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Question

unable to text JWT authorization using Postman

  • November 21, 2023
  • 4 replies
  • 159 views

I am testing 'JWT authorization flow' but getting error
"errorCode": "OAU-250",

"message": "Unsupported grant type"

using : https://platform.devtest.ringcentral.com/restapi/oauth/token

1700575856403.png


1700576037796.png

I don't want to use SDK as I will deploy on MS-SQL Server.

4 replies

PhongVu
Community Manager
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  • Community Manager
  • November 21, 2023

Can you double check the grant type of your app to see if it is JWT auth flow? Or let me know the app client id.


  • Author
  • New Participant
  • November 21, 2023

tried on Powershell too
1700579742176.png


App client Id: avDmFoV208obAVOTmKzqMu

Auth flow is JWT only


  • Author
  • New Participant
  • November 21, 2023

So working Powersell Code to get the access token using JWT is

1700589246521.png


DO NOT pass 'body' as below

1700589314976.png


  • Author
  • New Participant
  • November 21, 2023

same for Postman looks like

1700589378348.png