azureauthenticationpower-automate

Error: AADSTS900144 - Missing 'grant_type' Parameter in Request Body

I am encountering an issue while working with Azure Active Directory authentication. Specifically, I am receiving the following error message:

{"error":"invalid_request","error_description":"AADSTS900144: The request body must contain the following parameter: 'grant_type'.}

Here is the context of my request:

Endpoint: https://login.microsoftonline.com/{tenantId}/oauth2/v2.0/token Request Method: POST Headers: "Content-Type" : "application/x-www-form-urlencoded" Request Body:

{
  "grant_type": "client_credentials",
  "client_id": {client_id},
  "client_secret": {client_secret},
  "scope": "https://graph.microsoft.com/.default"
}

Can someone please guide me on how to correctly include the 'grant_type' parameter in the request body? Any examples or insights into what might be causing this issue would be greatly appreciated.

Thank you in advance for your help!

I have ensured that the request body includes other necessary parameters, but the 'grant_type' parameter seems to be missing or incorrectly specified.

Solution

  • The error occurred as you are passing wrong Content-Type while generating the token.

    Initially I got the same error:

    enter image description here

    I agree with @juunas, either change Content-Type to "application/json" and pass json data OR with Content-Type : application/x-www-form-urlencoded pass body as form-encoded POST parameters.

    I passed the body as parameters like below to resolve the error:

    https://login.microsoftonline.com/TENANTID/oauth2/v2.0/token

client_id:ClientID
client_secret:ClientSecret
grant_type:client_credentials
scope:https://graph.microsoft.com/.default

    enter image description here

    Otherwise, you can also change the Content-Type to "application/json" and pass json data only