diff --git a/src/Prospect.Server.Api/Services/CloudScript/Functions/CompleteInventoryUpdate.cs b/src/Prospect.Server.Api/Services/CloudScript/Functions/CompleteInventoryUpdate.cs
new file mode 100644
index 0000000..d8bb2f4
--- /dev/null
+++ b/src/Prospect.Server.Api/Services/CloudScript/Functions/CompleteInventoryUpdate.cs
@@ -0,0 +1,114 @@
+using System.Text.Json;
+using System.Text.Json.Serialization;
+using Prospect.Server.Api.Services.Auth.Extensions;
+using Prospect.Server.Api.Services.CloudScript;
+using Prospect.Server.Api.Services.CloudScript.Models;
+using Prospect.Server.Api.Services.UserData;
+
+// Closed Beta Function
+
+public class CompleteInventoryUpdateRequest
+{
+    [JsonPropertyName("userId")]
+    public string UserID { get; set; }
+    [JsonPropertyName("reason")]
+    public string Reason { get; set; }
+    [JsonPropertyName("newSet")]
+    public LoadoutData NewSet { get; set; }
+    [JsonPropertyName("itemsToAdd")]
+    public FYCustomItemInfo[] ItemsToAdd { get; set; }
+    [JsonPropertyName("itemsToUpdateAmount")]
+    public FYCustomItemInfo[] ItemsToUpdateAmount { get; set; }
+    [JsonPropertyName("itemsToRemove")]
+    public HashSet<string> ItemsToRemove { get; set; }
+}
+
+public class CompleteInventoryUpdateResponse
+{
+    [JsonPropertyName("userId")]
+    public string UserId { get; set; }
+    [JsonPropertyName("error")]
+    public string Error { get; set; }
+    [JsonPropertyName("newSet")]
+    public LoadoutData NewSet { get; set; }
+    [JsonPropertyName("itemsToAdd")]
+    public FYCustomItemInfo[] ItemsToAdd { get; set; }
+    [JsonPropertyName("itemsToUpdateAmount")]
+    public FYCustomItemInfo[] ItemsToUpdateAmount { get; set; }
+    [JsonPropertyName("itemsToRemove")]
+    public HashSet<string> ItemsToRemove { get; set; }
+}
+
+[CloudScriptFunction("CompleteInventoryUpdate")]
+public class CompleteInventoryUpdateFunction : ICloudScriptFunction<CompleteInventoryUpdateRequest, CompleteInventoryUpdateResponse>
+{
+    private readonly ILogger<CompleteInventoryUpdateFunction> _logger;
+    private readonly IHttpContextAccessor _httpContextAccessor;
+    private readonly UserDataService _userDataService;
+
+    public CompleteInventoryUpdateFunction(ILogger<CompleteInventoryUpdateFunction> logger, IHttpContextAccessor httpContextAccessor, UserDataService userDataService)
+    {
+        _logger = logger;
+        _httpContextAccessor = httpContextAccessor;
+        _userDataService = userDataService;
+    }
+
+    public async Task<CompleteInventoryUpdateResponse> ExecuteAsync(CompleteInventoryUpdateRequest request)
+    {
+        var context = _httpContextAccessor.HttpContext;
+        if (context == null)
+        {
+            throw new CloudScriptException("CloudScript was not called within a http request");
+        }
+        var userId = context.User.FindAuthUserId();
+        var userData = await _userDataService.FindAsync(userId, userId, new List<string>{"Inventory"});
+        var inventory = JsonSerializer.Deserialize<List<FYCustomItemInfo>>(userData["Inventory"].Value);
+
+        // TODO: Optimize
+        // TODO: Check deleted items to see if other stacks/mods were updated correctly
+        // Process inventory update. The player may:
+        // 1. Split item stack - creates a new item and updates amount of existing item.
+        // 2. Stack existing items - deletes existing items and updates amount of existing item.
+        // 3. Change vanity data - updates an existing item.
+        // 4. Change weapon mods - updates an existing item.
+        // IMPORTANT: The same request is currently used to report the updated inventory in the end of match.
+        var newInventory = new List<FYCustomItemInfo>(inventory.Count);
+        foreach (var item in inventory) {
+            if (!request.ItemsToRemove.Contains(item.ItemId)) {
+                newInventory.Add(item);
+            }
+        }
+
+        foreach (var item in request.ItemsToUpdateAmount) {
+            var inventoryItem = newInventory.Find(i => i.ItemId == item.ItemId);
+            if (inventoryItem == null) {
+                continue;
+            }
+            inventoryItem.Amount = item.Amount;
+            inventoryItem.ModData = item.ModData;
+            inventoryItem.PrimaryVanityId = item.PrimaryVanityId;
+            inventoryItem.SecondaryVanityId = item.SecondaryVanityId;
+            inventoryItem.Durability = item.Durability;
+        }
+
+        // TODO: Check updated items and validate new items
+        foreach (var item in request.ItemsToAdd) {
+            newInventory.Add(item);
+        }
+
+        await _userDataService.UpdateAsync(userId, userId, new Dictionary<string, string>{
+            ["LOADOUT"] = JsonSerializer.Serialize(request.NewSet),
+            ["Inventory"] = JsonSerializer.Serialize(newInventory),
+        });
+
+        return new CompleteInventoryUpdateResponse
+        {
+            UserId = userId,
+            //Error = "",
+            //NewSet = request.NewSet,
+            //ItemsToAdd = request.ItemsToAdd,
+            //ItemsToRemove = request.ItemsToRemove,
+            //ItemsToUpdateAmount = request.ItemsToUpdateAmount,
+        };
+    }
+}