diff --git a/Projects/DLL/SystemX.Core.dll b/Projects/DLL/SystemX.Core.dll
index 13fafeb..6413124 100644
Binary files a/Projects/DLL/SystemX.Core.dll and b/Projects/DLL/SystemX.Core.dll differ
diff --git a/Projects/SystemX.Core/SystemX.Core/Services/CommonService.cs b/Projects/SystemX.Core/SystemX.Core/Services/CommonService.cs
new file mode 100644
index 0000000..c108ac8
--- /dev/null
+++ b/Projects/SystemX.Core/SystemX.Core/Services/CommonService.cs
@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SystemX.Core.Services
+{
+    public class CommonService
+    {
+        public CommonService()
+        {
+        }
+
+    }//end class
+}
diff --git a/Projects/SystemX.Core/SystemX.Core/Services/HttpService.cs b/Projects/SystemX.Core/SystemX.Core/Services/HttpService.cs
new file mode 100644
index 0000000..7aa7cb0
--- /dev/null
+++ b/Projects/SystemX.Core/SystemX.Core/Services/HttpService.cs
@@ -0,0 +1,163 @@
+using Azure.Core;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net.Http.Json;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SystemX.Core.Services
+{
+    public class HttpService : CommonService
+    {
+        public HttpService()
+            : base()
+        {
+        }
+
+        /// <summary>
+        /// PostJsonAsync
+        /// </summary>        
+        /// <param name="url">https://127.0.0.1:443</param>       
+        /// <param name="timeOutSeconds">Range 5~30 secconds</param>       
+        public virtual async Task<RESPONSE?> PostJsonAsync<REQUEST, RESPONSE>(string url, REQUEST request, short timeOutSeconds = 5) where REQUEST : class where RESPONSE : class
+        {
+            RESPONSE? response = default(RESPONSE);
+            Guid guid = Guid.NewGuid();
+
+            using (HttpClient httpClient = new HttpClient(GetClientHandler()))
+            {
+                int retry = 0;
+                while (true)
+                {
+                    await Task.Delay(1);
+                    try
+                    {
+                        var timeOutSec = SetTimeout(timeOutSeconds);
+                        httpClient.Timeout = new TimeSpan(0, 0, timeOutSec);
+                        httpClient.BaseAddress = new Uri($"{url}");
+
+                        LogXnet.WriteLine($"[POST] Request({guid})::{url}{Environment.NewLine}{request?.ToJson()}", LogXLabel.HTTP);
+
+                        DateTime requestTime = DateTime.Now;
+                        var res = await httpClient.PostAsJsonAsync(url, request);
+                        response = await res.Content.ReadFromJsonAsync<RESPONSE>();
+
+                        LogXnet.WriteLine($"[POST] Rseponse({guid}) ({(DateTime.Now - requestTime).TotalSeconds} sec)::{url}{Environment.NewLine}{response?.ToJson()}", LogXLabel.HTTP);
+                        break;
+                    }
+                    catch (Exception e)
+                    {
+                        LogXnet.WriteLine(e);
+                        retry += 1;
+                    }
+
+                    if (retry > 1)
+                        break;
+                }
+            }
+
+            return response;
+        }
+
+        /// <summary>
+        /// GetJsonAsnyc
+        /// </summary>    
+        /// <param name="url">https://127.0.0.1:443</param>       
+        /// <param name="timeOutSeconds">Range 5~30 secconds</param>
+        public virtual async Task<RESPONSE?> GetJsonAsync<RESPONSE>(string url, short timeOutSeconds = 10) where RESPONSE : class
+        {
+            RESPONSE? response = default(RESPONSE);
+            Guid guid = Guid.NewGuid();
+
+            using (HttpClient httpClient = new HttpClient(GetClientHandler()))
+            {
+                try
+                {
+                    var timeOutSec = SetTimeout(timeOutSeconds);
+                    httpClient.Timeout = new TimeSpan(0, 0, timeOutSec);
+                    httpClient.BaseAddress = new Uri($"{url}");
+
+                    LogXnet.WriteLine($"[GET] Request({guid})::{url}", LogXLabel.HTTP);
+
+                    DateTime requestTime = DateTime.Now;
+                    response = await httpClient.GetFromJsonAsync<RESPONSE>(url);
+
+                    LogXnet.WriteLine($"[GET] Rseponse({guid}) ({(DateTime.Now - requestTime).TotalSeconds} sec)::{url}", LogXLabel.HTTP);
+                }
+                catch (Exception e)
+                {
+                    LogXnet.WriteLine(e);
+                }
+            }
+
+            return response;
+        }
+
+        /// <summary>
+        /// PutJsonAsnyc
+        /// </summary>    
+        /// <param name="url">https://127.0.0.1:443</param>       
+        /// <param name="timeOutSeconds">Range 5~30 secconds</param>
+        public virtual async Task<RESPONSE?> PutJsonAsync<REQUEST, RESPONSE>(string url, REQUEST request, short timeOutSeconds = 5) where REQUEST : class where RESPONSE : class
+        {
+            RESPONSE? response = default(RESPONSE);
+            Guid guid = Guid.NewGuid();
+
+            using (HttpClient httpClient = new HttpClient(GetClientHandler()))
+            {
+                int retry = 0;
+                while (true)
+                {
+                    await Task.Delay(1);
+                    try
+                    {
+                        var timeOutSec = SetTimeout(timeOutSeconds);
+                        httpClient.Timeout = new TimeSpan(0, 0, timeOutSec);
+                        httpClient.BaseAddress = new Uri($"{url}");
+
+                        LogXnet.WriteLine($"[PUT] Request({guid})::{url}{Environment.NewLine}{request?.ToJson()}", LogXLabel.HTTP);
+
+                        DateTime requestTime = DateTime.Now;
+                        var res = await httpClient.PutAsJsonAsync(url, request);
+                        response = await res.Content.ReadFromJsonAsync<RESPONSE>();
+
+                        LogXnet.WriteLine($"[PUT] Rseponse({guid}) ({(DateTime.Now - requestTime).TotalSeconds} sec)::{url}{Environment.NewLine}{response?.ToJson()}", LogXLabel.HTTP);
+                        break;
+                    }
+                    catch (Exception e)
+                    {
+                        LogXnet.WriteLine(e);
+                        retry += 1;
+                    }
+
+                    if (retry > 1)
+                        break;
+                }
+            }
+
+            return response;
+        }
+
+        protected HttpClientHandler GetClientHandler()
+        {
+            HttpClientHandler clientHandler = new HttpClientHandler();
+            clientHandler.ServerCertificateCustomValidationCallback = (message, cert, chain, sslPolicyErrors) =>
+            {
+                return true;
+            };
+
+            return clientHandler;
+        }
+
+        protected short SetTimeout(short timeOutSeconds)
+        {
+            short timeoutMin = 5;
+            short timeoutMax = 30;
+
+            timeOutSeconds = Math.Clamp(timeOutSeconds, timeoutMin, timeoutMax);
+
+            return timeOutSeconds;
+        }
+    }
+}