Watchbot

Watchbot is a specialized monitoring tool designed to help website owners maintain service availability and security compliance. Operated by Alex Ryabov, the service integrates directly with Telegram to provide real-time notifications when a monitored URL goes offline or when critical assets like SSL certificates or domain registrations approach their expiration dates. It has been active since 2015 and includes advanced features such as monitoring Certificate Transparency logs to detect unauthorized or new certificates issued for a domain.

Watchbot crawls specific user-defined URLs to perform health checks and verify the status of security headers and certificates. It does not index content for search or training purposes; instead, it performs lightweight HTTP requests to determine if a site is responsive and to inspect the metadata of its security certificates. Site administrators can verify the bot's activity by checking the logs for the user-agent string provided in its documentation or by visiting the official project page at https://watchbot.fflow.net.