Summary
Once you have accessed the developer portal with your credentials, you can access the APIs catalog and its documentation.
APIs Catalogue
In the APIs Catalog you could learn about available APIs and access their documentation.
API documentation
When you access an API, you may know your documentation.
We could only access the detail of methods that are public or private, if your user has been granted access.
In the detail of a method you could know its documentation, parameters, data dictionaries, SLO and limits. In addition, you can export the specification into OpenAPI or copy fragments of code available to facilitate adoption.