diff --git a/caraml-store-serving/src/main/java/dev/caraml/serving/monitoring/ServingMetrics.java b/caraml-store-serving/src/main/java/dev/caraml/serving/monitoring/ServingMetrics.java
index f2e328f..114d4a0 100644
--- a/caraml-store-serving/src/main/java/dev/caraml/serving/monitoring/ServingMetrics.java
+++ b/caraml-store-serving/src/main/java/dev/caraml/serving/monitoring/ServingMetrics.java
@@ -61,11 +61,18 @@ private List<Counter> newEntityCounters(GetOnlineFeaturesRequest featureRequest)
         .toList();
   }
 
+  private Counter newKeyRetrievalCounter(String project) {
+    return Counter.builder("caraml_serving_key_retrieval_count")
+        .tag("project", project)
+        .register(registry);
+  }
+
   @Override
   public void onRequestReceived(ReqT requestMessage) {
     if (requestMessage instanceof GetOnlineFeaturesRequest featureRequest) {
       String project = featureRequest.getProject();
       newServingRequestCounter(project).increment();
+      newKeyRetrievalCounter(project).increment(featureRequest.getEntityRowsCount());
       newEntityCounters(featureRequest)
           .forEach(counter -> counter.increment(featureRequest.getEntityRowsCount()));
     }
diff --git a/caraml-store-serving/src/main/java/dev/caraml/serving/store/StoreService.java b/caraml-store-serving/src/main/java/dev/caraml/serving/store/StoreService.java
index dbe786d..41345a0 100644
--- a/caraml-store-serving/src/main/java/dev/caraml/serving/store/StoreService.java
+++ b/caraml-store-serving/src/main/java/dev/caraml/serving/store/StoreService.java
@@ -56,7 +56,7 @@ public StoreService(OnlineRetriever retriever, FeatureSpecService specService) {
   }
 
   public GetOnlineFeaturesResponseV2 getOnlineFeaturesV2(GetOnlineFeaturesRequest request) {
-    if(request.getEntityRowsList().isEmpty()) {
+    if (request.getEntityRowsList().isEmpty()) {
       throw new IllegalArgumentException("Entity rows cannot be empty");
     }
 
@@ -77,7 +77,7 @@ public GetOnlineFeaturesResponseV2 getOnlineFeaturesV2(GetOnlineFeaturesRequest
   }
 
   public GetOnlineFeaturesResponse getOnlineFeatures(GetOnlineFeaturesRequest request) {
-    if(request.getEntityRowsList().isEmpty()) {
+    if (request.getEntityRowsList().isEmpty()) {
       throw new IllegalArgumentException("Entity rows cannot be empty");
     }