diff --git a/src/Backend/DiunaBI.UI.Shared/Extensions/ServiceCollectionExtensions.cs b/src/Backend/DiunaBI.UI.Shared/Extensions/ServiceCollectionExtensions.cs
index 7e59490..4c28233 100644
--- a/src/Backend/DiunaBI.UI.Shared/Extensions/ServiceCollectionExtensions.cs
+++ b/src/Backend/DiunaBI.UI.Shared/Extensions/ServiceCollectionExtensions.cs
@@ -1,5 +1,6 @@
 using Microsoft.Extensions.DependencyInjection;
 using DiunaBI.UI.Shared.Services;
+using DiunaBI.UI.Shared.Handlers;
 
 namespace DiunaBI.UI.Shared.Extensions;
 
@@ -7,10 +8,23 @@ public static class ServiceCollectionExtensions
 {
     public static IServiceCollection AddSharedServices(this IServiceCollection services, string apiBaseUrl)
     {
-        // HttpClient for API calls
+        // HttpClient for API calls with logging
         // Ensure BaseAddress ends with / for proper relative URL resolution
         var baseUri = apiBaseUrl.EndsWith('/') ? apiBaseUrl : apiBaseUrl + "/";
-        services.AddScoped(sp => new HttpClient { BaseAddress = new Uri(baseUri) });
+
+        services.AddTransient<HttpLoggingHandler>();
+
+        services.AddHttpClient<AuthService>(client =>
+        {
+            client.BaseAddress = new Uri(baseUri);
+        })
+        .AddHttpMessageHandler<HttpLoggingHandler>();
+
+        services.AddHttpClient<LayerService>(client =>
+        {
+            client.BaseAddress = new Uri(baseUri);
+        })
+        .AddHttpMessageHandler<HttpLoggingHandler>();
 
         // Services
         services.AddScoped<AuthService>();
diff --git a/src/Backend/DiunaBI.UI.Shared/Handlers/HttpLoggingHandler.cs b/src/Backend/DiunaBI.UI.Shared/Handlers/HttpLoggingHandler.cs
new file mode 100644
index 0000000..57b1c3b
--- /dev/null
+++ b/src/Backend/DiunaBI.UI.Shared/Handlers/HttpLoggingHandler.cs
@@ -0,0 +1,28 @@
+namespace DiunaBI.UI.Shared.Handlers;
+
+public class HttpLoggingHandler : DelegatingHandler
+{
+    protected override async Task<HttpResponseMessage> SendAsync(
+        HttpRequestMessage request,
+        CancellationToken cancellationToken)
+    {
+        Console.WriteLine($"🌐 HTTP Request: {request.Method} {request.RequestUri}");
+        Console.WriteLine($"   BaseAddress: {request.RequestUri?.GetLeftPart(UriPartial.Authority)}");
+        Console.WriteLine($"   Path: {request.RequestUri?.PathAndQuery}");
+
+        if (request.Headers.Authorization != null)
+        {
+            Console.WriteLine($"   Auth: {request.Headers.Authorization.Scheme} {request.Headers.Authorization.Parameter?[..Math.Min(20, request.Headers.Authorization.Parameter?.Length ?? 0)]}...");
+        }
+        else
+        {
+            Console.WriteLine($"   Auth: None");
+        }
+
+        var response = await base.SendAsync(request, cancellationToken);
+
+        Console.WriteLine($"   Response: {(int)response.StatusCode} {response.StatusCode}");
+
+        return response;
+    }
+}
diff --git a/src/Backend/DiunaBI.UI.Shared/Services/AuthService.cs b/src/Backend/DiunaBI.UI.Shared/Services/AuthService.cs
index 42b109e..f467767 100644
--- a/src/Backend/DiunaBI.UI.Shared/Services/AuthService.cs
+++ b/src/Backend/DiunaBI.UI.Shared/Services/AuthService.cs
@@ -36,7 +36,6 @@ public class AuthService
         {
             Console.WriteLine($"=== ValidateWithBackend: Sending Google credential for {email} ===");
             
-            // Wyślij Google credential do backendu
             var response = await _httpClient.PostAsJsonAsync("Auth/apiToken", googleCredential);
             
             if (response.IsSuccessStatusCode)
@@ -53,11 +52,9 @@ public class AuthService
                         AvatarUrl = avatarUrl
                     };
                     
-                    // Zapisz do localStorage
                     await _jsRuntime.InvokeVoidAsync("localStorage.setItem", "api_token", _apiToken);
                     await _jsRuntime.InvokeVoidAsync("localStorage.setItem", "user_info", JsonSerializer.Serialize(_userInfo));
                     
-                    // Ustaw header dla przyszłych requestów
                     _httpClient.DefaultRequestHeaders.Authorization = 
                         new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", _apiToken);