diff --git a/runelite-api/src/main/java/net/runelite/api/Client.java b/runelite-api/src/main/java/net/runelite/api/Client.java
index 63e9bda05a..ea9355d739 100644
--- a/runelite-api/src/main/java/net/runelite/api/Client.java
+++ b/runelite-api/src/main/java/net/runelite/api/Client.java
@@ -419,4 +419,22 @@ public interface Client extends GameEngine
 	void setProjectilesHidden(boolean state);
 
 	CollisionData[] getCollisionMaps();
+
+	@VisibleForDevtools
+	int[] getBoostedSkillLevels();
+
+	@VisibleForDevtools
+	int[] getRealSkillLevels();
+
+	@VisibleForDevtools
+	int[] getSkillExperiences();
+
+	@VisibleForDevtools
+	int[] getChangedSkills();
+
+	@VisibleForDevtools
+	int getChangedSkillsCount();
+
+	@VisibleForDevtools
+	void setChangedSkillsCount(int i);
 }
diff --git a/runelite-client/src/main/java/net/runelite/client/plugins/devtools/DevToolsPlugin.java b/runelite-client/src/main/java/net/runelite/client/plugins/devtools/DevToolsPlugin.java
index deba2b4f9a..daca9042a7 100644
--- a/runelite-client/src/main/java/net/runelite/client/plugins/devtools/DevToolsPlugin.java
+++ b/runelite-client/src/main/java/net/runelite/client/plugins/devtools/DevToolsPlugin.java
@@ -29,6 +29,7 @@ import com.google.common.eventbus.Subscribe;
 import com.google.inject.Provides;
 import java.awt.Font;
 import java.awt.image.BufferedImage;
+import static java.lang.Math.min;
 import java.util.Arrays;
 import java.util.Collection;
 import javax.imageio.ImageIO;
@@ -36,6 +37,8 @@ import javax.inject.Inject;
 import lombok.extern.slf4j.Slf4j;
 import net.runelite.api.ChatMessageType;
 import net.runelite.api.Client;
+import net.runelite.api.Experience;
+import net.runelite.api.Skill;
 import net.runelite.api.events.CommandExecuted;
 import net.runelite.api.events.VarbitChanged;
 import net.runelite.api.widgets.Widget;
@@ -157,6 +160,24 @@ public class DevToolsPlugin extends Plugin
 				eventBus.post(new VarbitChanged()); // fake event
 				break;
 			}
+			case "addxp":
+			{
+				Skill skill = Skill.valueOf(args[0].toUpperCase());
+				int xp = Integer.parseInt(args[1]);
+
+				int totalXp = client.getSkillExperience(skill) + xp;
+				int level = min(Experience.getLevelForXp(totalXp), 99);
+
+				client.getBoostedSkillLevels()[skill.ordinal()] = level;
+				client.getRealSkillLevels()[skill.ordinal()] = level;
+				client.getSkillExperiences()[skill.ordinal()] = totalXp;
+
+				int[] skills = client.getChangedSkills();
+				int count = client.getChangedSkillsCount();
+				skills[++count - 1 & 31] = skill.ordinal();
+				client.setChangedSkillsCount(count);
+				break;
+			}
 		}
 	}
 
diff --git a/runescape-api/src/main/java/net/runelite/rs/api/RSClient.java b/runescape-api/src/main/java/net/runelite/rs/api/RSClient.java
index e1c5ba235a..7ba51dcd1a 100644
--- a/runescape-api/src/main/java/net/runelite/rs/api/RSClient.java
+++ b/runescape-api/src/main/java/net/runelite/rs/api/RSClient.java
@@ -101,14 +101,29 @@ public interface RSClient extends RSGameEngine, Client
 	int getBaseY();
 
 	@Import("boostedSkillLevels")
+	@Override
 	int[] getBoostedSkillLevels();
 
 	@Import("realSkillLevels")
+	@Override
 	int[] getRealSkillLevels();
 
 	@Import("skillExperiences")
+	@Override
 	int[] getSkillExperiences();
 
+	@Import("changedSkills")
+	@Override
+	int[] getChangedSkills();
+
+	@Import("changedSkillsCount")
+	@Override
+	int getChangedSkillsCount();
+
+	@Import("changedSkillsCount")
+	@Override
+	void setChangedSkillsCount(int i);
+
 	@Import("gameState")
 	int getRSGameState();