How to write a Test/Demo App that does not go through the square backend?

[minrajnepali]

How to write a Test/Demo App that does not go through the square backend?

[BofBArtStudio]

Assuming that you are utilizing the API, when you log into your API Developer Dashboard, you can choose to create a Sandbox Test Account so that you can test your integrations without it affecting your live transactional account.