diff --git a/samples/python/agents/langgraph/__main__.py b/samples/python/agents/langgraph/__main__.py
index 3935206b8..065ef2ff3 100644
--- a/samples/python/agents/langgraph/__main__.py
+++ b/samples/python/agents/langgraph/__main__.py
@@ -2,10 +2,11 @@
 import os
 
 import click
+import httpx
 
 from a2a.server.apps import A2AStarletteApplication
 from a2a.server.request_handlers import DefaultRequestHandler
-from a2a.server.tasks import InMemoryTaskStore
+from a2a.server.tasks import InMemoryTaskStore, InMemoryPushNotifier
 from a2a.types import (
     AgentCapabilities,
     AgentCard,
@@ -59,12 +60,11 @@ def main(host, port):
             skills=[skill],
         )
 
-        # Add push notification support back when SDK ready
-        # notification_sender_auth = PushNotificationSenderAuth()
-        # notification_sender_auth.generate_jwk()
+        httpx_client = httpx.AsyncClient()
         request_handler = DefaultRequestHandler(
             agent_executor=CurrencyAgentExecutor(),
             task_store=InMemoryTaskStore(),
+            push_notifier=InMemoryPushNotifier(httpx_client),
         )
         server = A2AStarletteApplication(
             agent_card=agent_card, http_handler=request_handler
diff --git a/samples/python/agents/llama_index_file_chat/__main__.py b/samples/python/agents/llama_index_file_chat/__main__.py
index 3cba5778e..7874230b6 100644
--- a/samples/python/agents/llama_index_file_chat/__main__.py
+++ b/samples/python/agents/llama_index_file_chat/__main__.py
@@ -2,10 +2,11 @@
 import os
 
 import click
+import httpx
 
 from a2a.server.apps import A2AStarletteApplication
 from a2a.server.request_handlers import DefaultRequestHandler
-from a2a.server.tasks import InMemoryTaskStore
+from a2a.server.tasks import InMemoryTaskStore, InMemoryPushNotifier
 from a2a.types import (
     AgentCapabilities,
     AgentCard,
@@ -13,7 +14,6 @@
 )
 from agent_executor import LlamaIndexAgentExecutor
 from agents.llama_index_file_chat.agent import ParseAndChat
-from common.utils.push_notification_auth import PushNotificationSenderAuth
 from dotenv import load_dotenv
 
 
@@ -65,14 +65,13 @@ def main(host, port):
             skills=[skill],
         )
 
-        notification_sender_auth = PushNotificationSenderAuth()
-        notification_sender_auth.generate_jwk()
+        httpx_client = httpx.AsyncClient()
         request_handler = DefaultRequestHandler(
             agent_executor=LlamaIndexAgentExecutor(
                 agent=ParseAndChat(),
-                notification_sender_auth=notification_sender_auth,
             ),
             task_store=InMemoryTaskStore(),
+            push_notifier=InMemoryPushNotifier(httpx_client),
         )
         server = A2AStarletteApplication(
             agent_card=agent_card, http_handler=request_handler
diff --git a/samples/python/agents/llama_index_file_chat/agent_executor.py b/samples/python/agents/llama_index_file_chat/agent_executor.py
index 7103b7141..d27bdf8d8 100644
--- a/samples/python/agents/llama_index_file_chat/agent_executor.py
+++ b/samples/python/agents/llama_index_file_chat/agent_executor.py
@@ -26,7 +26,6 @@
     LogEvent,
     ParseAndChat,
 )
-from common.utils.push_notification_auth import PushNotificationSenderAuth
 from typing_extensions import override
 
 
@@ -49,10 +48,8 @@ class LlamaIndexAgentExecutor(AgentExecutor):
     def __init__(
         self,
         agent: ParseAndChat,
-        notification_sender_auth: PushNotificationSenderAuth,
     ):
         self.agent = agent
-        self.notification_sender_auth = notification_sender_auth
         # Store context state by session ID
         # Ideally, you would use a database or other kv store the context state
         self.ctx_states: Dict[str, Dict[str, Any]] = {}
diff --git a/samples/python/agents/marvin/__main__.py b/samples/python/agents/marvin/__main__.py
index d88dee0d1..ed562893d 100644
--- a/samples/python/agents/marvin/__main__.py
+++ b/samples/python/agents/marvin/__main__.py
@@ -6,15 +6,15 @@
 import logging
 
 import click
+import httpx
+
 from a2a.server.apps import A2AStarletteApplication
 from a2a.server.request_handlers import DefaultRequestHandler
-from a2a.server.tasks import InMemoryTaskStore
+from a2a.server.tasks import InMemoryTaskStore, InMemoryPushNotifier
 from a2a.types import AgentCapabilities, AgentCard, AgentSkill
 from agents.marvin.agent import ExtractorAgent
-from agents.marvin.task_manager import AgentTaskManager
 from common.server import A2AServer
 from common.types import AgentCapabilities, AgentCard, AgentSkill
-from common.utils.push_notification_auth import PushNotificationSenderAuth
 from dotenv import load_dotenv
 from pydantic import BaseModel, EmailStr, Field
 
@@ -56,9 +56,11 @@ def main(host, port, result_type, instructions):
         logger.error(f"Invalid result type: {e}")
         exit(1)
     agent = ExtractorAgent(instructions=instructions, result_type=result_type)
+    httpx_client = httpx.AsyncClient()
     request_handler = DefaultRequestHandler(
         agent_executor=ExtractorAgentExecutor(agent=agent),
         task_store=InMemoryTaskStore(),
+        push_notifier=InMemoryPushNotifier(httpx_client),
     )
     server = A2AStarletteApplication(
         agent_card=get_agent_card(host, port), http_handler=request_handler
diff --git a/samples/python/agents/semantickernel/__main__.py b/samples/python/agents/semantickernel/__main__.py
index 7795793ff..fd3e91bd4 100644
--- a/samples/python/agents/semantickernel/__main__.py
+++ b/samples/python/agents/semantickernel/__main__.py
@@ -1,10 +1,11 @@
 import logging
 
 import click
+import httpx
 
 from a2a.server.apps import A2AStarletteApplication
 from a2a.server.request_handlers import DefaultRequestHandler
-from a2a.server.tasks import InMemoryTaskStore
+from a2a.server.tasks import InMemoryTaskStore, InMemoryPushNotifier
 from a2a.types import AgentCapabilities, AgentCard, AgentSkill
 from agent_executor import SemanticKernelTravelAgentExecutor
 from common.types import AgentCapabilities, AgentCard, AgentSkill
@@ -22,9 +23,11 @@
 @click.option('--port', default=10020)
 def main(host, port):
     """Starts the Semantic Kernel Agent server using A2A."""
+    httpx_client = httpx.AsyncClient()
     request_handler = DefaultRequestHandler(
         agent_executor=SemanticKernelTravelAgentExecutor(),
         task_store=InMemoryTaskStore(),
+        push_notifier=InMemoryPushNotifier(httpx_client),
     )
 
     server = A2AStarletteApplication(
@@ -36,7 +39,7 @@ def main(host, port):
 
 
 def get_agent_card(host: str, port: int):
-    """Returns the Agent Card for the Sementic Kernel Travel Agent."""
+    """Returns the Agent Card for the Semantic Kernel Travel Agent."""
 
     # Build the agent card
     capabilities = AgentCapabilities(streaming=True)