diff --git a/receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.csproj b/receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.csproj
index 29b3a48a..0fc039e1 100644
--- a/receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.csproj
+++ b/receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web.csproj
@@ -19,6 +19,7 @@
     <PackageReference Include="Microsoft.Extensions.AI.OpenAI" Version="9.7.1-preview.1.25365.4" />
     
     <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.Server" Version="8.0.20" />
+    <PackageReference Include="Yarp.ReverseProxy" Version="2.2.0" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web/Program.cs b/receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web/Program.cs
index a944b892..23099f15 100644
--- a/receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web/Program.cs
+++ b/receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web/Program.cs
@@ -1,7 +1,10 @@
-using EnvelopeGenerator.ReceiverUI.Web.Client.Utils;
+using EnvelopeGenerator.ReceiverUI.Web.Client.Api;
+using EnvelopeGenerator.ReceiverUI.Web.Client.Services;
+using EnvelopeGenerator.ReceiverUI.Web.Client.Utils;
 using EnvelopeGenerator.ReceiverUI.Web.Components;
 using System.Text;
 
+
 var builder = WebApplication.CreateBuilder(args);
 
 // Add services to the container.
@@ -27,6 +30,26 @@ builder.Services.AddMvc();
 
 builder.Services.AddDevExpressServerSideBlazorPdfViewer();
 
+// ── Receiver API + Auth + Localization (for prerender on the server) ─
+// During prerendering the components still need the same scoped services
+// as on the WASM side. Server-side calls go directly to the API
+// (configured via "Api:BaseUrl"); browser-side calls go through YARP.
+// Note: server-side prerender does NOT forward the user's auth cookie yet
+// (will be added in a later phase if interactive prerender is needed).
+var apiBaseUrl = builder.Configuration["Api:BaseUrl"]
+    ?? throw new InvalidOperationException("Api:BaseUrl is missing from configuration.");
+builder.Services.AddHttpClient<ReceiverApiClient>(client =>
+{
+    client.BaseAddress = new Uri(apiBaseUrl.TrimEnd('/') + "/");
+});
+builder.Services.AddScoped<LocalizationService>();
+builder.Services.AddScoped<ReceiverAuthState>();
+
+// ── YARP reverse proxy: forwards /api/** from the browser to the API
+// (same-origin from the browser's POV → HttpOnly auth cookie flows).
+builder.Services.AddReverseProxy()
+    .LoadFromConfig(builder.Configuration.GetSection("ReverseProxy"));
+
 var app = builder.Build();
 
 // Configure the HTTP request pipeline.
@@ -69,6 +92,10 @@ app.UseHttpsRedirection();
 app.UseStaticFiles();
 app.UseAntiforgery();
 
+// Forward all /api/** traffic (except /api/chat which is handled above)
+// to the EnvelopeGenerator.API backend.
+app.MapReverseProxy();
+
 app.MapRazorComponents<App>()
     .AddInteractiveServerRenderMode()
     .AddInteractiveWebAssemblyRenderMode()
@@ -76,3 +103,4 @@ app.MapRazorComponents<App>()
     .AllowAnonymous();
 
 app.Run();
+
diff --git a/receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web/appsettings.json b/receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web/appsettings.json
index 5473a435..ca50199e 100644
--- a/receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web/appsettings.json
+++ b/receiverUI/EnvelopeGenerator.ReceiverUI.Web/EnvelopeGenerator.ReceiverUI.Web/appsettings.json
@@ -4,6 +4,28 @@
     "Key": "DEMO",
     "DeploymentName": "gpt-4.1"
   },
+  "Api": {
+    "BaseUrl": "https://localhost:8088"
+  },
+  "ReverseProxy": {
+    "Routes": {
+      "envelope-api": {
+        "ClusterId": "envelope-api",
+        "Match": {
+          "Path": "/api/{**catch-all}"
+        }
+      }
+    },
+    "Clusters": {
+      "envelope-api": {
+        "Destinations": {
+          "default": {
+            "Address": "https://localhost:8088"
+          }
+        }
+      }
+    }
+  },
   "Logging": {
     "LogLevel": {
       "Default": "Information",