ServiceNow

This PowerShell module provides a series of cmdlets for interacting with the ServiceNow REST API, performed by wrapping Invoke-RestMethod for the API calls.

IMPORTANT: Neither this module nor its creator are in any way affiliated with ServiceNow.

Version 2

Building on the great work the community has done thus far, a lot of new updates with this release.

Although still in the module for backward compatibility, Set-ServiceNowAuth is being replaced with New-ServiceNowSession. With this comes OAuth support, removal of global variables, and much more folks have asked for. The ability to provide credentials directly to functions has been retained for this release, but will be deprecated in a future release in favor of using New-ServiceNowSession.
Support for different api versions. Set-ServiceNowAuth will continue to use v1 of the api, but New-ServiceNowSession defaults to the latest. Check out the -ApiVersion parameter of New-ServiceNowSession.
Remove-ServiceNowAuth has been retained for this release, but as global variables have been removed, there is no longer a need for it; it will always return $true. It will be removed in a future release.
-PassThru added to remaining Update- and New- functions. Depending on your code, this may be a breaking change if you expected the result to be returned.
Pipeline support added to many functions
Standardizing on coding between all functions

Requirements

Requires PowerShell 5.1 or above.

Requires authorization in your ServiceNow tenant. Due to the custom nature of ServiceNow your organization may have REST access restricted. The following are some tips to ask for if you're having to go to your admin for access:

Out of the box tables should be accessible by granting the ITIL role.
Custom tables may require adjustments to the ACL.
The Web_Service_Admin role may also be an option.

Usage

The ServiceNow module should be installed from the PowerShell Gallery with install-module ServiceNow.

Creating a new session

Creating a new session will create a script scoped variable $ServiceNowSession which will be used by default in other functions.

Basic authentication with just a credential...

$params @{
    Url = 'instance.service-now.com'
    Credential = $userCred
}
New-ServiceNowSession @params

Oauth authentication with user credential as well as application/client credential. The application/client credential can be found in the System OAuth->Application Registry section of ServiceNow.

$params @{
    Url = 'instance.service-now.com'
    Credential = $userCred
    ClientCredential = $clientCred
}
New-ServiceNowSession @params

All examples below assume a new session has already been created.

Getting incidents opened in the last 30 days

$filter = @('opened_at', '-ge', 'javascript:gs.daysAgoEnd(30)')
Get-ServiceNowRecord -Table incident -Filter $filter

Retrieving an Incident Containing the Word 'PowerShell'

Get-ServiceNowIncident -MatchContains @{short_description='PowerShell'}

or new with v2.2

Get-ServiceNowRecord -Table incident -Filter @('short_description','-eq','PowerShell')

Update a Ticket

Get-ServiceNowIncident -Limit 1 -MatchContains @{short_description='PowerShell'} | Update-ServiceNowIncident -Values @{comments='Updated via PowerShell'}

Creating an Incident with custom table entries

$IncidentParams = @{Caller = "UserName"
            ShortDescription = "New PS Incident"
            Description = "This incident was created from Powershell"
            CustomFields = @{u_service = "MyService"
                            u_incident_type = "Request"}
            }
New-ServiceNowIncident @Params

Azure Connection Object (Automation Integration Module Support)

The module can use the Connection parameter in conjunction with the included ServiceNow-Automation.json file for use as an Azure automation integration module. Details of the process is available at Authoring Integration Modules for Azure Automation.

The Connection parameter accepts a hashtable object that requires a username, password, and ServiceNowURL.

Tests

This module comes with limited Pester tests for unit testing.

Scope & Contributing

Contributions are gratefully received, so please feel free to submit a pull request with additional features or amendments.

Authors

Contributors

Michael Dejulia

Dejulia489 / servicenow-powershell