When I'm executing a web service on "Advanced REST client (a chrome extension)", I'm getting this error constantly. I do need to get "access_token"

    error_description: "grant type not supported"
    error: "unsupported_grant_type"

And I'm passing my username, password (password+Security token), client_id, client_secret and grant_type(=password).

The url is https://ap1.salesforce.com/services/oauth2/token


1 Answer 1


The content-type HTTP header should be application/x-www-form-urlencoded - Check if that's set correctly. If not, you will get this error. Also, make sure The grant_type form parameter is set to your password (all lower case)

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.