The API plan of services of an application determines, whether the sandbox or production environment will be targeted. The initial API plan for newly created applications allows you to access the sandbox environment. To access the production one, you need to request to change the API plan for services of your application to "Production Plan".

 

If you want to be able to call both the sandbox and production environments, you can create two applications: one with the sandbox API plan assigned to its services and another one with the production plan. Using the API key of the appropriate application you will then decide which environment to use.

 

 

In the Applications section select the application you want to change the API plan for and go to its edit mode:

 

Choose "Production Plan" in the Request Change to field:

 

 

Note that the Sandbox and Production URIs are identical.