diff --git a/src/internal/base-component/__tests__/metrics.test.ts b/src/internal/base-component/__tests__/metrics.test.ts
index 9b24743..c449175 100644
--- a/src/internal/base-component/__tests__/metrics.test.ts
+++ b/src/internal/base-component/__tests__/metrics.test.ts
@@ -55,10 +55,20 @@ describe('Client Metrics support', () => {
     });
 
     test('does nothing when window.AWSC.Clog is undefined', () => {
-      window.AWSC = undefined;
+      window.AWSC = {};
       metrics.sendMetric('name', 0); // only proves no exception thrown
     });
 
+    test('uses panorama API as fallback when AWSC.Clog.log is unavailable', () => {
+      delete window.AWSC;
+      metrics.sendMetric('name', 0);
+      expect(window.panorama).toHaveBeenCalledWith('trackCustomEvent', {
+        eventName: 'name',
+        eventValue: '0',
+        timestamp: expect.any(Number),
+      });
+    });
+
     test('does nothing when window.AWSC.Clog.log is undefined', () => {
       window.AWSC = {
         Clog: undefined,
@@ -68,10 +78,15 @@ describe('Client Metrics support', () => {
 
     describe('within an iframe', () => {
       mockConsoleError();
+      const originalWindowParent = Object.getOwnPropertyDescriptor(window, 'parent')!;
+
+      afterEach(() => {
+        Object.defineProperty(window, 'parent', originalWindowParent);
+        expect(window.parent.AWSC).toBeUndefined();
+      });
+
       const setupIframe = () => {
-        const parentWindow = { ...window };
-        Object.defineProperty(window, 'parent', { value: parentWindow });
-        Object.defineProperty(parentWindow, 'parent', { value: parentWindow });
+        Object.defineProperty(window, 'parent', { configurable: true, writable: true, value: { parent: {} } });
       };
 
       test('does nothing when AWSC is not defined in the parent iframe', () => {
@@ -91,6 +106,8 @@ describe('Client Metrics support', () => {
           },
         };
         jest.spyOn(window.parent.AWSC.Clog, 'log');
+        expect(window.AWSC).toBeUndefined();
+        expect(window.parent.AWSC).toBeDefined();
 
         metrics.sendMetric('name', 0, undefined);
         expect(window.parent.AWSC.Clog.log).toHaveBeenCalledWith('name', 0, undefined);
@@ -173,6 +190,17 @@ describe('Client Metrics support', () => {
   });
 
   describe('sendMetricObject', () => {
+    test('uses panorama API as fallback when AWSC.Clog.log is unavailable', () => {
+      window.AWSC = undefined;
+      metrics.sendMetricObject({ source: 'pkg', action: 'used', version: '5.0' }, 1);
+      expect(window.panorama).toHaveBeenCalledWith('trackCustomEvent', {
+        eventDetail: '{"o":"main","s":"pkg","t":"default","a":"used","f":"react","v":"5.0"}',
+        eventName: 'awsui_pkg_d50',
+        eventValue: '1',
+        timestamp: expect.any(Number),
+      });
+    });
+
     describe('correctly maps input object to metric name', () => {
       test('applies default values for theme (default) and framework (react)', () => {
         metrics.sendMetricObject(
diff --git a/src/internal/base-component/__tests__/panorama-metrics.test.ts b/src/internal/base-component/__tests__/panorama-metrics.test.ts
index dd59cd6..318bdc5 100644
--- a/src/internal/base-component/__tests__/panorama-metrics.test.ts
+++ b/src/internal/base-component/__tests__/panorama-metrics.test.ts
@@ -56,6 +56,14 @@ describe('PanoramaClient', () => {
     expect(consoleSpy).toHaveBeenCalledWith(`Event type for metric is too long: ${eventType}`);
   });
 
+  test('prints an error when event name is too long', () => {
+    const eventName = 'a'.repeat(1001);
+    panorama.sendMetric({ eventName });
+
+    expect(window.panorama).not.toHaveBeenCalled();
+    expect(consoleSpy).toHaveBeenCalledWith(`Event name for metric is too long: ${eventName}`);
+  });
+
   test('prints an error when event value is too long', () => {
     const eventValue = 'a'.repeat(4001);
     panorama.sendMetric({ eventValue });
diff --git a/src/internal/base-component/metrics/log-clients.ts b/src/internal/base-component/metrics/log-clients.ts
index 0b3cb80..647a7af 100644
--- a/src/internal/base-component/metrics/log-clients.ts
+++ b/src/internal/base-component/metrics/log-clients.ts
@@ -11,6 +11,7 @@ interface MetricsWindow extends Window {
 }
 
 export interface MetricsV2EventItem {
+  eventName?: string;
   eventType?: string;
   eventContext?: string;
   eventDetail?: string | Record<string, string | number | boolean>;
@@ -45,6 +46,13 @@ export class CLogClient {
     const AWSC = this.findAWSC(window);
     if (typeof AWSC === 'object' && typeof AWSC.Clog === 'object' && typeof AWSC.Clog.log === 'function') {
       AWSC.Clog.log(metricName, value, detail);
+    } else {
+      new PanoramaClient().sendMetric({
+        eventName: metricName,
+        eventDetail: detail,
+        eventValue: `${value}`,
+        timestamp: Date.now(),
+      });
     }
   }
 
@@ -81,6 +89,10 @@ export class PanoramaClient {
     if (typeof metric.eventValue === 'object') {
       metric.eventValue = JSON.stringify(metric.eventValue);
     }
+    if (!validateLength(metric.eventName, 1000)) {
+      console.error(`Event name for metric is too long: ${metric.eventName}`);
+      return;
+    }
     if (!validateLength(metric.eventDetail, 4000)) {
       console.error(`Event detail for metric is too long: ${metric.eventDetail}`);
       return;