We've got some .NET apps that connect to salesforce REST API through a connected app. We created a new full sandbox from production but the REST API won't connect with the error {"error":"unsupported_grant_type","error_description":"grant type not supported"}.

I've checked and double checked the connected app, the service account and the permissions and they're all correct.

Does anyone have any ideas on what's wrong?

  • Can you show the URL you're trying to hit with the secret and id redacted – Bryan Anderson Oct 29 '19 at 19:08
  • 1
    I had added the interface URL wrong! Thank you! – afandre Oct 29 '19 at 20:13

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