What does this plugin do?
The site availability plugin uses the fantastic Down for everyone or just me? website to check whether a given website is online or not and sends you the result.
How does it look?
URL: https://hooks.sscaas.eu/uptime/?callback=<your webhook URL>
Replace 'up' with your chosen slash command and example.com with the domain you wish to check.
Slackbot will inform you of the site's status.