diff --git a/google-cloud-logging/src/main/java/com/google/cloud/logging/spi/v2/ConfigClient.java b/google-cloud-logging/src/main/java/com/google/cloud/logging/spi/v2/ConfigClient.java
index 4ca4168a1d0c..f188dbc88692 100644
--- a/google-cloud-logging/src/main/java/com/google/cloud/logging/spi/v2/ConfigClient.java
+++ b/google-cloud-logging/src/main/java/com/google/cloud/logging/spi/v2/ConfigClient.java
@@ -29,6 +29,7 @@
 import com.google.logging.v2.SinkNameOneof;
 import com.google.logging.v2.UpdateSinkRequest;
 import com.google.protobuf.Empty;
+import com.google.protobuf.ExperimentalApi;
 import io.grpc.ManagedChannel;
 import java.io.Closeable;
 import java.io.IOException;
@@ -94,6 +95,7 @@
  * </pre>
  */
 @Generated("by GAPIC")
+@ExperimentalApi
 public class ConfigClient implements AutoCloseable {
   private final ConfigSettings settings;
   private final ScheduledExecutorService executor;
diff --git a/google-cloud-logging/src/main/java/com/google/cloud/logging/spi/v2/LoggingClient.java b/google-cloud-logging/src/main/java/com/google/cloud/logging/spi/v2/LoggingClient.java
index 652b5084353d..17a83d7ee384 100644
--- a/google-cloud-logging/src/main/java/com/google/cloud/logging/spi/v2/LoggingClient.java
+++ b/google-cloud-logging/src/main/java/com/google/cloud/logging/spi/v2/LoggingClient.java
@@ -35,6 +35,7 @@
 import com.google.logging.v2.WriteLogEntriesRequest;
 import com.google.logging.v2.WriteLogEntriesResponse;
 import com.google.protobuf.Empty;
+import com.google.protobuf.ExperimentalApi;
 import io.grpc.ManagedChannel;
 import java.io.Closeable;
 import java.io.IOException;
@@ -100,6 +101,7 @@
  * </pre>
  */
 @Generated("by GAPIC")
+@ExperimentalApi
 public class LoggingClient implements AutoCloseable {
   private final LoggingSettings settings;
   private final ScheduledExecutorService executor;
diff --git a/google-cloud-logging/src/main/java/com/google/cloud/logging/spi/v2/MetricsClient.java b/google-cloud-logging/src/main/java/com/google/cloud/logging/spi/v2/MetricsClient.java
index e76ab3eb110d..af0aeb7cb9e9 100644
--- a/google-cloud-logging/src/main/java/com/google/cloud/logging/spi/v2/MetricsClient.java
+++ b/google-cloud-logging/src/main/java/com/google/cloud/logging/spi/v2/MetricsClient.java
@@ -29,6 +29,7 @@
 import com.google.logging.v2.ParentNameOneof;
 import com.google.logging.v2.UpdateLogMetricRequest;
 import com.google.protobuf.Empty;
+import com.google.protobuf.ExperimentalApi;
 import io.grpc.ManagedChannel;
 import java.io.Closeable;
 import java.io.IOException;
@@ -93,6 +94,7 @@
  * </pre>
  */
 @Generated("by GAPIC")
+@ExperimentalApi
 public class MetricsClient implements AutoCloseable {
   private final MetricsSettings settings;
   private final ScheduledExecutorService executor;