Here is an example how you can use the REST API on the BluecatDNSServer to query data via the workflow interface (alternatively you could use its API directly).
I am sure that you can use this concept for other web interfaces.

The script is a translation of a CURL request. It shows how to query the token and use this “BASIC Token” for further queries.

#BY J.Kühnis
#Invoke Webrequest/RestMethod to get IP Adress & Mac-Adress from Bluecat API
#translation of CURL Commands

############################
#   CURL sample
#
#Get TOKEN
#curl -k https://URL/rest_login -X POST -H "Content-Type: application/json" --data "{\"username\":\"your USERNAME\",\"password\":\"your USERNAME\"}"
#
#GET Request:
#curl -k https://URL/get_ip_infos/get_ip_infos_endpoint -X GET -H "auth: Basic ****SOME TOKEN****" -H "Content-Type: application/json" --data "{\"host\":\"SERVERNAME\"}"
#
#
#result:
#{
#  "ip": "some ip",
#  "mac": "some mac"
#}
############################




#Trust SelfSigned SSL/TLS Channel
add-type @"
    using System.Net;
    using System.Security.Cryptography.X509Certificates;
    public class TrustAllCertsPolicy : ICertificatePolicy {
        public bool CheckValidationResult(
            ServicePoint srvPoint, X509Certificate certificate,
            WebRequest request, int certificateProblem) {
            return true;
        }
    }
"@ 
[System.Net.ServicePointManager]::CertificatePolicy = New-Object TrustAllCertsPolicy


#Generate Web Token (Basic Token)
Function Get-WebTokenBasic{

    [CmdletBinding()]
    Param(
    [Parameter(Mandatory = $true)][string]$Username,
    [Parameter(Mandatory = $true)][string]$Password
    )

$json=ConvertTo-Json (@{"username"="$Username";"password"="$Password";})
$token = (Invoke-WebRequest -Uri "https://URL/rest_login"  -Body $json -ContentType "application/json" -Method POST).content | Out-String | ConvertFrom-Json

$token = $token.access_token
$global:headers = @{auth="Basic $token"}

}

#Get IP or Mac from Servername
Function Get-DNSBluecatValues{
[CmdletBinding()]
Param(
    [Parameter(Mandatory = $true)][string]$ServerName
    
)

$json4= (@{"host"="$servername";}) | ConvertTo-Json

Try
{
    Get-WebTokenBasic
    $result = Invoke-WebRequest -Uri "https://URL/get_ip_infos/get_ip_infos_endpoint" -Headers $headers -Body $json4 -Method Post -ContentType "application/json"
    $global:result = $result | ConvertFrom-Json
    return $global:result
}
Catch
{
    $ErrorMessage = $_.Exception.Message
    $FailedItem = $_.Exception.ItemName
    Write-Warning "Failed Authentication or Webrequest"
    Break
}


}