{
	"phoneNumber": 79632232293
}curl --location -g --request POST 'https://api.green-api.com/waInstance<Your idInstance from your Green API account>/checkWhatsapp/<Your apiTokenInstance from your Green API account>' \
--header 'Content-Type: application/json' \
--data-raw '{
	"phoneNumber": 79632232293
}'{
    "existsWhatsapp": true
}