Hi @hemisuser1,
Thanks for sharing the details here.
Since I was going through the Error you're facing here i.e., "The request is missing a required parameter, includes an invalid parameter value, or is otherwise malformed." and after looking at your Request payload, I think I understand why it's throwing that error.
In general for this API Request, there are 5 query parameters which are crucial and those are -
- client_id
- client_secret
- grant_type
- redirect_uri
- code
Now, in your Request payload - I can already find the most of the fields are matching, however I see you're using a parameter code_verifier
I don't think this an acceptable parameter for this Request. The last one should be mentioned as client_secret.
You can refer to the screen shot as Jeff has shared in his reply, since all these parameters need to be inserted following 'Content-Type: application/x-www-form-urlencoded' and this is crucial.
So, in plain text with curl format, your Request should be -
curl --location --request POST 'https://webexapis.com/v1/access_token' \
--header 'Content-Type: application/x-www-form-urlencoded' \
--data-urlencode 'grant_type=authorization_code' \
--data-urlencode 'client_id=<clientId>' \
--data-urlencode 'client_secret=<clientSecret>' \
--data-urlencode 'redirect_uri=<uri>' \
--data-urlencode 'code=<code>'
And, please note - you don't need any Token to run this API.
Just to share, if you feel that first generating the code from OAuth Authorization URL is hectic before running the actual API Request, here is a Blog we've posted very recently to generate token from Postman in very very simple few steps.
I hope this blog might help you here - https://developer.webex.com/blog/generating-an-oauth-token-pair-using-a-webex-integration
Regards,
Sandip
