Hi, Here is the collection: https://github.com/CiscoDevNet/dne-dna-code/blob/master/intro-mdp/postman/DevNet%20Learning%20Labs-%20Intro%20to%20Model%20Driven%20Programmability.postman_collection.json Every call which uses this auth... Basic cm9vdDpEX1ZheSFfMTAm ...should replace it with this auth... Basic ZGV2ZWxvcGVyOmxhc3RvcmFuZ2VyZXN0b3JlYmFsbDg4NzY= This is based on the newish credentials in this sandbox: https://devnetsandbox.cisco.com/RM/Diagram/Index/27d9747a-db48-4565-8d44-df318fce37ad?diagramType=Topology I have tested it 