ForoElectro online MQTT Client
First you have to create an Application. You will need 2 fields: Name and email. After this you get an ApiKey.
How to get an ApiKey?
Para crear tu ApiKey se requieren 2 campos: Nombre y email.
You can use API with your ApiKey or login in this site using also your email to view your data.
Yoiu can create as much applications as youn want with same email, each one will have its own ApiKey.
You can change email or Application, your ApiKey will not change.