Api.box.com : Error "Grant credentials are invalid"

I created personal Box account and am attempting to request a token using the client ID and secret. I am getting the following error.

{“error”:“invalid_grant”,“error_description”:“Grant credentials are invalid”}

Here are my application settings and requests:

App access level : App + Enterprise access
Authentication method: Server Authentication (Client Credentials Grant)

curl -X POST https://api.box.com/oauth2/token
-d “grant_type=client_credentials”
-d “client_id=redacted”
-d “client_secret=redacted”
-d “box_subject_type=user”
-d “box_subject_id=redacted”

I am providing the user_id of my Box account as the box_subject_id.

Hello :wave:,

May I have the client id of the application? Also - when you say “personal” Box account - do you mean like a free account? If so, you would need to have access to the Admin Console/paid business and above account in order to use CCG applications.

Alex, Box Developer Advocate :avocado:

My client id is 3m9ft38gi9hc0z7ivn2z5qm6l07mnuhr.

It is a free account using my personal email address. It would be great if you could kindly grant temporary authorization for API testing purposes only. This is necessary since our company-provided enterprise account does not permit testing activities.