APIC section contains information about Controllers, Tenants, Contexts, Bridge domains, Applications, Endpoint groups and Contracts.
Information about endpoints is not part of this section as it is present in ACI table.
For instructions how collect APIC related information please check Add Cisco APIC API.
Controllers tab contains list of all discovered controllers, their health and IP addresses.
Contexts tab contains list of all contexts, to which tenant they belong to, their pcTag and scope, unenforced mode and count of bridge domains which belongs to them.
Applications tab contains list of all configured applications, to which tenant they belong to and number of their endpoint groups. By selecting a number you will be redirected to Endpoint groups tab with filter applied to show all endpoint groups belonging to this application.
Endpoint groups tab contains list of all endpoint groups, tenant name and application they belong to. If they are members of Preferred group, how many contracts are associated with them and list of all their subnets. By selecting a number in a column Contracts you will be redirected to Endpoint groups - Contracts tab with filter applied to this endpoint group.