Your credentials could not be authenticated: "Credentials are missing.". You will not be permitted..

[mh2022]

Hi,

Disclaimer: I'm not a ServiceNow expert as I am a developer on the "client side" so forgive me in advance for asking this. (Other people I work with are ServiceNow experts).  I use the Rest API Explorer fine to run a simple query to get all the incidents:

https://devXXXXX.service-now.com/api/now/table/incident?sysparm_limit=1

This works fine in-browser (as default admin user). when I copy the PowerShell script and try to run it from my PC I get the following message (which I'm certain I have the correct credentials aside from knowing the script is correct since I coped it from the REST API explorer page):

Invoke-RestMethod :
Access Denied
Access Denied (authentication_failed)
Your credentials could not be authenticated: "Credentials are missing.". You will not be permitted access until your credentials can be verified.
This is typically caused by an incorrect username and/or password, but could also be caused by network problems.
For assistance, contact your network support team.
At line:24 char:13
+ $response = Invoke-RestMethod -Headers $headers -Method $method -Uri ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidOperation: (System.Net.HttpWebRequest:HttpWebRequest) [Invoke-RestMethod], WebException
+ FullyQualifiedErrorId : WebCmdletWebResponseException,Microsoft.PowerShell.Commands.InvokeRestMethodCommand

I have run many PowerShell scripts in the past but this is a new environment so I'm not sure what the steps are within the ServiceNow application to allow Rest API queries? (I browsed the many forums articles and the closest ones I could find mentioned endpoints and in/out bound API setup none of which I know anything about or how to use. Any kind of detailed response would be greatly appreciated). Thanks again in advance!

[jaheerhattiwale]

@mh2022 Send the credentials as basic auth. It should work.

[mh2022]

I'm using the "default" PowerShell script ServiceNow provides which does default to "basic" so I know that part is good.

[reshmapatil]

Hi @mh2022 ,

1. Open User[sys_user] table in ServiceNow.
2. Create a new user and mark 'Web service access only' and 'Internal Integration User'
3. Use this user for authorization.
4. Select Authorization type as Basic Auth in PowerShell and pass username and password of ServiceNow user.

Note: We also have an option in ServiceNow to execute the PowerShell script.

Regards,

Reshma

**Please mark my answer correct or helpful based on the impact**

[mh2022]

I did mark those boxes and still have the same error message.