You can access the Website Change Monitor programmatically from your own applications by using the Apify API. You can also choose the language preference from below. To use the Apify API, you’ll need an Apify account and your API token, found in API & Integrations in Apify Console.

Python

JavaScript

CLI

OpenAPI

HTTP

MCP

1import { ApifyClient } from 'apify-client';
2
3// Initialize the ApifyClient with your Apify API token
4// Replace the '<YOUR_API_TOKEN>' with your token
5const client = new ApifyClient({
6    token: '<YOUR_API_TOKEN>',
7});
8
9// Prepare Actor input
10const input = {
11    "proxyConfiguration": {
12        "useApifyProxy": false
13    }
14};
15
16// Run the Actor and wait for it to finish
17const run = await client.actor("yearly_register/website-change-monitor").call(input);
18
19// Fetch and print Actor results from the run's dataset (if any)
20console.log('Results from dataset');
21console.log(`💾 Check your data here: https://console.apify.com/storage/datasets/${run.defaultDatasetId}`);
22const { items } = await client.dataset(run.defaultDatasetId).listItems();
23items.forEach((item) => {
24    console.dir(item);
25});
26
27// 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/js/docs

Website Change Monitor API in JavaScript

The Apify API client for JavaScript is the official library that allows you to use Website Change Monitor API in JavaScript or TypeScript, providing convenience functions and automatic retries on errors.

Install the apify-client

$npm install apify-client

Other API clients include:

Website Change Monitor API in Python

Website Change Monitor API through CLI

Website Change Monitor OpenAPI definition

Website Change Monitor API

Firecrawl Website Change Monitor - Track Page Changes with AI

alizarin_refrigerator-owner/firecrawl-website-change-monitor---track-page-changes-with-ai

Monitor websites for content changes. Get notified when pricing, inventory, competitor pages, or any web content changes. Uses Firecrawl for intelligent change detection. Markdown Comparison JSON Extraction Change Notifications Webhook Integration Scheduled Monitoring

The Howlers

Website Change Monitor & Diff Tracker

ryanclinton/website-change-monitor

Monitor any website for content changes with automatic diff detection. Track pricing pages, competitor sites, ToS updates, and more. Compares snapshots, reports added/removed text, and supports CSS selector targeting for precise monitoring.

Ryan Clinton

Website Change Monitor — AI Alerts to Email/Slack

inovaflow/website-change-tracker

Automated competitor monitoring and website change detection: watches the competitor websites you choose, uses AI to explain what changed and how much it matters, and sends website monitoring alerts and price change notifications to Email and Slack, plus a Notion archive.

inovaflow

website-change-monitor

desmond-dev/website-change-monitor

Monitor any website for changes. If content updates, convert it to clean Markdown. Perfect for RAG, AI Agents, and competitor tracking. Ignores ads and navigation.

Desmond Chigariro

Website Change Monitor

optimus-fulcria/website-change-monitor

Monitor websites for content changes. Full page, CSS selector, or text pattern matching. Diff summaries and alerts.

Fulcria Labs

Web Watchdog - Website Change Monitor & Diff API for AI Agents

santhej/web-watchdog

Check if any URL changed since a given content hash, or watch it on a schedule. Diffs web pages, JSON APIs, RSS feeds and sitemaps and returns what changed, old vs new values, numeric deltas and a one-line summary. Billed per change detected, not per check. Strongest on APIs, docs and changelogs.

Santhej Kallada

Competitor Website Change Monitor & Briefing

solutionssmart/competitor-website-change-briefing

Monitor competitor websites, detect meaningful changes across runs, and turn them into decision-ready competitive intelligence and briefings.

Solutions Smart

WatchTower – Website Change & Price Monitor

hichemdev/watchtower-website-change-monitor

Monitor any website for changes - track competitor prices, stock/availability, and content updates with field-level precision. Get instant webhook alerts on any change, a price increase or drop, or when a keyword appears. Ideal for price monitoring, competitor intelligence, and compliance.