There are two approaches to displaying a list of a user's resources in your own portal or application depending on your subscription and needs.
MyAthens RSS feeds
There are two authenticated RSS feeds available that list the resources of the logged in user. Whilst primarily intended for use by the MyAthens toolbar, the addresses are available to all:
The feeds can only be viewed after the user has logged in so you would need to allow for this in your portal or application design.
If your subscription includes API access, an API An API call can be made for any user ID of your users' IDs to return a list of available services and key information about those services including title, link and description. If you can predict a user's permission set(s) without identifying the specific user, you could use a consistent user ID to obtain this information; if not you would need to identify the user before sending the API call.
For details, please see your API documentation. the documentation you would have been sent when you requested an API key.
If you are interested in getting access to the API, please contact your account manager or the service desk.