diff --git a/Libraries/SPTarkov.Server.Core/Callbacks/ModdedTraderCustomizationCallbacks.cs b/Libraries/SPTarkov.Server.Core/Callbacks/ModdedTraderCustomizationCallbacks.cs
new file mode 100644
index 00000000..682c2cb0
--- /dev/null
+++ b/Libraries/SPTarkov.Server.Core/Callbacks/ModdedTraderCustomizationCallbacks.cs
@@ -0,0 +1,23 @@
+using SPTarkov.DI.Annotations;
+using SPTarkov.Server.Core.Controllers;
+using SPTarkov.Server.Core.Models.Common;
+using SPTarkov.Server.Core.Models.Eft.Common;
+using SPTarkov.Server.Core.Utils;
+
+namespace SPTarkov.Server.Core.Callbacks;
+
+[Injectable]
+public class ModdedTraderCustomizationCallbacks(
+    ModdedTraderCustomizationController moddedTraderCustomizationController,
+    HttpResponseUtil httpResponseUtil
+)
+{
+    /// <summary>
+    ///     Handle /singleplayer/moddedTraders
+    /// </summary>
+    /// <returns></returns>
+    public ValueTask<string> GetCustomizationTraders(string url, EmptyRequestData _, MongoId sessionID)
+    {
+        return new ValueTask<string>(httpResponseUtil.NoBody(moddedTraderCustomizationController.GetCustomizationSellerIds()));
+    }
+}
diff --git a/Libraries/SPTarkov.Server.Core/Controllers/ModdedTraderCustomizationController.cs b/Libraries/SPTarkov.Server.Core/Controllers/ModdedTraderCustomizationController.cs
new file mode 100644
index 00000000..66d97808
--- /dev/null
+++ b/Libraries/SPTarkov.Server.Core/Controllers/ModdedTraderCustomizationController.cs
@@ -0,0 +1,28 @@
+using SPTarkov.DI.Annotations;
+using SPTarkov.Server.Core.Models.Enums;
+using SPTarkov.Server.Core.Models.Spt.Mod;
+using SPTarkov.Server.Core.Services;
+
+namespace SPTarkov.Server.Core.Controllers;
+
+[Injectable]
+public class ModdedTraderCustomizationController(DatabaseService databaseService)
+{
+    public ModdedTraderListResponse GetCustomizationSellerIds()
+    {
+        var traders = databaseService.GetTraders();
+        var customizationSellers = new ModdedTraderListResponse
+        {
+            ModdedTraders = []
+        };
+
+        foreach (var trader in traders)
+        {
+            if (trader.Value.Base.CustomizationSeller!.Value && trader.Key != Traders.RAGMAN)
+            {
+                customizationSellers.ModdedTraders.Add(trader.Key);
+            }
+        }
+        return customizationSellers;
+    }
+}
diff --git a/Libraries/SPTarkov.Server.Core/Models/Spt/Mod/ModdedTraderListResponse.cs b/Libraries/SPTarkov.Server.Core/Models/Spt/Mod/ModdedTraderListResponse.cs
new file mode 100644
index 00000000..0c3dbc6d
--- /dev/null
+++ b/Libraries/SPTarkov.Server.Core/Models/Spt/Mod/ModdedTraderListResponse.cs
@@ -0,0 +1,6 @@
+namespace SPTarkov.Server.Core.Models.Spt.Mod;
+
+public record ModdedTraderListResponse
+{
+    public List<string>? ModdedTraders { get; set; }
+}
diff --git a/Libraries/SPTarkov.Server.Core/Routers/Static/ModdedTraderCustomizationRouter.cs b/Libraries/SPTarkov.Server.Core/Routers/Static/ModdedTraderCustomizationRouter.cs
new file mode 100644
index 00000000..7d47ea68
--- /dev/null
+++ b/Libraries/SPTarkov.Server.Core/Routers/Static/ModdedTraderCustomizationRouter.cs
@@ -0,0 +1,20 @@
+using SPTarkov.DI.Annotations;
+using SPTarkov.Server.Core.Callbacks;
+using SPTarkov.Server.Core.DI;
+using SPTarkov.Server.Core.Models.Eft.Common;
+using SPTarkov.Server.Core.Utils;
+
+namespace SPTarkov.Server.Core.Routers.Static;
+
+[Injectable]
+public class ModdedTraderCustomizationRouter(JsonUtil jsonUtil, ModdedTraderCustomizationCallbacks moddedTraderCustomizationCallbacks)
+    : StaticRouter(
+        jsonUtil,
+        [
+            new RouteAction<EmptyRequestData>(
+                "/singleplayer/moddedTraders",
+                async (url, info, sessionID, output) =>
+                    await moddedTraderCustomizationCallbacks.GetCustomizationTraders(url, info, sessionID)
+            )
+        ]
+    ) { }