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Since ServiceNow requires OAuth configuration in your instance, you need to manually configure two OAuth apps in your ServiceNow instance to grant access tokens and authenticate requests to the REST API.Please follow the steps below to set up the required OAuth applications.

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Create External Client OAuth App

1

Access ServiceNow Developer Portal

Sign into your ServiceNow Developer Portal account to create or access an instance.
2

Navigate to Application Registry

Go to System OAuth > Application Registry.Find the OAuth Client option under the ServiceNow application registry
3

Create New Application

Create a new app by selecting New in the top right corner.Create a new ServiceNow application under the OAuth Clients section in the Application Registry
4

Select OAuth API Endpoint

Choose Create an OAuth API endpoint for external clients.Create a new app, and make sure to choose the OAuth API endpoint for external clients option
5

Configure Application Settings

Name your app Pipedream. Use the default settings but specify the Redirect URL:
https://api.pipedream.com/connect/oauth/oa_g2oiqA/callback
6

Create and Verify

Click Create. The app will appear in the Application Registry once created.You should see the Pipedream app listed in the ServiceNow Registry after making those changes

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Create OAuth Validator App

1

Copy Credentials

Copy the client ID and secret from the Pipedream app you created above.
2

Create OAuth Provider App

Go back to System OAuth > Application Registry > New and select Connect to an OAuth Provider (simplified).
3

Configure Validator Settings

Name this app Pipedream OAuth Validator and add the previously copied client ID and secret.
4

Set Authorization Details

Set the grant type to Authorization Code and the Token URL to oauth_token.do.
5

Add Redirect URL

Use the same Redirect URL as before:
https://api.pipedream.com/connect/oauth/oa_g2oiqA/callback

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Connect to Pipedream

1

Access Pipedream Accounts

Visit Pipedream’s account page, and click Click Here to Connect An App.
2

Search for ServiceNow

Search for ServiceNow and select it.
3

Enter Connection Details

Enter the client ID, client secret, and your instance name (e.g., dev98042 from https://dev98042.service-now.com/).
4

Authorize Connection

Press Connect. A new window will prompt you to login to your ServiceNow instance, authorizing Pipedream’s access to the ServiceNow REST API.

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Troubleshooting

For Hardened or Mature Instances: The standard instructions may not apply perfectly to customized or hardened ServiceNow instances. If you face a 504 Gateway Time-out error or similar issues, consider these additional steps:
  • Assign a dedicated role and service account for this integration
  • Ensure the role has ACLs configured for the oauth_credential table and other necessary tables
For detailed authorization flow reference, see ServiceNow’s OAuth documentation.