Calling a Web API from another Web API project

I got three Web API project.

They deployed at

1. api:http://api.domain.com
2. mobileApi:http://mobile.api.domain.com
3. logApi:http://log.api.domain.com

I want do this: When an error occured in other project,record the error by calling a controller in logApi.I have read http://www.asp.net/web-api/overview/web-api-clients/calling-a-web-api-from-a-net-client

So I write this class for helping send request to a Web API controller

public class WebApiRequest
{
    public static T Get<T>(string url, object param = null, object header = null, Func<HttpResponseMessage, T> converter = null)
    {
        HttpClient client = GetClient(header);
        url = UrlHelper.BuildUrl(url, param);
        HttpResponseMessage response = client.GetAsync(url).Result;
        response.EnsureSuccessStatusCode();
        return converter != null ? converter(response) : DefaultConverter<T>(response);
    }

    public static T Post<T>(string url, object param = null, object header = null, Func<HttpResponseMessage, T> converter = null)
    {
        HttpClient client = GetClient(header);
        var content = new FormUrlEncodedContent(
            Tool.AnonymousObjectToDictionary(param).Where(i => i.Value != null).ToDictionary(i => i.Key, i => i.Value.ToString()));
        HttpResponseMessage response = client.PostAsync(url, content).Result;
        response.EnsureSuccessStatusCode();
        return converter != null ? converter(response) : DefaultConverter<T>(response);
    }

    public static T Put<T>(string url, object param = null, object header = null, Func<HttpResponseMessage, T> converter = null)
    {
        HttpClient client = GetClient(header);
        var content = new FormUrlEncodedContent(
            Tool.AnonymousObjectToDictionary(param).Where(i => i.Value != null).ToDictionary(i => i.Key, i => i.Value.ToString()));
        HttpResponseMessage response = client.PutAsync(url, content).Result;
        response.EnsureSuccessStatusCode();
        return converter != null ? converter(response) : DefaultConverter<T>(response);
    }

    public static T Delete<T>(string url, object param = null, object header = null, Func<HttpResponseMessage, T> converter = null)
    {
        HttpClient client = GetClient(header);
        url = UrlHelper.BuildUrl(url, param);
        HttpResponseMessage response = client.DeleteAsync(url).Result;
        response.EnsureSuccessStatusCode();
        return converter != null ? converter(response) : DefaultConverter<T>(response);
    }

    private static T DefaultConverter<T>(HttpResponseMessage response)
    {
        var formatters = new List<MediaTypeFormatter> {
            new JsonMediaTypeFormatter(),
            new XmlMediaTypeFormatter()
        };
        var result = response.Content.ReadAsAsync<T>(formatters).Result;
        return result;
    }

    public static string StringConverter(HttpResponseMessage response)
    {
        return response.Content.ReadAsStringAsync().Result;
    }

    private static HttpClient GetClient(object header)
    {
        HttpClient client = HttpClientFactory.Create(new DecompressionHandler());
        var headers = Tool.AnonymousObjectToDictionary(header);
        foreach (var h in headers.Where(h=>h.Value!=null)) {
            client.DefaultRequestHeaders.Add(h.Key, h.Value.ToString());
        }
        return client;
    }
}

In a test project,It works perfect.

But when I use it in a Web API project,things become very strange.

    WebApiRequest.Post<ReturnModel<int>>(logUrl, new {
        Source = "{" + source + "}",
        context.Exception.Message,
        context.Exception.StackTrace,
        ExceptionType = context.Exception.GetType().FullName,
        PriorityLevel = 3,
        AddTime = DateTime.Now,
        ProjectType = (short)ProjectType.WebApi,
    }, request.Headers);

The code seems OK,but actually the HttpClient is not request the url I give to it!!

Anyone can help, I appreciate it and thanks a lot.