OAuth 2.0 getting access token issue on postman

[Sreedhar M]

I'm trying to generate the access/refresh tokens using postman.

I have given Get method and provided the instance url as https://xxxxxx.service-now.com/oauth_token.do and under headers section, provided all the required key value pairs, like client id, secret, username, password and grant type.

And when I hit Send button , getting the below error,

{

   "error_description": "access_denied",

   "error": "server_error"

}

please help me to get the tokens.

[Sreedhar M]

From Servicenow, I'm using Rest Message and adding the OAuth 2.0 as Authentication and adding the profile which I have created using the Provider instance client id and client secret. And I'm getting the token from the Rest message using 'Get Auth Token' and I'm giving simple user details to get the token and it is generating the token and able to test from default Get HTTP Method successfully with 200 response. Not using admin user to generate token here. But when I try to get token from postman, getting issue.

[Ankur Bawiskar]

Hi,

I believe you are getting confused

REST Message is configured when you wish to consume 3rd party endpoint

But your question talks about getting access token generated by ServiceNow

Regards
Ankur

[Sreedhar M]

@Ankur Bawiskar  I was under impression that we can generate tokens from postman or 3rd party instance. Because when i generate tokens on 3rd party instance(snow) from Rest Message it had generated the tokens on source instance(provider) also. Now I'm really confused. Please correct me.

[Ankur Bawiskar]

Hi,

So here is an example

1) ServiceNow is the provider of REST API and wants 3rd party to use OAuth to access it's endpoint

Another example

2) ServiceNow is the consumer of REST API given by 3rd party so you will have to create REST Message to consume their endpoint and use OAuth if 3rd party has shared the details for the same

Regards
Ankur

[Sreedhar M]

@Ankur Bawiskar these two steps I understood and that is how I did in my practice after watching your video and some other videos and your blog. My only issue is, POSTMAN not generating the tokens as part of testing.