diff --git a/bukkit/compatibility/src/main/java/net/momirealms/craftengine/bukkit/compatibility/papi/CheckItemExpansion.java b/bukkit/compatibility/src/main/java/net/momirealms/craftengine/bukkit/compatibility/papi/CheckItemExpansion.java
new file mode 100644
index 000000000..e376c2f77
--- /dev/null
+++ b/bukkit/compatibility/src/main/java/net/momirealms/craftengine/bukkit/compatibility/papi/CheckItemExpansion.java
@@ -0,0 +1,125 @@
+package net.momirealms.craftengine.bukkit.compatibility.papi;
+
+import me.clip.placeholderapi.expansion.PlaceholderExpansion;
+import net.momirealms.craftengine.bukkit.item.BukkitItemManager;
+import net.momirealms.craftengine.bukkit.nms.FastNMS;
+import net.momirealms.craftengine.bukkit.plugin.BukkitCraftEngine;
+import net.momirealms.craftengine.bukkit.plugin.user.BukkitServerPlayer;
+import net.momirealms.craftengine.bukkit.util.ItemStackUtils;
+import net.momirealms.craftengine.core.entity.player.InteractionHand;
+import net.momirealms.craftengine.core.item.Item;
+import net.momirealms.craftengine.core.plugin.CraftEngine;
+import net.momirealms.craftengine.core.util.Key;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Locale;
+import java.util.function.Predicate;
+
+public class CheckItemExpansion extends PlaceholderExpansion {
+    private final CraftEngine plugin;
+
+    public CheckItemExpansion(CraftEngine plugin) {
+        this.plugin = plugin;
+    }
+
+    @NotNull
+    @Override
+    public String getIdentifier() {
+        return "checkceitem";
+    }
+
+    @NotNull
+    @Override
+    public String getAuthor() {
+        return "jhqwqmc";
+    }
+
+    @NotNull
+    @Override
+    public String getVersion() {
+        return "1.0";
+    }
+
+    @Override
+    public boolean persist() {
+        return true;
+    }
+
+    /**
+     * 用法:（小括号括起来的为必填，中括号括起来的为选填）
+     * </br>
+     * %checkceitem_count_(namespace):(path)%
+     * </br>
+     * %checkceitem_has_(namespace):(path):[amount]%
+     * </br>
+     * %checkceitem_id_[main_hand/off_hand/slot]%
+     * </br>
+     * %checkceitem_iscustom_[main_hand/off_hand/slot]%
+     */
+    @Override
+    public @Nullable String onPlaceholderRequest(Player bukkitPlayer, @NotNull String params) {
+        if (bukkitPlayer == null) return null;
+        BukkitServerPlayer player = BukkitCraftEngine.instance().adapt(bukkitPlayer);
+        if (player == null) return null;
+        int index = params.indexOf('_');
+        String action = index > 0 ? params.substring(0, index) : params;
+        String[] param = index > 0 ? params.substring(index + 1).split(":", 3) : new String[0];
+        return switch (action) {
+            case "count" -> param.length < 2 ? null : String.valueOf(getItemCount(player, param));
+            case "has" -> {
+                if (param.length < 2) yield null;
+                int requiredAmount;
+                try {
+                    requiredAmount = param.length < 3 ? 1 : Integer.parseInt(param[2]);
+                } catch (NumberFormatException e) {
+                    this.plugin.logger().warn("Invalid amount: " + param[2], e);
+                    yield null;
+                }
+                if (requiredAmount < 1) yield "true";
+                yield String.valueOf(getItemCount(player, param) >= requiredAmount);
+            }
+            case "id" -> {
+                Item<?> item = getItem(player, param);
+                if (item == null) yield null;
+                yield item.id().asString();
+            }
+            case "iscustom" -> {
+                Item<?> item = getItem(player, param);
+                if (item == null) yield null;
+                yield String.valueOf(item.isCustomItem());
+            }
+            default -> null;
+        };
+    }
+
+    @Nullable
+    private Item<?> getItem(BukkitServerPlayer player, String[] param) {
+        if (param.length < 1 || param[0] == null || param[0].isEmpty()) {
+            return player.getItemInHand(InteractionHand.MAIN_HAND);
+        }
+        return switch (param[0].toLowerCase(Locale.ROOT)) {
+            case "main_hand" -> player.getItemInHand(InteractionHand.MAIN_HAND);
+            case "off_hand" -> player.getItemInHand(InteractionHand.OFF_HAND);
+            default -> {
+                try {
+                    int slot = Integer.parseInt(param[0]);
+                    yield player.getItemBySlot(Math.max(slot, 0));
+                } catch (NumberFormatException | ArrayIndexOutOfBoundsException e) {
+                    this.plugin.logger().warn("Invalid slot: " + param[0], e);
+                    yield null;
+                }
+            }
+        };
+    }
+
+    private int getItemCount(BukkitServerPlayer player, String[] param) {
+        Key itemId = Key.of(param[0], param[1]);
+        Predicate<Object> predicate = nmsStack -> BukkitItemManager.instance().wrap(ItemStackUtils.asCraftMirror(nmsStack)).id().equals(itemId);
+        Object inventory = FastNMS.INSTANCE.method$Player$getInventory(player.serverPlayer());
+        Object inventoryMenu = FastNMS.INSTANCE.field$Player$inventoryMenu(player.serverPlayer());
+        Object craftSlots = FastNMS.INSTANCE.method$InventoryMenu$getCraftSlots(inventoryMenu);
+        return FastNMS.INSTANCE.method$Inventory$clearOrCountMatchingItems(inventory, predicate, 0, craftSlots);
+    }
+}
diff --git a/bukkit/compatibility/src/main/java/net/momirealms/craftengine/bukkit/compatibility/papi/PlaceholderAPIUtils.java b/bukkit/compatibility/src/main/java/net/momirealms/craftengine/bukkit/compatibility/papi/PlaceholderAPIUtils.java
index e96cb46dc..9f4dce361 100644
--- a/bukkit/compatibility/src/main/java/net/momirealms/craftengine/bukkit/compatibility/papi/PlaceholderAPIUtils.java
+++ b/bukkit/compatibility/src/main/java/net/momirealms/craftengine/bukkit/compatibility/papi/PlaceholderAPIUtils.java
@@ -20,5 +20,6 @@ public class PlaceholderAPIUtils {
     public static void registerExpansions(CraftEngine plugin) {
         new ImageExpansion(plugin).register();
         new ShiftExpansion(plugin).register();
+        new CheckItemExpansion(plugin).register();
     }
 }
diff --git a/bukkit/paper-loader/build.gradle.kts b/bukkit/paper-loader/build.gradle.kts
index 9adc91209..17432d821 100644
--- a/bukkit/paper-loader/build.gradle.kts
+++ b/bukkit/paper-loader/build.gradle.kts
@@ -6,7 +6,7 @@ import java.net.URI
 plugins {
     id("com.gradleup.shadow") version "9.2.2"
     id("de.eldoria.plugin-yml.paper") version "0.7.1"
-    id("xyz.jpenilla.run-paper") version "2.3.1"
+    id("xyz.jpenilla.run-paper") version "3.0.2"
 }
 
 repositories {
diff --git a/bukkit/src/main/java/net/momirealms/craftengine/bukkit/plugin/user/BukkitServerPlayer.java b/bukkit/src/main/java/net/momirealms/craftengine/bukkit/plugin/user/BukkitServerPlayer.java
index 3487d233f..af6789fab 100644
--- a/bukkit/src/main/java/net/momirealms/craftengine/bukkit/plugin/user/BukkitServerPlayer.java
+++ b/bukkit/src/main/java/net/momirealms/craftengine/bukkit/plugin/user/BukkitServerPlayer.java
@@ -946,6 +946,13 @@ public class BukkitServerPlayer extends Player {
         return BukkitItemManager.instance().wrap(hand == InteractionHand.MAIN_HAND ? inventory.getItemInMainHand() : inventory.getItemInOffHand());
     }
 
+    @NotNull
+    @Override
+    public Item<ItemStack> getItemBySlot(int slot) {
+        PlayerInventory inventory = platformPlayer().getInventory();
+        return BukkitItemManager.instance().wrap(inventory.getItem(slot));
+    }
+
     @Override
     public World world() {
         return new BukkitWorld(platformPlayer().getWorld());
diff --git a/core/src/main/java/net/momirealms/craftengine/core/entity/player/Player.java b/core/src/main/java/net/momirealms/craftengine/core/entity/player/Player.java
index 82ad30715..c8088ef4f 100644
--- a/core/src/main/java/net/momirealms/craftengine/core/entity/player/Player.java
+++ b/core/src/main/java/net/momirealms/craftengine/core/entity/player/Player.java
@@ -26,6 +26,9 @@ public abstract class Player extends AbstractEntity implements NetWorkUser {
     @NotNull
     public abstract Item<?> getItemInHand(InteractionHand hand);
 
+    @NotNull
+    public abstract Item<?> getItemBySlot(int slot);
+
     @Override
     public abstract Object platformPlayer();