For ease of development, Modern Treasury provides both live and test environments for end-users. When using the web application, most pages will display a "Live/Test" toggle that allows you to switch between both environments in the same session. When using the API, your use of the Live or Test keys will determine which environment you interact with.
Some resources are environment-independent, meaning they have no Live/Test distinction and changes to these shared resources are visible across both environments. This is done in part to speed development and allow a cleaner experience when building your application. Currently the following resources are shared: Organizations and Users.