# Landing Page Offer Change Monitor (`kayhermes/163-landing-page-offer-change-monitor`) Actor Compare structured landing-page snapshots and detect material changes to price, discount, guarantee, shipping, CTA, and stock. - **URL**: https://apify.com/kayhermes/163-landing-page-offer-change-monitor.md - **Developed by:** [Khoa Nguyen](https://apify.com/kayhermes) (community) - **Categories:** Marketing - **Stats:** 2 total users, 1 monthly users, 60.0% runs succeeded, 0 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 web data automations that power AI and operations. They run on the Apify platform to scrape websites, process data, connect APIs, and automate workflows. 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/docs.md): ```bash npm install apify-client ``` In Python projects, use official [Python client library](https://docs.apify.com/api/client/python/docs.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/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 ## Landing Page Offer Change Monitor Compare structured landing-page snapshots and detect material changes to price, discount, guarantee, shipping, CTA, and stock. ### Input Provide structured JSON directly or optional public/authorized JSON and CSV source URLs. See `sample-input.json` and the Actor input schema. ### Output The default Dataset contains the Actor's decision-ready result records. `OUTPUT` contains run totals and `REPORT.html` contains a human-readable review. ### Responsible-use and accuracy This Actor compares explicit structured snapshots. It does not render JavaScript pages, bypass anti-bot controls, or guarantee that every visual offer element was captured. ### Local validation ```bash npm ci npm test npm run check npm run sample ```` # Actor input Schema ## `snapshots` (type: `array`): Structured snapshots. Capture only pages you are authorized to monitor. ## `sourceUrls` (type: `array`): Optional URLs to JSON or CSV source data. Imported records are combined with inline input data. ## `priceTolerance` (type: `number`): Relative price difference tolerated before a landing-page offer change is reported. ## `alertOnFirstRun` (type: `boolean`): When enabled, emit alerts for qualifying items in the first observed snapshot instead of only later changes. ## `maxSourceBytes` (type: `integer`): Maximum number of bytes downloaded from each optional source URL to limit input size. ## Actor input object example ```json { "snapshots": [ { "url": "https://example.com/product?utm_source=ad", "observedAt": "2026-07-01", "headline": "Build faster this summer", "cta": "Start now", "price": 99, "compareAtPrice": 129, "coupon": "SUMMER10", "freeShippingThreshold": 75, "guaranteeDays": 30, "trialDays": 14, "stockStatus": "in stock", "bundle": "starter kit", "subscription": false }, { "url": "https://example.com/product", "observedAt": "2026-07-15", "headline": "Build faster this summer", "cta": "Get the deal", "price": 89, "compareAtPrice": 129, "coupon": "SUMMER20", "freeShippingThreshold": 50, "guaranteeDays": 60, "trialDays": 14, "stockStatus": "low stock", "bundle": "starter kit plus bonus", "subscription": false } ], "sourceUrls": [], "priceTolerance": 0.005, "alertOnFirstRun": true, "maxSourceBytes": 5000000 } ``` # Actor output Schema ## `OUTPUT` (type: `string`): No description ## `REPORT` (type: `string`): No description ## `DATASET` (type: `string`): No description # 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 = {}; // Run the Actor and wait for it to finish const run = await client.actor("kayhermes/163-landing-page-offer-change-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 = {} # Run the Actor and wait for it to finish run = client.actor("kayhermes/163-landing-page-offer-change-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 '{}' | apify call kayhermes/163-landing-page-offer-change-monitor --silent --output-dataset ``` ## MCP server setup ```json { "mcpServers": { "apify": { "command": "npx", "args": [ "mcp-remote", "https://mcp.apify.com/?tools=kayhermes/163-landing-page-offer-change-monitor", "--header", "Authorization: Bearer " ] } } } ``` ## OpenAPI specification ```json { "openapi": "3.0.1", "info": { "title": "Landing Page Offer Change Monitor", "description": "Compare structured landing-page snapshots and detect material changes to price, discount, guarantee, shipping, CTA, and stock.", "version": "1.0", "x-build-id": "JyLvt3Hohw42U6Xqn" }, "servers": [ { "url": "https://api.apify.com/v2" } ], "paths": { "/acts/kayhermes~163-landing-page-offer-change-monitor/run-sync-get-dataset-items": { "post": { "operationId": "run-sync-get-dataset-items-kayhermes-163-landing-page-offer-change-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/kayhermes~163-landing-page-offer-change-monitor/runs": { "post": { "operationId": "runs-sync-kayhermes-163-landing-page-offer-change-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/kayhermes~163-landing-page-offer-change-monitor/run-sync": { "post": { "operationId": "run-sync-kayhermes-163-landing-page-offer-change-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", "properties": { "snapshots": { "title": "Landing-page snapshots", "type": "array", "description": "Structured snapshots. Capture only pages you are authorized to monitor.", "items": { "type": "object" }, "default": [ { "url": "https://example.com/product?utm_source=ad", "observedAt": "2026-07-01", "headline": "Build faster this summer", "cta": "Start now", "price": 99, "compareAtPrice": 129, "coupon": "SUMMER10", "freeShippingThreshold": 75, "guaranteeDays": 30, "trialDays": 14, "stockStatus": "in stock", "bundle": "starter kit", "subscription": false }, { "url": "https://example.com/product", "observedAt": "2026-07-15", "headline": "Build faster this summer", "cta": "Get the deal", "price": 89, "compareAtPrice": 129, "coupon": "SUMMER20", "freeShippingThreshold": 50, "guaranteeDays": 60, "trialDays": 14, "stockStatus": "low stock", "bundle": "starter kit plus bonus", "subscription": false } ] }, "sourceUrls": { "title": "Optional JSON/CSV source URLs", "type": "array", "description": "Optional URLs to JSON or CSV source data. Imported records are combined with inline input data.", "items": { "type": "string" }, "default": [] }, "priceTolerance": { "title": "Relative price tolerance", "minimum": 0, "maximum": 0.25, "type": "number", "description": "Relative price difference tolerated before a landing-page offer change is reported.", "default": 0.005 }, "alertOnFirstRun": { "title": "Alert when the first input contains two snapshots", "type": "boolean", "description": "When enabled, emit alerts for qualifying items in the first observed snapshot instead of only later changes.", "default": true }, "maxSourceBytes": { "title": "Maximum bytes per source", "minimum": 1000, "maximum": 20000000, "type": "integer", "description": "Maximum number of bytes downloaded from each optional source URL to limit input size.", "default": 5000000 } } }, "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 } } } } } } } } } } ```