Authentication API Debugger Not Authorised

I’m using Authentication API Debugger to test the Grant Password oauth endpoint and I’m hitting it with the following


“client_id”: “MY_CLIENT_ID”,
“connection”: “Username-Password-Authentication”,
“grant_type”: “password”,
“password”: “MY_PASSWORD”,
“scope”: “openid”,
“username”: “MY_USERNAME”

And I keep getting unauthorised - I’ve trolled through the doco for hours and I have the correct grant type and the password is definitely correct so I’m stuck as to what I’m doing wrong.

Any help gratefully appreciated.



1 Like

Hi @craig.wildgoat,

Welcome to the Auth0 Community!

I understand that you are encountering problems using the Authentications API Debugging, specifically with the Unauthorized error.

Having looked closely at your POST request, it appears that you are missing the client_secret parameter.

For example:

curl --request POST \
  --url 'https://YOUR_DOMAIN/oauth/token' \
  --header 'content-type: application/x-www-form-urlencoded' \
  --data grant_type=password \
  --data \
  --data password=pwd \
  --data audience=YOUR_API_IDENTIFIER \
  --data scope=read:sample \
  --data client_id=YOUR_CLIENT_ID \
  --data client_secret=YOUR_CLIENT_SECRET

You may find our docs on Resource Owner Password Flow useful:

Please let me know how this works for you.

Thank you.

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