Latest version of a NuGet package in PowerShell

FindLatestNuGetVersion.ps1

# See: https://docs.microsoft.com/en-us/nuget/api/service-index
$serviceIndex = Invoke-RestMethod "https://api.nuget.org/v3/index.json"
$searchUrl = $serviceIndex.resources `
    | ? { ($_ | Select -ExpandProperty "@type") -eq "SearchQueryService" } `
    | % { $_ | Select -ExpandProperty "@id" } `
    | Select-Object -First 1

$packageId = "NuGet.Versioning"
$includePrerelease = $true

# See: https://docs.microsoft.com/en-us/nuget/api/search-query-service-resource#search-for-packages
$searchQueryUrl = "$($searchUrl)?q=packageid:$packageId&prerelease=$includePrerelease"
$searchResults = Invoke-RestMethod $searchQueryUrl

if ($searchResults.totalHits -lt 1) {
    Write-Output "No results found for $packageId (include prerelease = $includePrerelease)."
    exit
}

$latestVersion = $searchResults.data[0].version
Write-Output "The latest version of $packageId is $latestVersion."

Output.txt

The latest version of NuGet.Versioning is 4.4.0.