Error message " The grant type was not specified in the request" while trying to get the access token using POST method in flow

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Posted on by vnguyen1

I am using Post method try to get the access token thru Oauth 2.

URI:https://apiv2.webdamdb.com/oauth2/token.php

Body :

grant_types=@{variables('grant_type')}&client_id=@{variables('client_id')}&client_secret=@{variables('client_secret')}&username=@{variables('username')}&password=@{variables('pw')}

and got the error messsage below

{
"error": "invalid_request",
"error_description": "The grant type was not specified in the request"
}

any suggestion ? Thanks

Note: i was able to run this in Postman without any issue

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v-yamao-msft Microsoft Employee on at

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Hi @vnguyen1 ,

The error message says that the grant type was not specified in the request.

From the info you provided, a variable is used for the grant_type. How is the variable configured?

From the following doc we know that, to request an access token, the grant_type should be authorization_code for the authorization code flow.

Please make sure you have specified the grant type properly.

Here is the link of the doc:

https://docs.microsoft.com/en-us/azure/active-directory/develop/v2-oauth2-auth-code-flow

Best regards,

Mabel
vnguyen1 40 on at

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hi @v-yamao-msft , thanks for your response
the grant_type=password that is how i define in here. i tried to put grant_type in headers, body ,... it still the same error message. In Postman, it put grant_type=password in body. it works fine. i did establish the other connection using Oauth 2 with grant_type=client_credentials in FLOW; it works completely fine. Not sure why i keep getting the error message. any suggesstion ? Thanks
Aurelien 3 on at

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Hello,

I got the same problem. After hours and hours of headache: the body must be JSON formated...

From
Body :
grant_types=@{variables('grant_type')}&client_id=@{variables('client_id')}&client_secret=@{variables('client_secret')}&username=@{variables('username')}&password=@{variables('pw')}
To
{ "grant_types":@{variables('grant_type')}, "client_id":@{variables('client_id')}, "client_secret":@{variables('client_secret')}, "username":@{variables('username')}, "password":@{variables('pw')} }
Maybe you will have to add double quotes arround your values, but anyway, this is the solution.

Regards!