Hi @mosessefah 

From your single truth app create a list of devices. Use the API to add the devices to a NetBrain Discovery task and execute it (https://github.com/NetBrainAPI/NetBrain-REST-API-R11/blob/main/Golden%20Use%20Case%20Templates/Discovery%20and%20Devices%20Management%20by%20Calling%20APIs.md).

For comparison between NB and your single truth app, you can export a list of devices: https://github.com/NetBrainAPI/NetBrain-REST-API-R11/blob/main/REST%20APIs%20Documentation/Devices%20Management/Get%20Device%20Data%20API.md
or from the Single IP Table: https://github.com/NetBrainAPI/NetBrain-REST-API-R11/blob/main/REST%20APIs%20Documentation/Topology%20Management/Get%20One%20Ip-Table%20API.md
 

Regards

Carsten