Configuration should be the following (example):
{
"channelName":"downdetector",
"checks":[
{
"type":"http",
"value":"https://google.com",
"interval":"30min"
}
]
}
This means that it checks the google.com with an http request in every 30 min, and if it's down sends a request to the channel downdetector (if it doesn't find this channel then send it into unknown)