Microsoft Store API v9 test.ps1

$appId = ""
$appSecret = ""

$body = @{    
    grant_Type    = "client_credentials"
    scope         = "https://graph.microsoft.com/.default"
    client_Id     = $appId
    client_Secret = $appSecret 
} 

$appName = "Windows Subsystem for Android"
$storeSearchUrl = "https://storeedgefd.dsx.mp.microsoft.com/v9.0/manifestSearch"
$body = @{
    Query = @{
        KeyWord   = $appName
        MatchType = "Substring"
    }
} | ConvertTo-Json
$appSearch = Invoke-RestMethod -Uri $storeSearchUrl -Method POST -ContentType 'application/json' -body $body
$exactApp = $appSearch.Data | Where-Object { $_.PackageName -eq $appName }

$appUrl = "https://storeedgefd.dsx.mp.microsoft.com/v9.0/packageManifests/9P3395VX91NR" -f $exactApp.PackageIdentifier
$app = Invoke-RestMethod -Uri $appUrl -Method GET 
$appId = $app.Data.PackageIdentifier
$appInfo = $app.Data.Versions[-1].DefaultLocale  | ConvertTo-Json
$appInstaller = $app.Data.Versions[-1].Installers
Write-Host "appId: $appId"
Write-Host "appInfo: $appInfo"
Write-Host "appInstaller: $appInstaller"