Does Paessler offer formal PowerShell modules, or do they support the PrtgAPI on GitHub (https://github.com/lordmilko/PrtgAPI)?
Paessler does not provide any language specific libraries for interfacing with their API; the only API available for PRTG is the raw HTTP API.
While certain Paessler engineers are familiar with PrtgAPI may choose to recommend or answer queries in some circumstances, PrtgAPI is otherwise completely unsupported by Paessler, and I would say questions should not be directed towards them.
However, That is a comprehensive integration test suite in place to validate that all features of PrtgAPI continue to work in newer versions of PRTG, and a comprehensive wiki detailing all the features of the library with examples on how to use them.
For any issues or queries, you can raise an issue on the GitHub project
Disclaimer:
The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.