A sandbox is a safe testing platform where you're free to try our WhatsApp Business API and all its features. You can create a new sandbox connection from your Octopods dashboard by clicking on WhatsApp Sandbox:

When you create a new sandbox connection, you will be able to receive WhatsApp messages in your Intercom Inbox from only one phone number. You may create additional sandbox connections using other phone numbers if you wish, as shown below:

When you're done testing, simply deactivate your sandbox connection by clicking on the red Deactivate button.