OAuth error - "Invalid Authorization Request. No such client"

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  • Sami Immonen

    Hi. There's no possible way to check Client ID through Zendesk UI, it was possible before the new UI was introduced in summer 2017. The only way to check your OAuth Client's ID now is to use curl.

    In the answer user is guided to check client's unique identifier. One cannot use unique identifier instead of client ID to make authorization request, am I right? Is there some sort of a misconception in the answer?

    I'm getting the same OAuth error - "Invalid Authorization Request. No such client" every time I try to authenticate my application with Zendesk. I've triple-checked that client ID used is the correct one but still not getting any other results than "No such client".

  • Bryan - Community Manager
    Zendesk Developer Support Team

    Hi Sami,

    The OAuth "Client ID" that should be used is the "Unique Identifier" value that's displayed in the Agent > API > OAuth Clients screen:

    If you're using the API, it's the "identifier" attribute returned by the /api/v2/oauth/clients endpoint. Make sure you're using this identifier value and not the 'id' value returned by the API, which is used only to uniquely identify the resource on Zendesk's side.

  • Aaron Jones

    This worked for me.

  • Nicole Saunders
    Zendesk Community Team

    Glad to hear it, Aaron!

  • Nathan Purcell

    For anyone encountering this error that is 100% sure the ID/secret are correct, the error can also occur if you have an incorrect redirect URL configured.


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