diff --git a/http-service/src/main/java/net/runelite/http/service/item/ItemController.java b/http-service/src/main/java/net/runelite/http/service/item/ItemController.java
index f064cf22b1..d98f8ede54 100644
--- a/http-service/src/main/java/net/runelite/http/service/item/ItemController.java
+++ b/http-service/src/main/java/net/runelite/http/service/item/ItemController.java
@@ -30,7 +30,9 @@ import java.time.Duration;
 import java.time.Instant;
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.HashSet;
 import java.util.List;
+import java.util.Set;
 import java.util.concurrent.TimeUnit;
 import java.util.stream.Collectors;
 import javax.servlet.http.HttpServletResponse;
@@ -197,9 +199,16 @@ public class ItemController
 			itemIds = Arrays.copyOf(itemIds, MAX_BATCH_LOOKUP);
 		}
 
+		Set<Integer> seen = new HashSet<>();
 		List<ItemPrice> itemPrices = new ArrayList<>(itemIds.length);
 		for (int itemId : itemIds)
 		{
+			if (seen.contains(itemId))
+			{
+				continue;
+			}
+			seen.add(itemId);
+
 			ItemEntry item = itemService.getItem(itemId);
 			PriceEntry priceEntry = itemService.getPrice(itemId, null);