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How to Get a Client ID for Microsoft Graph API Access in Postman
Question details
The user needs to find or generate an Application (client) ID to authenticate Microsoft Graph API requests within Postman.
- Product
- Microsoft Graph API
- Device & OS
- not provided
- Scenario
- Setting up API authentication in Postman to interact securely with Microsoft Graph services.
- Observed behavior
- The user requires the correct procedure to register an application in the Azure portal and retrieve the required credentials.
Ensure you have an active Microsoft Azure account with sufficient permissions to register new applications in Microsoft Entra ID.
Register an Application in Microsoft Entra ID
Create a new app registration in the Azure portal to generate the Application (client) ID required for Postman authentication.
To interact with the Microsoft Graph API, Postman needs an access token. This token is acquired by registering an application in Microsoft Entra ID (formerly Azure AD), which assigns a unique Client ID to your Postman environment.
Open your web browser, navigate to the Azure Portal (portal.azure.com), and log in with your Microsoft account.
Use the top search bar to find and select 'Microsoft Entra ID' (or 'Azure Active Directory').
From the left-hand menu, select 'App registrations', then click the 'New registration' button at the top.
Enter a recognizable name for your application (e.g., 'Postman Graph API'). Select the appropriate supported account types for your organization, and click 'Register'.
Once the application is created, you will be directed to its Overview page. Locate the 'Application (client) ID' field and copy the alphanumeric string. You will paste this into Postman's OAuth 2.0 configuration.
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Frequently Asked Questions
Why do I need a Client ID for Postman?
A Client ID uniquely identifies your registered application in Microsoft Entra ID. It allows Postman to securely request OAuth 2.0 access tokens on behalf of your application to interact with the Microsoft Graph API.
Where do I paste the Client ID in Postman?
In Postman, go to the 'Authorization' tab of your request or collection, select 'OAuth 2.0' as the type, and scroll down to the 'Configure New Token' section. Paste the copied ID into the 'Client ID' field.
What if I don't see Microsoft Entra ID in my Azure portal?
Microsoft Entra ID is the updated name for Azure Active Directory (Azure AD). If you don't see it on your dashboard, simply search for 'Azure Active Directory' or 'Microsoft Entra ID' in the main search bar at the top of the portal.
Where can I get more help with Microsoft Graph API authentication?
If you encounter complex permission errors or token issues, you can post your question in the Microsoft Graph Q&A Community using the 'Microsoft Graph Explorer API' category for expert assistance.
