diff --git a/src/main/java/fr/eni/demo/bll/StockService.java b/src/main/java/fr/eni/demo/bll/StockService.java
index cd738ab..355c5b4 100644
--- a/src/main/java/fr/eni/demo/bll/StockService.java
+++ b/src/main/java/fr/eni/demo/bll/StockService.java
@@ -10,5 +10,6 @@ public interface StockService {
   void add(Stock game);
   Optional<Stock> findById(Long gameId);
   List<StockCount> findAllByName(String name);
+  Stock findByRef(String ref);
 }
 
diff --git a/src/main/java/fr/eni/demo/bll/StockServiceImpl.java b/src/main/java/fr/eni/demo/bll/StockServiceImpl.java
index acb94d7..14c0053 100644
--- a/src/main/java/fr/eni/demo/bll/StockServiceImpl.java
+++ b/src/main/java/fr/eni/demo/bll/StockServiceImpl.java
@@ -3,6 +3,7 @@ package fr.eni.demo.bll;
 import fr.eni.demo.bo.Stock;
 import fr.eni.demo.bo.StockCount;
 import fr.eni.demo.dal.StockRepository;
+import jakarta.persistence.EntityNotFoundException;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
@@ -39,4 +40,13 @@ public class StockServiceImpl implements StockService{
       .toList();
     return result;
   }
+
+  @Override
+  public Stock findByRef(String ref) {
+    Stock stock = stockRepository.findByRefEQ(ref);
+    if (stock == null) {
+      throw new EntityNotFoundException("Ref non valide");
+    }
+    return stock;
+  }
 }
diff --git a/src/main/java/fr/eni/demo/controller/StockController.java b/src/main/java/fr/eni/demo/controller/StockController.java
index 72fb38c..d090010 100644
--- a/src/main/java/fr/eni/demo/controller/StockController.java
+++ b/src/main/java/fr/eni/demo/controller/StockController.java
@@ -41,6 +41,12 @@ public class StockController {
     return buildResponse("List stock fetched", true, result);
   }
 
+  @GetMapping("/{ref}")
+  public ResponseEntity<Map<String, Object>> findByRef(@PathVariable String ref) {
+    Stock result = stockService.findByRef(ref);
+    return buildResponse("Stock fetched", true, result);
+  }
+
   private ResponseEntity<Map<String, Object>> buildResponse(String message, boolean status, Object data) {
     Map<String, Object> response = new HashMap<>();
     response.put("message", message);
diff --git a/src/main/java/fr/eni/demo/dal/StockRepository.java b/src/main/java/fr/eni/demo/dal/StockRepository.java
index 0f1b568..aab81b2 100644
--- a/src/main/java/fr/eni/demo/dal/StockRepository.java
+++ b/src/main/java/fr/eni/demo/dal/StockRepository.java
@@ -9,4 +9,5 @@ import java.util.List;
 @Repository
 public interface StockRepository extends MongoRepository<Stock,Long> {
   List<Stock> findByNameIsContainingIgnoreCase(String name);
+  Stock findByRefEQ(String ref);
 }