[Splunk Add-on for ServiceNow] Extended Document to Configure ServiceNow to collect data using the OAuth 2.0 - Client Credentials Grant Type authentication mechanism

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Updated:October 1, 2026

Document ID:SPLK051679

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Applicability

Splunk Enterprise Splunk Cloud Splunk Add-on for ServiceNow v9.0.0

Description

The Splunk Add-on for ServiceNow introduces support for the Client Credentials Grant Type authentication method beginning with version 9.0.0, offering a new option for OAuth-based account configuration.
This article provides a comprehensive guide on how to use the OAuth 2.0 Client Credentials Grant Type authentication method to collect data within the Splunk Add-on for ServiceNow. Follow these steps to establish a secure connection and efficiently pull data from ServiceNow using this modern authentication mechanism.

Investigation

ServiceNow supports several OAuth 2.0 grant types, with the default being the authorization_code grant type. By default, the client_credentials grant type is disabled. Through the necessary steps to enable and configure the client_credentials grant type in ServiceNow, allowing for streamlined and secure machine-to-machine authentication.

Resolution

The below steps need to be followed in the ServiceNow Console to enable client_credentials and configure it:

1. Enable Inbound Client Credentials Grant Type

Navigate to: All → sys_properties.list
Click New to add a new system property
Enter the following details:
- Name: glide.oauth.inbound.client.credential.grant_type.enabled
- Type: Boolean
- Value: true
Save the property.

2. Display Required Fields on the Application Registry Form : By default, the Default Grant Type and OAuth Application User fields are not visible on the Application Registry form. To add these fields:

Go to System OAuth → Application Registry.
Click New.
Select Create an OAuth API endpoint for external clients.
In the header menu,
choose Configure → Form Design.
In the Form Designer, drag and drop the Default Grant Type and OAuth Application User fields into the form layout.
Click Save to update the form

3. Create OAuth2 Client Credentials

Navigate to System OAuth → Application Registry.
Click New.
Select Create an OAuth API endpoint for external clients.
Fill in the required fields:
- Name: Enter a descriptive name for the integration.
- Client ID: This will be auto-generated.
- Client Secret: This will be auto-generated or entered as required.
- Default Grant Type: Select Client Credentials.
- OAuth Application User: Choose a valid ServiceNow user (use the search icon if needed).
Click Submit to create the OAuth client

4. Configure the Splunk Add-on for ServiceNow

Open the Splunk UI and navigate to the Splunk Add-on for ServiceNow.
In the account configuration section, enter the Client ID and Client Secret generated in the previous step.
Complete the configuration to enable secure, machine-to-machine data collection between Splunk and ServiceNow using the OAuth 2.0 Client Credentials Grant Type