Http 400 - Unauthorized for this grant type

  • 1
  • Question
  • Updated 3 years ago
  • (Edited)
Dear RingCentral Support Team/Community Members,

For one of our application, we are using RingCentral Api to develop Send SMS feature. We’ve 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 we’ve tried to retrieve oAuth token.

 Thanks in advance!


Photo of Mark Willis

Mark Willis

  • 70 Points

Posted 3 years ago

  • 1
Photo of Tyler Long

Tyler Long, Official Rep

  • 9,828 Points 5k badge 2x thumb
It probably means your app doesn't support password authorization flow.

Please check this screenshot:  from this GitHub issue: