Applications
Gaining access to the developer portal is the first step in accessing the resources related to the available APIs. There's no need to elaborate on this—if you're reading this documentation, you've successfully completed this first step.
The next essential step is to have an application. Every API integration revolves around it, and access rights are granted to applications rather than individuals.
Managing My Application
An application can have multiple subscriptions to different APIs, whether they are production APIs or not. There is no reason to have multiple applications unless you are managing multiple distinct products.
Logs
All logs identified as related to your application are available directly on the developer portal. Note that the level of logging depends on the type of API. A development-focused API will provide detailed logs, whereas a production API will offer less detailed logs.
Learn more about identifying your application's API calls in the dedicated section.