To work with the Vonage Business Cloud APIs, you must create a Vonage Business Cloud Application.
Note: To avoid confusion, "Application" in this context refers to a logical grouping of APIs. The application you are building to consume these APIs will be referred to as "application".
Sign into Vonage UC Extend using your Vonage Business Cloud credentials and select "Vonage Business Cloud" from the Platform drop down list.
Select "My Applications" from the left-hand navigation menu.
Click "Add Application" at the top of the page.
In the Add Application dialog, enter a name and optionally a description for your Application, so that you can locate it easily later. You can limit the maximum number of requests that each access token allows (see authentication) in the "Per Token Quota" dropdown. By default it is "Unlimited". Then click the "Add" button.
Now that you have created your Application, you need to configure authentication to enable it to use the VBC APIs.