diff --git a/Lib9c.GraphQL/Types/Items/InventoryItemType.cs b/Lib9c.GraphQL/Types/Items/InventoryItemType.cs
new file mode 100644
index 00000000..032f4d9a
--- /dev/null
+++ b/Lib9c.GraphQL/Types/Items/InventoryItemType.cs
@@ -0,0 +1,12 @@
+using HotChocolate.Types;
+using Lib9c.Models.Items;
+
+namespace Lib9c.GraphQL.Types.Items;
+
+public class InventoryItemType : ObjectType<InventoryItem>
+{
+    protected override void Configure(IObjectTypeDescriptor<InventoryItem> descriptor)
+    {
+        descriptor.Ignore(f => f.Lock);
+    }
+}
diff --git a/Mimir.MongoDB/Repositories/InventoryRepository.cs b/Mimir.MongoDB/Repositories/InventoryRepository.cs
index c10c0066..f983dff3 100644
--- a/Mimir.MongoDB/Repositories/InventoryRepository.cs
+++ b/Mimir.MongoDB/Repositories/InventoryRepository.cs
@@ -8,17 +8,17 @@ namespace Mimir.MongoDB.Repositories;
 
 public class InventoryRepository(MongoDbService dbService)
 {
-    public async Task<InventoryDocument> GetByAddressAsync(Address avatarAddress)
+    public async Task<InventoryDocument> GetByAddressAsync(Address address)
     {
         var collectionName = CollectionNames.GetCollectionName<InventoryDocument>();
         var collection = dbService.GetCollection<InventoryDocument>(collectionName);
-        var filter = Builders<InventoryDocument>.Filter.Eq("Address", avatarAddress.ToHex());
+        var filter = Builders<InventoryDocument>.Filter.Eq("Address", address.ToHex());
         var document = await collection.Find(filter).FirstOrDefaultAsync();
         if (document is null)
         {
             throw new DocumentNotFoundInMongoCollectionException(
                 collection.CollectionNamespace.CollectionName,
-                $"'Address' equals to '{avatarAddress.ToHex()}'");
+                $"'Address' equals to '{address.ToHex()}'");
         }
 
         return document;
diff --git a/Mimir/GraphQL/Queries/Query.cs b/Mimir/GraphQL/Queries/Query.cs
index f0efa245..6d388890 100644
--- a/Mimir/GraphQL/Queries/Query.cs
+++ b/Mimir/GraphQL/Queries/Query.cs
@@ -1,6 +1,7 @@
 using HotChocolate.AspNetCore;
 using Lib9c.GraphQL.Extensions;
 using Lib9c.GraphQL.InputObjects;
+using Lib9c.Models.Items;
 using Lib9c.Models.Market;
 using Lib9c.Models.States;
 using Libplanet.Crypto;
@@ -100,6 +101,14 @@ public async Task<Dictionary<int, CombinationSlotState>> GetCombinationSlotsAsyn
     public async Task<long> GetDailyRewardReceivedBlockIndexAsync(Address address, [Service] DailyRewardRepository repo)
         => (await repo.GetByAddressAsync(address)).Object;
 
+    /// <summary>
+    /// Get the inventory state by avatar address.
+    /// </summary>
+    /// <param name="address">The address of the avatar.</param>
+    /// <returns>The inventory state for the specified avatar address.</returns>
+    public async Task<Inventory> GetInventoryAsync(Address address, [Service] InventoryRepository repo) =>
+        (await repo.GetByAddressAsync(address)).Object;
+
     /// <summary>
     /// Get metadata by collection name.
     /// </summary>
diff --git a/Mimir/Program.cs b/Mimir/Program.cs
index e930e9b1..cc5dce38 100644
--- a/Mimir/Program.cs
+++ b/Mimir/Program.cs
@@ -44,7 +44,7 @@
 builder.Services.AddSingleton<BalanceRepository>();
 builder.Services.AddSingleton<CollectionRepository>();
 builder.Services.AddSingleton<DailyRewardRepository>();
-// builder.Services.AddSingleton<InventoryRepository>();
+builder.Services.AddSingleton<InventoryRepository>();
 builder.Services.AddSingleton<ItemSlotRepository>();
 builder.Services.AddSingleton<MetadataRepository>();
 builder.Services.AddSingleton<PetRepository>();