diff --git a/metacat-common/src/main/java/com/netflix/metacat/common/MetacatRequestContext.java b/metacat-common/src/main/java/com/netflix/metacat/common/MetacatRequestContext.java
index 7f28875d..1efb31d0 100644
--- a/metacat-common/src/main/java/com/netflix/metacat/common/MetacatRequestContext.java
+++ b/metacat-common/src/main/java/com/netflix/metacat/common/MetacatRequestContext.java
@@ -92,7 +92,7 @@ public class MetacatRequestContext implements Serializable {
      */
     public MetacatRequestContext() {
         this.userName = null;
-        this.clientAppName = null;
+        this.clientAppName = UNKNOWN;
         this.clientId = null;
         this.jobId = null;
         this.dataTypeContext = null;
@@ -198,6 +198,7 @@ public static class MetacatRequestContextBuilder {
         MetacatRequestContextBuilder() {
             this.bApiUri = UNKNOWN;
             this.bScheme = UNKNOWN;
+            this.bClientAppName = UNKNOWN;
         }
 
         /**
diff --git a/metacat-main/src/main/java/com/netflix/metacat/main/api/RequestWrapper.java b/metacat-main/src/main/java/com/netflix/metacat/main/api/RequestWrapper.java
index 23240b85..64f28c00 100644
--- a/metacat-main/src/main/java/com/netflix/metacat/main/api/RequestWrapper.java
+++ b/metacat-main/src/main/java/com/netflix/metacat/main/api/RequestWrapper.java
@@ -154,8 +154,14 @@ public <R> R processRequest(
         if (requestTags != null) {
             tags.putAll(requestTags);
         }
+
         tags.put("request", resourceRequestName);
         tags.put("scheme", MetacatContextManager.getContext().getScheme());
+        String clientAppName =  MetacatContextManager.getContext().getClientAppName();
+        if (clientAppName == null) {
+            clientAppName = "UNKNOWN";
+        }
+        tags.put("caller", clientAppName);
         registry.counter(requestCounterId.withTags(tags)).increment();
 
         try {
@@ -243,6 +249,7 @@ public <R> R processRequest(
         final long start = registry.clock().wallTime();
         final Map<String, String> tags = Maps.newHashMap();
         tags.put("request", resourceRequestName);
+        tags.put("caller", MetacatContextManager.getContext().getClientAppName());
         registry.counter(requestCounterId.withTags(tags)).increment();
         try {
             MetacatContextManager.getContext().setRequestName(resourceRequestName);