I am talking about the services which let you monitor the status of a website whether the website is up and operational or down or under heavy load.

how do they work under the hood?

for example:

https://githubstatus.com

https://instatus.com

I am building something similar for monitoring my web projects.

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[–] 12 points 2 years ago

You should check out Uptime Kuma which offers different monitor types. This should give you a good start for your own implementations. Or maybe you'll find that Uptime Kuma already covers your usecase.

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