To update my opening thread, I got this working, and it's now on Github.
https://github.com/jasonbarbee/dnac-bulk
The Public APIs on 1.1 seem limited right now. I couldn't find what I wanted to do in the public APIs.
I had to use Inspector on Firefox and inspect the actual calls that the DNA web interface used to reverse engineer the requests from the Javascript front end side, then replicate and rebuild API calls by hand in python...
So after I inspected the Host On Boarding page API calls, I built a python script to handle these calls and we've cutover many DNA Fabric switches using the script, and gradually improved it over the past couple months. We have many more to go over the next few months, and the tool works great, and has some common error handling, and it's actively being improved to make our cutover process smooth.
For your Assurance question, you will just have to do what I did and reverse engineer the APIs from the web page - until Cisco releases Assurance API interfaces.
Your API / Swagger question - they moved it - used to be /swagger in DNA 1.0, but 1.1 it was changed to /dna/apitester
There are some other API guides on DevNet, but again, they just didn't give me the answers I needed.
Most of the APIs I wanted to use were not documented.
Currently I have a process worked out to convert an IOS config file to a YAML structure, then convert that into a simple CSV for my importing script, and then my script posts the configurations to DNA API for the fabric switch ports.
The script can convert, import, export, wipe switch port configs, and find mac addresses on the Fabric. We are on DNA 1.1.2.
Hopefully that answers most of your questions and gives you some direction,
