diff --git a/protocol/src/main/java/mc/protocol/State.java b/protocol/src/main/java/mc/protocol/State.java
index 70cfb0f..924bbcc 100644
--- a/protocol/src/main/java/mc/protocol/State.java
+++ b/protocol/src/main/java/mc/protocol/State.java
@@ -55,6 +55,7 @@ public enum State {
 			),
 			// client bound
 			Map.of(
+					OpenWindowPacket.class, 0x13,
 					PingPacket.class, 0x1F,
 					ChunkDataPacket.class, 0x20,
 					JoinGamePacket.class, 0x23,
diff --git a/protocol/src/main/java/mc/protocol/packets/server/OpenWindowPacket.java b/protocol/src/main/java/mc/protocol/packets/server/OpenWindowPacket.java
new file mode 100644
index 0000000..f05c059
--- /dev/null
+++ b/protocol/src/main/java/mc/protocol/packets/server/OpenWindowPacket.java
@@ -0,0 +1,43 @@
+package mc.protocol.packets.server;
+
+import lombok.Data;
+import mc.protocol.io.NetByteBuf;
+import mc.protocol.model.text.Text;
+import mc.protocol.packets.ServerSidePacket;
+import mc.protocol.serializer.TextSerializer;
+
+/**
+ * Open Window packet.
+ *
+ * <p>Структура пакета</p>
+ * <pre>
+ * | FIELD           | TYPE          | NOTES                                                        |
+ * |-----------------|---------------|--------------------------------------------------------------|
+ * | Window ID       | Unsigned Byte | Уникальный ID окна                                           |
+ * | Window Type     | String (32)   | Тип окна. [1]                                                |
+ * | Window Title    | Text          | Заголовок окна                                               |
+ * | Number Of Slots | Unsigned Byte | Количество слотов в окне (без учета слотов инвенторя игрока) |
+ * |                 |               | Всегда 0 для окон без хранения (например Anvil)              |
+ *
+ * [1] - <a href="https://wiki.vg/index.php?title=Inventory&oldid=14093">Inventory</a>
+ * </pre>
+ *
+ * @see <a href="https://wiki.vg/index.php?title=Protocol&oldid=14204#Open_Window">Open Window</a>
+ * @see <a href="https://wiki.vg/index.php?title=Inventory&oldid=14093">Inventory</a>
+ */
+@Data
+public class OpenWindowPacket implements ServerSidePacket {
+
+	private int windowId;
+	private String windowType;
+	private Text windowTitle;
+	private int numberOfSlots;
+
+	@Override
+	public void writeSelf(NetByteBuf netByteBuf) {
+		netByteBuf.writeUnsignedByte(this.windowId);
+		netByteBuf.writeString(this.windowType);
+		netByteBuf.writeString(TextSerializer.toJsonObject(this.windowTitle).toString());
+		netByteBuf.writeUnsignedByte(this.numberOfSlots);
+	}
+}
diff --git a/server/src/main/java/mc/server/PacketHandler.java b/server/src/main/java/mc/server/PacketHandler.java
index fad97df..e6344fd 100644
--- a/server/src/main/java/mc/server/PacketHandler.java
+++ b/server/src/main/java/mc/server/PacketHandler.java
@@ -7,6 +7,7 @@ import mc.protocol.api.ConnectionContext;
 import mc.protocol.model.Location;
 import mc.protocol.model.Look;
 import mc.protocol.model.ServerInfo;
+import mc.protocol.model.text.Text;
 import mc.protocol.packets.PingPacket;
 import mc.protocol.packets.client.HandshakePacket;
 import mc.protocol.packets.client.LoginStartPacket;
@@ -122,6 +123,16 @@ public class PacketHandler {
 		context.send(pingPacket);
 
 		context.flushSending();
+
+		// -- Эксперименты -- //
+
+		var openWindowPacket = new OpenWindowPacket();
+		openWindowPacket.setWindowId(random.nextInt());
+		openWindowPacket.setWindowType("minecraft:chest");
+		openWindowPacket.setWindowTitle(Text.of("Some Title"));
+		openWindowPacket.setNumberOfSlots(9);
+
+		context.sendNow(openWindowPacket);
 	}
 
 	private static String faviconToBase64(Path iconPath) {