": [ "https://example.com/pricing", "https://competitor.com/blog", ] } # Run the Actor and wait for it to finish run = client.actor("conceivable_extension/website-change-tracker").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 '{ "urls": [ "https://example.com/pricing", "https://competitor.com/blog" ] }' | apify call conceivable_extension/website-change-tracker --silent --output-dataset ``` ## MCP server setup ```json { "mcpServers": { "apify": { "command": "npx", "args": [ "mcp-remote", "https://mcp.apify.com/?tools=conceivable_extension/website-change-tracker", "--header", "Authorization: Bearer " ] } } } ``` ## OpenAPI specification ```json { "openapi": "3.0.1", "info": { "title": "Website Change Tracker – Competitor & Content Monitor", "description": "Monitor any web page for content changes. Detects price updates, policy edits, competitor announcements, and new content. Stores page snapshots and alerts on meaningful diffs. PPE: $0.002 no change, $0.008 changed.", "version": "1.0", "x-build-id": "sspBkedQ9saQ1um7a" }, "servers": [ { "url": "https://api.apify.com/v2" } ], "paths": { "/acts/conceivable_extension~website-change-tracker/run-sync-get-dataset-items": { "post": { "operationId": "run-sync-get-dataset-items-conceivable_extension-website-change-tracker", "x-openai-isConsequential": false, "summary": "Executes an Actor, waits for its completion, and returns Actor's dataset items in response.", "tags": [ "Run Actor" ], "requestBody": { "required": true, "content": { "application/json": { "schema": { "$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/conceivable_extension~website-change-tracker/runs": { "post": { "operationId": "runs-sync-conceivable_extension-website-change-tracker", "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/conceivable_extension~website-change-tracker/run-sync": { "post": { "operationId": "run-sync-conceivable_extension-website-change-tracker", "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": [ "urls" ], "properties": { "urls": { "title": "URLs to monitor", "type": "array", "description": "List of web page URLs to monitor for changes. Each URL is tracked independently.", "items": { "type": "string" } }, "trackingMode": { "title": "Content tracking mode", "enum": [ "text", "html", "selector" ], "type": "string", "description": "What part of the page to compare: full HTML, visible text only, or a specific CSS selector.", "default": "text" }, "cssSelector": { "title": "CSS selector", "type": "string", "description": "CSS selector to extract a specific element for comparison. Only used when trackingMode is 'selector'.", "default": "" }, "changeSensitivity": { "title": "Change sensitivity", "enum": [ "low", "medium", "high" ], "type": "string", "description": "How sensitive the change detection should be. Low ignores minor edits (>5% diff), Medium catches small changes (>1%), High flags any difference.", "default": "medium" }, "captureScreenshot": { "title": "Capture screenshot on change", "type": "boolean", "description": "Save a screenshot to the Key-Value Store when a change is detected.", "default": false }, "maxPages": { "title": "Max pages per run", "minimum": 1, "maximum": 500, "type": "integer", "description": "Maximum number of URLs to process per run. Useful for large watchlists.", "default": 100 } } }, "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 } } } } } } } } } } ```