diff --git a/src/a2a/compat/v0_3/rest_transport.py b/src/a2a/compat/v0_3/rest_transport.py
index 362946736..9ee74e2b9 100644
--- a/src/a2a/compat/v0_3/rest_transport.py
+++ b/src/a2a/compat/v0_3/rest_transport.py
@@ -260,8 +260,20 @@ async def list_task_push_notification_configs(
         context: ClientCallContext | None = None,
     ) -> ListTaskPushNotificationConfigsResponse:
         """Lists push notification configurations for a specific task."""
-        raise NotImplementedError(
-            'list_task_push_notification_configs not supported in v0.3 REST'
+        response_data = await self._execute_request(
+            'GET',
+            f'/v1/tasks/{request.task_id}/pushNotificationConfigs',
+            context=context,
+        )
+        resp_proto = ParseDict(
+            response_data,
+            a2a_v0_3_pb2.ListTaskPushNotificationConfigResponse(),
+            ignore_unknown_fields=True,
+        )
+        return conversions.to_core_list_task_push_notification_config_response(
+            proto_utils.FromProto.list_task_push_notification_config_response(
+                resp_proto
+            )
         )
 
     async def delete_task_push_notification_config(
diff --git a/tests/compat/v0_3/test_rest_transport.py b/tests/compat/v0_3/test_rest_transport.py
index e627b444f..7ad838d9f 100644
--- a/tests/compat/v0_3/test_rest_transport.py
+++ b/tests/compat/v0_3/test_rest_transport.py
@@ -510,10 +510,43 @@ async def test_compat_rest_transport_list_tasks(transport):
 async def test_compat_rest_transport_list_task_push_notification_configs(
     transport,
 ):
-    with pytest.raises(NotImplementedError):
-        await transport.list_task_push_notification_configs(
-            ListTaskPushNotificationConfigsRequest()
-        )
+    mock_execute_request = AsyncMock(
+        return_value={
+            'configs': [
+                {
+                    'name': 'tasks/task-123/pushNotificationConfigs/push-1',
+                    'pushNotificationConfig': {
+                        'url': 'http://push-1',
+                        'id': 'push-1',
+                    },
+                },
+                {
+                    'name': 'tasks/task-123/pushNotificationConfigs/push-2',
+                    'pushNotificationConfig': {
+                        'url': 'http://push-2',
+                        'id': 'push-2',
+                    },
+                },
+            ]
+        }
+    )
+    transport._execute_request = mock_execute_request
+
+    response = await transport.list_task_push_notification_configs(
+        ListTaskPushNotificationConfigsRequest(task_id='task-123')
+    )
+
+    mock_execute_request.assert_awaited_once_with(
+        'GET', '/v1/tasks/task-123/pushNotificationConfigs', context=None
+    )
+    assert list(response.configs) == [
+        TaskPushNotificationConfig(
+            id='push-1', task_id='task-123', url='http://push-1'
+        ),
+        TaskPushNotificationConfig(
+            id='push-2', task_id='task-123', url='http://push-2'
+        ),
+    ]
 
 
 @pytest.mark.asyncio