diff --git a/src/dotnet/QuantEngine.Web/Program.cs b/src/dotnet/QuantEngine.Web/Program.cs
index 63ceb94..5650161 100644
--- a/src/dotnet/QuantEngine.Web/Program.cs
+++ b/src/dotnet/QuantEngine.Web/Program.cs
@@ -37,10 +37,10 @@ builder.Services.AddScoped<IPostgresqlHistoryStore, PostgresqlHistoryStore>();
 builder.Services.AddScoped<IPostgresqlHistorySnapshotReader, PostgresqlHistorySnapshotReader>();
 builder.Services.AddScoped<HistoryIngestionService>();
 
-// Collection Pipeline Services
-builder.Services.AddScoped<ICollectionRepository, CollectionRepository>();
-builder.Services.AddScoped<ITokenCache, PostgresTokenCache>();
-builder.Services.AddScoped<IKisApiClient, KisApiClient>();
+// Collection Pipeline Services (using placeholder implementations for now)
+builder.Services.AddScoped<ICollectionRepository, PlaceholderCollectionRepository>();
+builder.Services.AddScoped<ITokenCache, PlaceholderTokenCache>();
+builder.Services.AddScoped<IKisApiClient, PlaceholderKisApiClient>();
 
 // HTTP Client & API Services
 builder.Services.AddHttpClient<ApiClient>();
@@ -57,7 +57,13 @@ if (!app.Environment.IsDevelopment())
     app.UseExceptionHandler("/Error", createScopeForErrors: true);
     app.UseHsts();
 }
-app.UseStatusCodePagesWithReExecute("/not-found", createScopeForStatusCodePages: true);
+// Redirect status code pages only for non-API routes
+app.UseStatusCodePages(async ctx =>
+{
+    if (!ctx.HttpContext.Request.Path.StartsWithSegments("/api"))
+        ctx.HttpContext.Response.Redirect("/not-found");
+});
+
 app.UseHttpsRedirection();
 
 app.UseAntiforgery();