This bot is a powerful and reliable website monitor that can ping any website periodically and send instant and accurate alerts to the owner if the website goes down or up. It can also provide detailed and useful statistics, history, and analytics of the monitored websites, such as response times, error rate, and uptime percentage. The bot uses different methods (HEAD, GET, or POST) to send requests to the websites and allows the owner to set a custom and flexible time interval for each website. The bot also supports scheduling the monitors using simple and convenient cron expressions, so the owner can specify when the monitors should run. The bot is easy and fun to use and has a help command that explains how to use each command. The bot is a great and essential tool for anyone who wants to keep track of their websites and ensure they are always online and responsive.

UpTimeRobot

A better UptimeRobot alternative. DM me (haruki.py) to get time interval between pings 5 seconds totally for free! 

Voting for UpTimeRobot