diff --git a/src/main/java/org/prebid/server/proto/openrtb/ext/request/ExtRequestPrebid.java b/src/main/java/org/prebid/server/proto/openrtb/ext/request/ExtRequestPrebid.java
index f3e1df8e7b1..71e1a2f2130 100644
--- a/src/main/java/org/prebid/server/proto/openrtb/ext/request/ExtRequestPrebid.java
+++ b/src/main/java/org/prebid/server/proto/openrtb/ext/request/ExtRequestPrebid.java
@@ -23,6 +23,11 @@ public class ExtRequestPrebid {
     @JsonDeserialize(using = IntegerFlagDeserializer.class)
     Integer debug;
 
+    /**
+     * Defines the contract for bidrequest.ext.prebid.trace
+     */
+    TraceLevel trace;
+
     /**
      * Defines the contract for bidrequest.ext.prebid.aliases
      */
diff --git a/src/main/java/org/prebid/server/proto/openrtb/ext/request/TraceLevel.java b/src/main/java/org/prebid/server/proto/openrtb/ext/request/TraceLevel.java
new file mode 100644
index 00000000000..b680bb7646e
--- /dev/null
+++ b/src/main/java/org/prebid/server/proto/openrtb/ext/request/TraceLevel.java
@@ -0,0 +1,6 @@
+package org.prebid.server.proto.openrtb.ext.request;
+
+public enum TraceLevel {
+
+    basic, verbose
+}