Entity Jump API

paper-api/src/main/java/com/destroystokyo/paper/event/entity/EntityJumpEvent.java

@@ -0,0 +1,50 @@
+package com.destroystokyo.paper.event.entity;
+
+import org.bukkit.entity.LivingEntity;
+import org.bukkit.event.Cancellable;
+import org.bukkit.event.HandlerList;
+import org.bukkit.event.entity.EntityEvent;
+import org.jetbrains.annotations.ApiStatus;
+import org.jspecify.annotations.NullMarked;
+
+/**
+ * Called when an entity jumps
+ * <p>
+ * Cancelling the event will stop the entity from jumping
+ */
+@NullMarked
+public class EntityJumpEvent extends EntityEvent implements Cancellable {
+
+    private static final HandlerList HANDLER_LIST = new HandlerList();
+
+    private boolean cancelled;
+
+    @ApiStatus.Internal
+    public EntityJumpEvent(final LivingEntity entity) {
+        super(entity);
+    }
+
+    @Override
+    public LivingEntity getEntity() {
+        return (LivingEntity) super.getEntity();
+    }
+
+    @Override
+    public boolean isCancelled() {
+        return this.cancelled;
+    }
+
+    @Override
+    public void setCancelled(final boolean cancel) {
+        this.cancelled = cancel;
+    }
+
+    @Override
+    public HandlerList getHandlers() {
+        return HANDLER_LIST;
+    }
+
+    public static HandlerList getHandlerList() {
+        return HANDLER_LIST;
+    }
+}

paper-api/src/main/java/org/bukkit/entity/LivingEntity.java

@@ -1159,4 +1159,26 @@ public interface LivingEntity extends Attributable, Damageable, ProjectileSource
         return this.getActiveItemHand();
     }
     // Paper end - active item API
+
+    // Paper start - entity jump API
+    /**
+     * Get entity jump state.
+     * <p>
+     * Jump state will be true when the entity has been marked to jump.
+     *
+     * @return entity jump state.
+     */
+    boolean isJumping();
+
+    /**
+     * Set entity jump state
+     * <p>
+     * Setting to true will mark the entity to jump.
+     * <p>
+     * Setting to false will unmark the entity to jump but will not stop a jump already in-progress.
+     *
+     * @param jumping entity jump state
+     */
+    void setJumping(boolean jumping);
+    // Paper end - entity jump API
 }