diff --git a/src/server/push_notification/default_push_notification_sender.ts b/src/server/push_notification/default_push_notification_sender.ts
index d3dd50cf..3782f78f 100644
--- a/src/server/push_notification/default_push_notification_sender.ts
+++ b/src/server/push_notification/default_push_notification_sender.ts
@@ -82,6 +82,15 @@ export class DefaultPushNotificationSender implements PushNotificationSender {
         headers[this.options.tokenHeaderName] = pushConfig.token;
       }
 
+      if (pushConfig.authentication && pushConfig.authentication.credentials) {
+        const { schemes, credentials } = pushConfig.authentication;
+        if (schemes.includes('Bearer')) {
+          headers['Authorization'] = `Bearer ${credentials}`;
+        } else if (schemes.includes('Basic')) {
+          headers['Authorization'] = `Basic ${credentials}`;
+        }
+      }
+
       const response = await fetch(url, {
         method: 'POST',
         headers,
diff --git a/test/server/push_notification_integration.spec.ts b/test/server/push_notification_integration.spec.ts
index 08ce1ec6..210fa3ac 100644
--- a/test/server/push_notification_integration.spec.ts
+++ b/test/server/push_notification_integration.spec.ts
@@ -700,5 +700,150 @@ describe('Push Notification Integration Tests', () => {
         );
       });
     });
+    it('should send correct Authorization header when authentication config is provided', async () => {
+      const pushConfig: PushNotificationConfig = {
+        id: 'auth-test-config',
+        url: `${testServerUrl}/notify`,
+        authentication: {
+          schemes: ['Bearer', 'Basic'],
+          credentials: 'test-credentials',
+        },
+      };
+
+      const params: MessageSendParams = {
+        message: createTestMessage('Test with authentication'),
+        configuration: {
+          pushNotificationConfig: pushConfig,
+        },
+      };
+
+      // Mock the agent executor to publish completion
+      mockAgentExecutor.execute.callsFake(async (ctx, bus) => {
+        const taskId = ctx.taskId;
+        const contextId = ctx.contextId;
+
+        bus.publish({
+          id: taskId,
+          contextId,
+          status: { state: 'working' },
+          kind: 'task',
+        });
+
+        bus.publish({
+          taskId,
+          contextId,
+          kind: 'status-update',
+          status: { state: 'completed' },
+          final: true,
+        });
+
+        bus.finished();
+      });
+
+      await handler.sendMessage(params);
+
+      // Wait for async push notifications to be sent
+      await new Promise((resolve) => setTimeout(resolve, 200));
+
+      // Verify notification received
+      assert.lengthOf(
+        receivedNotifications,
+        2,
+        'Should send notifications for working and completed states'
+      );
+
+      // Check the last notification (completed)
+      const notification = receivedNotifications[1];
+
+      // Verify Authorization header
+      // Bearer should be prioritized over Basic
+      assert.equal(
+        notification.headers['authorization'],
+        'Bearer test-credentials',
+        'Should prioritize Bearer scheme'
+      );
+    });
+
+    it('should send Bearer Authorization header', async () => {
+      const pushConfig: PushNotificationConfig = {
+        id: 'bearer-auth-test',
+        url: `${testServerUrl}/notify`,
+        authentication: {
+          schemes: ['Bearer'],
+          credentials: 'bearer-token',
+        },
+      };
+
+      const params: MessageSendParams = {
+        message: createTestMessage('Test with Bearer auth'),
+        configuration: {
+          pushNotificationConfig: pushConfig,
+        },
+      };
+
+      mockAgentExecutor.execute.callsFake(async (ctx, bus) => {
+        bus.publish({
+          id: ctx.taskId,
+          contextId: ctx.contextId,
+          status: { state: 'working' },
+          kind: 'task',
+        });
+        bus.publish({
+          taskId: ctx.taskId,
+          contextId: ctx.contextId,
+          kind: 'status-update',
+          status: { state: 'completed' },
+          final: true,
+        });
+        bus.finished();
+      });
+
+      await handler.sendMessage(params);
+      await new Promise((resolve) => setTimeout(resolve, 200));
+
+      assert.lengthOf(receivedNotifications, 2);
+      assert.equal(receivedNotifications[1].headers['authorization'], 'Bearer bearer-token');
+    });
+
+    it('should send Basic Authorization header', async () => {
+      const pushConfig: PushNotificationConfig = {
+        id: 'basic-auth-test',
+        url: `${testServerUrl}/notify`,
+        authentication: {
+          schemes: ['Basic'],
+          credentials: 'basic-creds',
+        },
+      };
+
+      const params: MessageSendParams = {
+        message: createTestMessage('Test with Basic auth'),
+        configuration: {
+          pushNotificationConfig: pushConfig,
+        },
+      };
+
+      mockAgentExecutor.execute.callsFake(async (ctx, bus) => {
+        bus.publish({
+          id: ctx.taskId,
+          contextId: ctx.contextId,
+          status: { state: 'working' },
+          kind: 'task',
+        });
+        bus.publish({
+          taskId: ctx.taskId,
+          contextId: ctx.contextId,
+          kind: 'status-update',
+          status: { state: 'completed' },
+          final: true,
+        });
+        bus.finished();
+      });
+
+      await handler.sendMessage(params);
+      await new Promise((resolve) => setTimeout(resolve, 200));
+
+      assert.lengthOf(receivedNotifications, 2);
+      assert.equal(receivedNotifications[1].headers['authorization'], 'Basic basic-creds');
+    });
   });
 });