diff --git a/temporal-sdk/src/main/java/io/temporal/internal/client/external/GenericWorkflowClientImpl.java b/temporal-sdk/src/main/java/io/temporal/internal/client/external/GenericWorkflowClientImpl.java
index a40e66bc4..cee4ffc89 100644
--- a/temporal-sdk/src/main/java/io/temporal/internal/client/external/GenericWorkflowClientImpl.java
+++ b/temporal-sdk/src/main/java/io/temporal/internal/client/external/GenericWorkflowClientImpl.java
@@ -547,15 +547,24 @@ public ExecuteMultiOperationResponse executeMultiOperation(
 
   @Override
   public StartActivityExecutionResponse startActivity(StartActivityExecutionRequest request) {
+    Map<String, String> tags = tagsForStartActivity(request);
+    Scope scope = metricsScope.tagged(tags);
     return grpcRetryer.retryWithResult(
         () ->
             service
                 .blockingStub()
-                .withOption(METRICS_TAGS_CALL_OPTIONS_KEY, metricsScope)
+                .withOption(METRICS_TAGS_CALL_OPTIONS_KEY, scope)
                 .startActivityExecution(request),
         grpcRetryerOptions);
   }
 
+  private static Map<String, String> tagsForStartActivity(StartActivityExecutionRequest request) {
+    return new ImmutableMap.Builder<String, String>(2)
+        .put(MetricsTag.ACTIVITY_TYPE, request.getActivityType().getName())
+        .put(MetricsTag.TASK_QUEUE, request.getTaskQueue().getName())
+        .build();
+  }
+
   @Override
   public PollActivityExecutionResponse pollActivity(PollActivityExecutionRequest request) {
     return grpcRetryer.retryWithResult(
diff --git a/temporal-sdk/src/test/java/io/temporal/client/functional/MetricsTest.java b/temporal-sdk/src/test/java/io/temporal/client/functional/MetricsTest.java
index ce353e940..a7452fb37 100644
--- a/temporal-sdk/src/test/java/io/temporal/client/functional/MetricsTest.java
+++ b/temporal-sdk/src/test/java/io/temporal/client/functional/MetricsTest.java
@@ -3,6 +3,7 @@
 import static io.temporal.testUtils.Eventually.assertEventually;
 import static io.temporal.testing.internal.SDKTestWorkflowRule.NAMESPACE;
 import static junit.framework.TestCase.*;
+import static org.junit.Assume.assumeTrue;
 
 import com.uber.m3.tally.RootScopeBuilder;
 import io.micrometer.core.instrument.*;
@@ -12,9 +13,7 @@
 import io.temporal.activity.LocalActivityOptions;
 import io.temporal.api.common.v1.WorkflowExecution;
 import io.temporal.api.enums.v1.WorkflowTaskFailedCause;
-import io.temporal.client.WorkflowFailedException;
-import io.temporal.client.WorkflowOptions;
-import io.temporal.client.WorkflowStub;
+import io.temporal.client.*;
 import io.temporal.common.reporter.MicrometerClientStatsReporter;
 import io.temporal.failure.ApplicationFailure;
 import io.temporal.failure.CanceledFailure;
@@ -45,13 +44,18 @@ public class MetricsTest {
   public final SDKTestWorkflowRule testWorkflowRule =
       SDKTestWorkflowRule.newBuilder()
           .setWorkflowTypes(QuicklyCompletingWorkflowImpl.class, MultiScenarioWorkflowImpl.class)
-          .setActivityImplementations(runCallbackActivity)
+          .setActivityImplementations(runCallbackActivity, new StandaloneMetricsActivityImpl())
           .setMetricsScope(
               new RootScopeBuilder()
                   .reporter(new MicrometerClientStatsReporter(registry))
                   .reportEvery(com.uber.m3.util.Duration.ofMillis(REPORTING_FLUSH_TIME >> 1)))
           .build();
 
+  private final ActivityClient activityClient =
+      ActivityClient.newInstance(
+          testWorkflowRule.getWorkflowServiceStubs(),
+          ActivityClientOptions.newBuilder().setNamespace(SDKTestWorkflowRule.NAMESPACE).build());
+
   private static final List<Tag> TAGS_NAMESPACE =
       MetricsTag.defaultTags(NAMESPACE).entrySet().stream()
           .map(
@@ -137,6 +141,35 @@ public void testAsynchronousStartAndGetResult() throws InterruptedException, Exe
         });
   }
 
+  @Test
+  public void testStandaloneActivityStartRequestTags() {
+    // SAA is not supported by in-mem test server yet
+    assumeTrue(SDKTestWorkflowRule.useExternalService);
+
+    activityClient.execute(
+        StandaloneMetricsActivity.class,
+        StandaloneMetricsActivity::run,
+        StartActivityOptions.newBuilder()
+            .setId("metrics-standalone-act-" + UUID.randomUUID())
+            .setTaskQueue(testWorkflowRule.getTaskQueue())
+            .setScheduleToCloseTimeout(Duration.ofSeconds(10))
+            .build());
+
+    List<Tag> startActivityRequestTags =
+        replaceTags(
+            tagsNamespaceQueue,
+            MetricsTag.OPERATION_NAME,
+            "StartActivityExecution",
+            MetricsTag.ACTIVITY_TYPE,
+            "StandaloneMetricsActivity");
+
+    assertEventually(
+        Duration.ofSeconds(2),
+        () ->
+            assertIntCounter(
+                1, registry.counter(MetricsType.TEMPORAL_REQUEST, startActivityRequestTags)));
+  }
+
   @Test
   public void testWorkflowSuccess() {
     String result =
@@ -369,4 +402,15 @@ public void runCallback() {
       }
     }
   }
+
+  @ActivityInterface
+  public interface StandaloneMetricsActivity {
+    @ActivityMethod(name = "StandaloneMetricsActivity")
+    void run();
+  }
+
+  public static class StandaloneMetricsActivityImpl implements StandaloneMetricsActivity {
+    @Override
+    public void run() {}
+  }
 }