diff --git a/paper-api/src/main/java/io/papermc/paper/block/LockableTileState.java b/paper-api/src/main/java/io/papermc/paper/block/LockableTileState.java
new file mode 100644
index 0000000000..f309961e0e
--- /dev/null
+++ b/paper-api/src/main/java/io/papermc/paper/block/LockableTileState.java
@@ -0,0 +1,11 @@
+package io.papermc.paper.block;
+
+import org.bukkit.Nameable;
+import org.bukkit.block.Lockable;
+import org.bukkit.block.TileState;
+
+/**
+ * Interface for tile entities that are lockable.
+ */
+public interface LockableTileState extends TileState, Lockable, Nameable {
+}
diff --git a/paper-api/src/main/java/io/papermc/paper/event/block/BlockLockCheckEvent.java b/paper-api/src/main/java/io/papermc/paper/event/block/BlockLockCheckEvent.java
new file mode 100644
index 0000000000..f08d390f0e
--- /dev/null
+++ b/paper-api/src/main/java/io/papermc/paper/event/block/BlockLockCheckEvent.java
@@ -0,0 +1,187 @@
+package io.papermc.paper.event.block;
+
+import com.google.common.base.Preconditions;
+import io.papermc.paper.block.LockableTileState;
+import java.util.Objects;
+import net.kyori.adventure.sound.Sound;
+import net.kyori.adventure.text.Component;
+import org.bukkit.block.Block;
+import org.bukkit.block.BlockState;
+import org.bukkit.entity.Player;
+import org.bukkit.event.HandlerList;
+import org.bukkit.event.block.BlockEvent;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.ApiStatus;
+import org.jspecify.annotations.NullMarked;
+import org.jspecify.annotations.Nullable;
+
+/**
+ * Called when the server tries to check the lock on a lockable block entity.
+ *
+ * See {@link #setResult(Result)} to change behavior
+ */
+@NullMarked
+public class BlockLockCheckEvent extends BlockEvent {
+
+ private static final HandlerList HANDLER_LIST = new HandlerList();
+
+ private final Player player;
+ private @Nullable Component lockedMessage;
+ private @Nullable Sound lockedSound;
+ private @Nullable ItemStack itemStack;
+ private Result result = Result.DEFAULT;
+
+ @ApiStatus.Internal
+ public BlockLockCheckEvent(final Block block, final Player player, final Component lockedMessage, final Sound lockedSound) {
+ super(block);
+ this.player = player;
+ this.lockedMessage = lockedMessage;
+ this.lockedSound = lockedSound;
+ }
+
+ /**
+ * Gets the snapshot {@link LockableTileState} of the block entity
+ * whose lock is being checked.
+ *
+ * @return the snapshot block state.
+ */
+ public LockableTileState getBlockState() {
+ final BlockState blockState = this.getBlock().getState();
+ Preconditions.checkState(blockState instanceof LockableTileState, "Block state of lock-checked block is no longer a lockable tile state!");
+ return (LockableTileState) blockState;
+ }
+
+ /**
+ * Get the player involved this lock check.
+ *
+ * @return the player
+ */
+ public Player getPlayer() {
+ return this.player;
+ }
+
+ /**
+ * Gets the itemstack that will be used as the key itemstack. Initially
+ * this will be the item in the player's main hand but an override can be set
+ * with {@link #setKeyItem(ItemStack)}. Use {@link #isUsingCustomKeyItemStack()}
+ * to check if a custom key stack has been set.
+ *
+ * @return the item being used as the key item
+ * @see #isUsingCustomKeyItemStack()
+ */
+ public ItemStack getKeyItem() {
+ return Objects.requireNonNullElseGet(this.itemStack, this.player.getInventory()::getItemInMainHand);
+ }
+
+ /**
+ * Sets the itemstack that will be used as the key item.
+ *
+ * @param stack the stack to use as a key
+ * @see #resetKeyItem() to clear a custom key item
+ */
+ public void setKeyItem(final ItemStack stack) {
+ Preconditions.checkArgument(stack != null, "stack cannot be null");
+ this.itemStack = stack;
+ }
+
+ /**
+ * Reset the key stack to the default (the player's main hand).
+ */
+ public void resetKeyItem() {
+ this.itemStack = null;
+ }
+
+ /**
+ * Checks if a custom key stack has been set.
+ *
+ * @return {@code true} if a custom key itemstack has been set
+ */
+ public boolean isUsingCustomKeyItemStack() {
+ return this.itemStack != null;
+ }
+
+ /**
+ * Gets the result of this event.
+ *
+ * @return the result
+ * @see #setResult(Result)
+ */
+ public Result getResult() {
+ return this.result;
+ }
+
+ /**
+ * Gets the result of this event. {@link Result#DEFAULT} is the default
+ * allowing the vanilla logic to check the lock of this block. Set to {@link Result#ALLOW}
+ * or {@link Result#DENY} to override that behavior.
+ *
+ * Setting this to {@link Result#ALLOW} bypasses the spectator check.
+ *
+ * @param result the result of this event
+ */
+ public void setResult(final Result result) {
+ this.result = result;
+ }
+
+ /**
+ * Shorthand method to set the {@link #getResult()} to {@link Result#DENY},
+ * the locked message and locked sound.
+ *
+ * @param lockedMessage the message to show if locked (or {@code null} for none)
+ * @param lockedSound the sound to play if locked (or {@code null} for none)
+ */
+ public void denyWithMessageAndSound(final @Nullable Component lockedMessage, final @Nullable Sound lockedSound) {
+ this.result = Result.DENY;
+ this.lockedMessage = lockedMessage;
+ this.lockedSound = lockedSound;
+ }
+
+ /**
+ * Gets the locked message that will be sent if the
+ * player cannot open the block.
+ *
+ * @return the locked message (or {@code null} if none)
+ */
+ public @Nullable Component getLockedMessage() {
+ return this.lockedMessage;
+ }
+
+ /**
+ * Sets the locked message that will be sent if the
+ * player cannot open the block.
+ *
+ * @param lockedMessage the locked message (or {@code null} for none)
+ */
+ public void setLockedMessage(final @Nullable Component lockedMessage) {
+ this.lockedMessage = lockedMessage;
+ }
+
+ /**
+ * Gets the locked sound that will play if the
+ * player cannot open the block.
+ *
+ * @return the locked sound (or {@code null} if none)
+ */
+ public @Nullable Sound getLockedSound() {
+ return this.lockedSound;
+ }
+
+ /**
+ * Sets the locked sound that will play if the
+ * player cannot open the block.
+ *
+ * @param lockedSound the locked sound (or {@code null} for none)
+ */
+ public void setLockedSound(final @Nullable Sound lockedSound) {
+ this.lockedSound = lockedSound;
+ }
+
+ @Override
+ public HandlerList getHandlers() {
+ return HANDLER_LIST;
+ }
+
+ public static HandlerList getHandlerList() {
+ return HANDLER_LIST;
+ }
+}
diff --git a/paper-api/src/main/java/org/bukkit/block/Beacon.java b/paper-api/src/main/java/org/bukkit/block/Beacon.java
index 7d212c4090..79c04b840a 100644
--- a/paper-api/src/main/java/org/bukkit/block/Beacon.java
+++ b/paper-api/src/main/java/org/bukkit/block/Beacon.java
@@ -11,7 +11,7 @@ import org.jetbrains.annotations.Nullable;
/**
* Represents a captured state of a beacon.
*/
-public interface Beacon extends TileState, Lockable, Nameable {
+public interface Beacon extends io.papermc.paper.block.LockableTileState { // Paper
/**
* Returns the list of players within the beacon's range of effect.
diff --git a/paper-api/src/main/java/org/bukkit/block/Container.java b/paper-api/src/main/java/org/bukkit/block/Container.java
index bc06199f0a..a67ee0cb0c 100644
--- a/paper-api/src/main/java/org/bukkit/block/Container.java
+++ b/paper-api/src/main/java/org/bukkit/block/Container.java
@@ -8,7 +8,7 @@ import org.jetbrains.annotations.NotNull;
/**
* Represents a captured state of a container block.
*/
-public interface Container extends TileState, BlockInventoryHolder, Lockable, Nameable {
+public interface Container extends io.papermc.paper.block.LockableTileState, BlockInventoryHolder { // Paper
/**
* Gets the inventory of the block represented by this block state.