Azure: create a new API Management service without a service URL - azure

Question

My intent is to configure an API (e.g. an Azure Function) into an API Manegement service using only policies. I don't want to specify a Service URL.
This is possible using Portal UI:
but not using PowerShell Az module.
Following code:
New-AzApiManagementApi -Context $context -Name $fullName -Protocols #('https') `
-Path $path -ProductIds #($product) `
-ApiVersionSetId $apiMgmtVersion.ApiVersionSetId
raises this exception:
Error : Unable to create 'news' managed API version 1.
Cannot validate argument on parameter 'ServiceUrl'. The argument is null or empty. Provide an argument that is not null or empty, and then try the
command again.
At C:\Projects\Intranet.ai\component_tools\Install-ApiMgmt.ps1:105 char:76
+ ... able to create '$fullName' managed API version $version.`n$_" | Error
+ ~~~~~
+ CategoryInfo : NotSpecified: (:) [Write-Error], WriteErrorException
+ FullyQualifiedErrorId : Microsoft.PowerShell.Commands.WriteErrorException,Error
Is there a way to define an API without a service URL? Maybe using directly New-AzResource?
Thanks to anyone who will help!

Answer 1

Is there a way to define an API without a service URL? Maybe using directly New-AzResource?
The New-AzApiManagementApi seems not support that, you could use the New-AzResource directly, please try the sample below, it works on my side.
$PropertiesObject = #{
"name" = "test22"
"serviceUrl" = $null
"path" = "testaaa"
"protocols" = #("https")
}
New-AzResource -PropertyObject $PropertiesObject -ResourceGroupName <Group-name> -ResourceType Microsoft.ApiManagement/service/apis -ResourceName "<API-management-servie-name>/test22" -ApiVersion 2018-01-01 -Force
Check in the portal:
Update:
If you want to include the apiVersionSetId, please try the one below.
$versionSet = Get-AzApiManagementApiVersionSet -Context $context -ApiVersionSetId "d41e7f92-9cf8-48fb-8552-d9ae5d4690d3"
$Id = $versionSet.Id -replace "apiVersionSets","api-version-sets"
$PropertiesObject = #{
"name" = "test22"
"serviceUrl" = $null
"path" = "testaaa"
"protocols" = #("https")
"apiVersionSetId" = $Id
}
New-AzResource -PropertyObject $PropertiesObject -ResourceGroupName <Group-name> -ResourceType Microsoft.ApiManagement/service/apis -ResourceName "<API-management-servie-name>/test22" -ApiVersion 2018-01-01 -Force