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  • 1.  Rest API Call - 407 Authentication required

    Posted 11-07-2019 07:20
      |   view attached
    Hi Experts,

    I had invoked restful API hosting in azure from Object and received below error.

    Internal : Unexpected error Error during Web API HTTP Request
    HTTP Status Code: 407
    HTTP Response Content: <HTML><HEAD>
    <TITLE>Access Denied</TITLE>

    This is because, form our network it has to go through proxy authentication to access external URI. 
    If i am browse to any external website from resource PC, then i am able to proceed run the object and get the response content. otherwise it will return 407 error.

    This issue because of calling an external URI require a proxy authentication. How to call a rest API with enter the proxy authentication?


  • 2.  RE: Rest API Call - 407 Authentication required
    Best Answer

    Posted 11-08-2019 12:28
    The WebAPI feature of Blue Prism does not support proxy authentication. If the is a requirement there is a REST web service VBO available on the Digital Exchange that I believe supports this. If not, the alternative would be to use a code stage and invoke the .Net HttpWebClient object directly. With that, you can definitely set up proxy authentication.

    Eric Wilson
    Director, Partner Integrations for Digital Exchange
    Blue Prism

  • 3.  RE: Rest API Call - 407 Authentication required

    Posted 11-11-2019 01:59
    Hi Eric,

    Thank you very much on your response.
    Will do it via code stage.


  • 4.  RE: Rest API Call - 407 Authentication required

    Posted 08-19-2020 02:31
    Hi Shah,

    Were you able to handle the proxy authentication via code stage?

    Aravinda Misra

  • 5.  RE: Rest API Call - 407 Authentication required

    Posted 08-23-2020 15:29
    Hi Aravindra,
    Yes i had use it in code stage.
    I am using below in code stage

    HttpWebRequest request = (HttpWebRequest)WebRequest.Create("");

    IWebProxy proxy = request.Proxy;
    string URI = string.Empty;
    if (proxy != null)
    URI = proxy.GetProxy(request.RequestUri).AbsoluteUri;


    WebProxy myProxy = new WebProxy();
    Uri newUri = new Uri(URI);
    myProxy.Address = newUri;
    myProxy.Credentials = new NetworkCredential(UserName, Password,"MyDomain");
    request.Proxy = myProxy;
    var client = new HttpClient();
    var uri = "";
    var response = client.GetAsync(uri);


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