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mark-willis3151 avatar image
mark-willis3151 asked Phong Vu commented

Http 400 - Unauthorized for this grant type

Dear RingCentral Support Team/Community Members,


For one of our application, we are using RingCentral Api to develop Send SMS feature. Weve followed steps as per RingCentral help documentation to generate OAuth token to send sms. We are NOT able to identify root cause why following api returns 400 error?


Can you please help us to sort out this issue? Please refer following snaps that weve tried to retrieve oAuth token.

Thanks in advance!

!

sdk
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3 Answers

Tyler Liu avatar image
Tyler Liu answered
It probably means your app doesn't support password authorization flow.

Please check this screenshot:  https://cloud.githubusercontent.com/assets/733544/18026560/b93e5356-6c7d-11e6-92a9-d35d28325e69.png  from this GitHub issue:  https://github.com/ringcentral/ringcentral-php/issues/39
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Anirban avatar image
Anirban answered

Make sure the application you created supports Password flow since your (grant_type=password) .

Please note, application created with different platform type will have different grant_type.

for more info, here is wonderful way it has answered with animated Gif image that will easily help you to understand the process: https://stackoverflow.com/questions/47692828/ringcentral-auth-token-failed-in-curl-call-unauthorized-for-this-grant-type/47745436#47745436

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Cao Anh Dung avatar image
Cao Anh Dung answered Phong Vu commented

Now, That not trust. Any have more solution for that. I couldn't find the setting on Password follow.

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Phong Vu avatar image Phong Vu ♦♦ commented ·

Check this announcement.

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Developer sandbox tools

Using the RingCentral Phone for Desktop, you can dial or receive test calls, send and receive test SMS or Fax messages in your sandbox environment.

Download RingCentral Phone for Desktop:

Tip: switch to the "sandbox mode" before logging in the app:

  • On MacOS: press "fn + command + f2" keys
  • On Windows: press "Ctrl + F2" keys