Someone was looking for a way to find 'Tagless' NSX-T VMs. Seems like the NSX-T realized state endpoint was the way to go.

Get-NSXTVirtualMachineData.ps1

$Credential = Get-Credential
$skipcertcheck = $true
$AuthMethod = “Basic”
$NSXMgr=”NSXTManagerIPorDNSName”
$policyapi = "/policy/api/v1"
$base_url = ("https://" + $NSXMgr + $policyapi)

$endpoint = "/infra/realized-state/virtual-machines"
$Data = Invoke-restmethod -Uri ($base_url + $EndPoint) -Method GET -Credential $Credential -SkipCertificateCheck:$skipcertcheck -Authentication:$AuthMethod

#VMs without tags
$data.results | where {$_.tags -eq $null}

#VMs with tags
$data.results | where {$_.tags -ne $null}