400 bad request in graph API but same working in postman

Sagar Kumar 0 Reputation points
2023-05-10T13:02:04.53+00:00

I am trying to hit a Get method - https://graph.microsoft.com/v1.0/me but I am getting 400 bad request. But the same API is working in Postman, with token

Microsoft Graph
Microsoft Graph
A Microsoft programmability model that exposes REST APIs and client libraries to access data on Microsoft 365 services.
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  1. David Broggy 5,701 Reputation points MVP
    2023-05-10T14:59:39.0566667+00:00

    Hi Sagar,

    There's a good article in Medium for using/testing graph connections.

    https://mauridb.medium.com/calling-azure-rest-api-via-curl-eb10a06127

    As you may know, it's a 2 step process:

    • request a token using a POST request

    -query your resource

    To get your token, you need to go here:

    curl -X POST -d 'grant_type=client_credentials&client_id=[APP_ID]&client_secret=[PASSWORD]&resource=https%3A%2F%2Fmanagement.azure.com%2F' https://login.microsoftonline.com/[TENANT_ID]/oauth2/token

    Note that you will need to create a service principal for the above command.

    The article shows a clever way to do it with az commands but I usually configure an app registration in Azure.

    Then you can query your resource with your token.

    Remember there's a different url for every resource so you really need to know what you're looking for. The example in the article I mentioned is looking at the list of subscriptions for a given tenant:

    curl -X GET -H "Authorization: Bearer [TOKEN]" -H "Content-Type: application/json" https://management.azure.com/subscriptions/[SUBSCRIPTION_ID]/providers/Microsoft.Web/sites?api-version=2016-08-01

    Hope that helps.

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