diff --git a/SVSim.EmulatedEntrypoint/Controllers/ItemPurchaseController.cs b/SVSim.EmulatedEntrypoint/Controllers/ItemPurchaseController.cs
index 7bd08a8..3510c5c 100644
--- a/SVSim.EmulatedEntrypoint/Controllers/ItemPurchaseController.cs
+++ b/SVSim.EmulatedEntrypoint/Controllers/ItemPurchaseController.cs
@@ -5,6 +5,7 @@ using SVSim.Database.Enums;
 using SVSim.Database.Models;
 using SVSim.Database.Services;
 using SVSim.EmulatedEntrypoint.Models.Dtos;
+using SVSim.EmulatedEntrypoint.Models.Dtos.Requests;
 using SVSim.EmulatedEntrypoint.Models.Dtos.Requests.ItemPurchase;
 using SVSim.EmulatedEntrypoint.Models.Dtos.Responses.ItemPurchase;
 using SVSim.EmulatedEntrypoint.Services;
@@ -31,7 +32,7 @@ public class ItemPurchaseController : SVSimController
     }
 
     [HttpPost("info")]
-    public async Task<ActionResult<ItemPurchaseInfoResponse>> Info()
+    public async Task<ActionResult<ItemPurchaseInfoResponse>> Info(BaseRequest _)
     {
         if (!TryGetViewerId(out long viewerId)) return Unauthorized();
 
diff --git a/SVSim.EmulatedEntrypoint/Controllers/LeaderSkinController.cs b/SVSim.EmulatedEntrypoint/Controllers/LeaderSkinController.cs
index 927db7f..a85850a 100644
--- a/SVSim.EmulatedEntrypoint/Controllers/LeaderSkinController.cs
+++ b/SVSim.EmulatedEntrypoint/Controllers/LeaderSkinController.cs
@@ -5,6 +5,7 @@ using SVSim.Database.Enums;
 using SVSim.Database.Models;
 using SVSim.Database.Services;
 using SVSim.EmulatedEntrypoint.Models.Dtos;
+using SVSim.EmulatedEntrypoint.Models.Dtos.Requests;
 using SVSim.EmulatedEntrypoint.Models.Dtos.Requests.LeaderSkin;
 using SVSim.EmulatedEntrypoint.Models.Dtos.Responses.LeaderSkin;
 
@@ -76,7 +77,7 @@ public class LeaderSkinController : SVSimController
     }
 
     [HttpPost("ids")]
-    public async Task<ActionResult<LeaderSkinIdsResponse>> Ids()
+    public async Task<ActionResult<LeaderSkinIdsResponse>> Ids(BaseRequest _)
     {
         if (!TryGetViewerId(out long viewerId)) return Unauthorized();
 
@@ -90,7 +91,7 @@ public class LeaderSkinController : SVSimController
     }
 
     [HttpPost("products")]
-    public async Task<ActionResult<Dictionary<string, SkinSeriesDto>>> Products()
+    public async Task<ActionResult<Dictionary<string, SkinSeriesDto>>> Products(BaseRequest _)
     {
         if (!TryGetViewerId(out long viewerId)) return Unauthorized();
 
@@ -262,15 +263,24 @@ public class LeaderSkinController : SVSimController
 
     /// <summary>
     /// Computes the per-viewer <c>rewards.status</c> for a series:
-    ///   0=none — set_sales_status==0 (no set sale active)
-    ///   1=not_got — series completed by viewer but bonus unclaimed
+    ///   0=none — set_sales_status==0 OR no bonus items configured (matches prod, which ships
+    ///   status=0 for series where items[] is empty even when set_sales_status==1)
+    ///   1=not_got — bonus exists, series completed by viewer, bonus unclaimed
     ///   2=got — viewer claimed the bonus
-    ///   1 (effectively "available later") when set sale active but viewer hasn't completed it.
+    ///   1 (effectively "available later") when set sale active with bonus and viewer hasn't
+    ///   completed the series.
     /// The 1/2 distinction matches the client enum (RewardStatus.not_got vs .got).
+    /// <para>
+    /// Important: emitting status=1 when items[] is empty triggers the client's
+    /// <c>is_completed &amp;&amp; not_got</c> branch in SkinPurchaseInfoTask.CreateSetSaleInfo,
+    /// which marks the set sale as FREE and renders a useless "claim" button for a
+    /// nonexistent bonus. Always return 0 when there's nothing to claim.
+    /// </para>
     /// </summary>
     private static int ComputeRewardStatus(LeaderSkinShopSeriesEntry series, bool seriesCompleted, bool claimed)
     {
         if (series.SetSalesStatus == 0) return 0;
+        if (series.SetCompletionRewards.Count == 0) return 0;
         if (claimed) return 2;
         if (seriesCompleted) return 1;
         return 1;
diff --git a/SVSim.EmulatedEntrypoint/Controllers/SleeveController.cs b/SVSim.EmulatedEntrypoint/Controllers/SleeveController.cs
index 0da5b50..c9d623e 100644
--- a/SVSim.EmulatedEntrypoint/Controllers/SleeveController.cs
+++ b/SVSim.EmulatedEntrypoint/Controllers/SleeveController.cs
@@ -5,6 +5,7 @@ using SVSim.Database.Enums;
 using SVSim.Database.Models;
 using SVSim.Database.Services;
 using SVSim.EmulatedEntrypoint.Models.Dtos;
+using SVSim.EmulatedEntrypoint.Models.Dtos.Requests;
 using SVSim.EmulatedEntrypoint.Models.Dtos.Requests.Sleeve;
 using SVSim.EmulatedEntrypoint.Models.Dtos.Responses.Sleeve;
 
@@ -27,7 +28,7 @@ public class SleeveController : SVSimController
     }
 
     [HttpPost("info")]
-    public async Task<ActionResult<SleeveInfoResponse>> Info()
+    public async Task<ActionResult<SleeveInfoResponse>> Info(BaseRequest _)
     {
         if (!TryGetViewerId(out long viewerId)) return Unauthorized();
 
diff --git a/SVSim.EmulatedEntrypoint/Controllers/SpotCardExchangeController.cs b/SVSim.EmulatedEntrypoint/Controllers/SpotCardExchangeController.cs
index ff85f78..584cbc7 100644
--- a/SVSim.EmulatedEntrypoint/Controllers/SpotCardExchangeController.cs
+++ b/SVSim.EmulatedEntrypoint/Controllers/SpotCardExchangeController.cs
@@ -5,6 +5,7 @@ using SVSim.Database.Enums;
 using SVSim.Database.Models;
 using SVSim.Database.Services;
 using SVSim.EmulatedEntrypoint.Models.Dtos;
+using SVSim.EmulatedEntrypoint.Models.Dtos.Requests;
 using SVSim.EmulatedEntrypoint.Models.Dtos.Requests.SpotCardExchange;
 using SVSim.EmulatedEntrypoint.Models.Dtos.Responses.SpotCardExchange;
 
@@ -38,7 +39,7 @@ public class SpotCardExchangeController : SVSimController
     }
 
     [HttpPost("top")]
-    public async Task<ActionResult<SpotCardExchangeTopResponse>> Top()
+    public async Task<ActionResult<SpotCardExchangeTopResponse>> Top(BaseRequest _)
     {
         if (!TryGetViewerId(out long viewerId)) return Unauthorized();
 
diff --git a/SVSim.EmulatedEntrypoint/Middlewares/ShadowverseTranslationMiddleware.cs b/SVSim.EmulatedEntrypoint/Middlewares/ShadowverseTranslationMiddleware.cs
index 2ffc0e6..b92cd4e 100644
--- a/SVSim.EmulatedEntrypoint/Middlewares/ShadowverseTranslationMiddleware.cs
+++ b/SVSim.EmulatedEntrypoint/Middlewares/ShadowverseTranslationMiddleware.cs
@@ -100,7 +100,19 @@ public class ShadowverseTranslationMiddleware : IMiddleware
             throw;
         }
 
-        Type requestType = endpointDescriptor.Parameters.FirstOrDefault().ParameterType;
+        var firstParam = endpointDescriptor.Parameters.FirstOrDefault();
+        if (firstParam is null)
+        {
+            // Action method has no parameters — middleware can't bind the (encrypted+msgpacked)
+            // body to anything. The codebase convention is to take a BaseRequest even for body-
+            // less endpoints (see e.g. PuzzleController.Info(BaseRequest _)). Fail loud with a
+            // specific message rather than NREing below on .ParameterType.
+            throw new InvalidOperationException(
+                $"Action {endpointDescriptor.DisplayName} has no parameters; the SV translation " +
+                "middleware needs at least one to bind the decrypted body. Add a BaseRequest parameter " +
+                "(or a derived DTO) — see other *Info/*Top actions for the convention.");
+        }
+        Type requestType = firstParam.ParameterType;
         object? data;
         try
         {