I've been updating postman collections for myself for a while to make it easier to work with the Dynatrace API across multiple clusters, tenants and environments.
I have put the files on github now, maybe someone will find it usefull.
Setup is very quick, then you can just select the request and environment against which to execute it.
Here is a short guide:
Postman is available for free from postman.com.
Import (file -> import) the collection .json files for the APIs you want:
A separate collection for each, including all requests of that API, will be created:
For each of your dynatrace environments/tenants you want to use, add a postman environment via manage environments -> add:
The environment needs two variables (names are case sensitive!):