KACE SMA API - "Unsupported Media Type" error when trying to delete an asset

Currently, I am able to get, create, and update assets using the Kace SMA API, but I get the following response when I try to delete an asset:

{"errorCode":-1,"errorDescription":"Unsupported Media Type"}

I'm sending a delete request as /api/asset/assets/{id}:

public class KaceClient
        public HttpClient Client { get; }
        public KaceClient(HttpClient client)
            Client = client; Client.BaseAddress = new Uri("https://kacesma/");
            Client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
            Client.DefaultRequestHeaders.Add("x-kace-api-version", "5");
    }public async Task<AssetPostResponse?> DeleteAssetInKace(int id)
            Uri = string.Format($"https://kacesma/api/asset/assets/{id}");
            await Login();
            using HttpRequestMessage request = new(HttpMethod.Delete, Uri);
            using HttpResponseMessage response = await _client.Client.SendAsync(request);
// The response I get back is the error I mentioned above
            var responseString = await response.Content.ReadAsStringAsync();
            var kaceApiResponse = JsonConvert.DeserializeObject<AssetPostResponse>(responseString);
            return kaceApiResponse;

As I mentioned, I have no issues sending GET, POST, and PUT requests, such as:

  • GET /api/asset/assets
  • GET /api/asset/assets/{id}
  • PUT /api/asset/assets/{id}
  • POST /api/asset/assets

Do I need to specify a different media type somewhere for deletes?  Removing the line...

Client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

...does not resolve the issue.

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Answers (2)

Answer Summary:
Posted by: Hobbsy 1 year ago
Red Belt

I would log a KACE support ticket if I was you.....

  • Thanks for the suggestion! I did find a resolution / work-around, which I'll post in the answer section. - CoryHatter@BoydCat.com 1 year ago
Posted by: CoryHatter@BoydCat.com 1 year ago
Senior White Belt

Top Answer

Strangely, adding a blank body to the request allows it to complete:

request.Content = new StringContent("", Encoding.UTF8, "application/json");
                request.Content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/json");

Considering this is a DELETE request, I wouldn't expect a body to be required.

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