topic Re: 401 unauthorized error while accessing Rest api URL-Powershell in ONTAP Discussions

401 unauthorized error while accessing Rest api URL-Powershell

ashish9711 — Wed, 04 Jun 2025 11:04:41 GMT

Any Idea on resolving these kind of errors
Code
PS C:\Users\administrator.DEMO.000> $UserName ="admin"

$ControllerPassword =ConvertTo-SecureString “Netapp1!” -AsPlainText -Force
$ControllerCredential = New-Object System.Management.Automation.PsCredential($UserName,$ControllerPassword)

$url="
https://192.168.0.71/rest/v1/aggregates?limit=20
"
$a=Invoke-RestMethod -Uri $url -Method Get -Credential $ControllerCredential
$a
$a[0]

Output
Invoke-RestMethod : Error 401 - Unauthorized
Please go back to the homepage and try again.
At line:10 char:4
+ $a=Invoke-RestMethod -Uri $url -Method Get -Credential $ControllerCredential
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidOperation: (System.Net.HttpWebRequest:HttpWebRequest) [Invoke-RestMethod], WebExceptio
n
+ FullyQualifiedErrorId : WebCmdletWebResponseException,Microsoft.PowerShell.Commands.InvokeRestMethodCommand
Cannot index into a null array.
At line:12 char:1
+ $a[0]
+ ~~~~~~~
+ CategoryInfo : InvalidOperation: (:) [], RuntimeException
+ FullyQualifiedErrorId : NullArray

PS C:\Users\administrator.DEMO.000>

Re: 401 unauthorized error while accessing Rest api URL-Powershell

GidonMarcus — Thu, 18 Jun 2020 09:51:36 GMT

Hi, see post from earlier this month.

https://community.netapp.com/t5/ONTAP-Rest-API-Discussions/credentials-with-powershell/td-p/156757

Re: 401 unauthorized error while accessing Rest api URL-Powershell

ashish9711 — Thu, 18 Jun 2020 12:58:55 GMT

@GidonMarcus : None of the solutions listed in the link contains solution to my question.

Re: 401 unauthorized error while accessing Rest api URL-Powershell

ashish9711 — Thu, 18 Jun 2020 14:17:32 GMT

Got it fixed. OCUM uses a different accept parameter in header variable compared to other gui's