changedetection.io — мониторинг изменений на сайтах

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changedetection.io is a self-hosted service for monitoring changes on web pages: it watches the URLs you specify and notifies you when something on them changes. Reach for it when you need to automatically track changes on the web: a product price drop, an item coming back in stock, updated terms or a document, new job postings, edits on a competitor's page — and get an alert (email, Telegram, webhook, and dozens of other channels). It can watch a specific part of a page, visual changes, and data behind a login, and handles dynamic pages through a browser. Its focus is monitoring web-page changes with notifications, not one-off scraping of a site into data (Firecrawl/crawl4ai) or service uptime monitoring (uptime-kuma): the value is learning about changes on the pages you care about in time and automatically. It suits tracking prices, availability, terms, and any pages worth watching.