SmartSheet - I am trying to get access token using Oauth

Question

I am trying to integrate Power Automate (Workflow service) with SmartSheet using OAuth 2.0

I have got the auth code successfully and when I finally try to get the token, it throws the message - 'You are not authorized to perform this action.' with error code 1004

I tried in Postman with the same result.

Putting a `client_id` and `client_secret` in your post is not a good idea. — Ryan Wilson, Oct 26 '20 at 20:15

score 1 · Accepted Answer · answered Oct 26 '20 at 21:46

I believe the problem is that you're specifying all 5 values via the Request Header. Only Content-Type is specified via the Header -- the other four parameters (client_id, client_secret, code, and grant_type) should be specified via the query string. You're getting the not authorized error because Smartsheet is looking for the value of client_id etc. in the query string but not finding it there.

For example, here are screenshots from Postman that show setting Content-Type via the Headers and the other four parameters via the Params:

Excellent - happy to help! – Kim Brandl Oct 27 '20 at 13:44 — Kim Brandl, Oct 27 '20 at 13:44

SmartSheet - I am trying to get access token using Oauth

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