urlwatch, an open-source self-hostable service that can monitor web pages for free and notify you by email, smartphone, or other means when changes occur

Open-source urlwatch was introduced as a self-hosted tool for regularly monitoring web pages and command output, notifying only when changes are detected.

It can watch pages even without RSS, and its setup covers installation, target configuration, filtering, and notification options.

Supported alerts include Slack, Discord, Telegram, Gmail SMTP, Amazon SES, and ntfy.sh, giving users flexible delivery choices.

The tool also supports fine-grained extraction rules with XPath and jq, making it useful from personal news tracking to operations monitoring.