diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0cbf617..0980e8c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- manipulation ConveyMetricDemoValues for metrics
 - manipulation SetAlertConditionAndAlertSignalActivationState for alert activation states
 
 ### Changed
diff --git a/src/t2iapi/metric/service.proto b/src/t2iapi/metric/service.proto
index 280eb7b..8851667 100644
--- a/src/t2iapi/metric/service.proto
+++ b/src/t2iapi/metric/service.proto
@@ -115,4 +115,11 @@ service MetricService {
    */
   rpc TransitionProvideValueToExpressNoValueAvailable (BasicHandleRequest)
       returns (BasicResponse);
+
+  /*
+  Convey demo values for the metric with the given handle.
+  This means that the metric value is arbitrary and for demonstration purposes only.
+   */
+  rpc ConveyMetricDemoValues (BasicHandleRequest)
+      returns (BasicResponse);
 }