Invalid Authorization Request - During OAuth2 Authentication on n8n Zendesk Trigger Node | Community
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Invalid Authorization Request - During OAuth2 Authentication on n8n Zendesk Trigger Node

  • June 3, 2025
  • 1 reply
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Hi Devs, 

I'm trying to add Zendesk Trigger node on n8n platform and I'm using OAuth2 method, I have created a OAuth client under Apps and integration> APIs>Zendesk API>OAuth Clients. 
Entered Unique identifier, Client kind=Public, Redirect URLs (Got from n8n node), and secret key was generated. When I use these creds under Zendesk Node on n8n while adding OAuth2 creds I get error saying 

Invalid Authorization Request

invalid_request The request is missing a required parameter, includes an unsupported parameter or parameter value, or is otherwise malformed.

What am I missing here?

 

1 reply

Hi Lohith,
 
Are you including the code challenge parameters to enable PKCE?  PKCE is required for public client types.