Check if Map JavaScript API is enabled and working with an apiKey

I need to create a health-check service in Nodejs to see if Map JavaScript API is enabled and working with a certain apiKey.

But I can’t find a service to check that, only with the Map JavaScript API.

I found different URL for the different services ( directions, geolocation… ) to make a request and check if they are enabled and working, but I can’t find a service to check that, only with the Map JavaScript API.

Thanks in advance your help.