Monitor web pages for changes: create monitors, list detected changes and read diffs.
Free
One server, in web, search & scraping. Monitor web pages for changes: create monitors, list detected changes and read diffs.
Web, Search & Scraping
Monitor web pages for changes: create monitors, list detected changes and read diffs.
The rest either hold an API key issued by the publisher or ask for nothing.
Listed without a verification tick. Read the listing before installing.