You can use any sort of HTTP client to make a request to the Dynatrace REST API. Here is a good link for more reading/help from Stackoverflow: https://stackoverflow.com/questions/3913502/restfu...
The article is a bit old but still valid. Then, I recommend using the API help documentation to find what you are trying to pull from Dynatrace: https://help.dynatrace.com/dynatrace-api/
Hope this helps!