Hi Oz,
This requires some degree of customisation. You can customise the the views for a model under the Information tab as per our docops guide:
Customizing a Model's Information View - CA Spectrum - 10.2 to 10.2.3 - CA Technologies Documentation
However, to use an external REST API call and then format the returned output into a table, you would need to call a separate script that is launched from within the XML file that defines the view. For example, you could possibly add the <command> tag along with any necessary attributes (represented by {0} ) to be passed as parameters arguments and use it:
<command>PATH_TO_SCRIPT {0}</command>
<param>
<attribute>
...
</attribute>
</param>