[Auth] Dynamically add agent_id header to requests

src/agentex/lib/adk/_modules/acp.py

@@ -4,7 +4,7 @@
 from temporalio.common import RetryPolicy
 
 from agentex import AsyncAgentex
-from agentex.lib.adk.utils._modules.client import get_async_agentex_client
+from agentex.lib.adk.utils._modules.client import create_async_agentex_client
 from agentex.lib.core.services.adk.acp.acp import ACPService
 from agentex.lib.core.temporal.activities.activity_helpers import ActivityHelpers
 from agentex.lib.core.temporal.activities.adk.acp.acp_activities import (
@@ -41,7 +41,7 @@ def __init__(self, acp_service: ACPService | None = None):
             acp_activities (Optional[ACPActivities]): Optional pre-configured ACP activities. If None, will be auto-initialized.
         """
         if acp_service is None:
-            agentex_client = get_async_agentex_client()
+            agentex_client = create_async_agentex_client()
             tracer = AsyncTracer(agentex_client)
             self._acp_service = ACPService(agentex_client=agentex_client, tracer=tracer)
         else:

src/agentex/lib/adk/_modules/agent_task_tracker.py

@@ -3,7 +3,7 @@
 from temporalio.common import RetryPolicy
 
 from agentex import AsyncAgentex
-from agentex.lib.adk.utils._modules.client import get_async_agentex_client
+from agentex.lib.adk.utils._modules.client import create_async_agentex_client
 from agentex.lib.core.services.adk.agent_task_tracker import AgentTaskTrackerService
 from agentex.lib.core.temporal.activities.activity_helpers import ActivityHelpers
 from agentex.lib.core.temporal.activities.adk.agent_task_tracker_activities import (
@@ -34,7 +34,7 @@ def __init__(
         agent_task_tracker_service: AgentTaskTrackerService | None = None,
     ):
         if agent_task_tracker_service is None:
-            agentex_client = get_async_agentex_client()
+            agentex_client = create_async_agentex_client()
             tracer = AsyncTracer(agentex_client)
             self._agent_task_tracker_service = AgentTaskTrackerService(
                 agentex_client=agentex_client, tracer=tracer

src/agentex/lib/adk/_modules/agents.py

@@ -1,7 +1,7 @@
 from datetime import timedelta
 from typing import Optional
 
-from agentex.lib.adk.utils._modules.client import get_async_agentex_client
+from agentex.lib.adk.utils._modules.client import create_async_agentex_client
 from agentex.lib.core.temporal.activities.adk.agents_activities import AgentsActivityName, GetAgentParams
 from temporalio.common import RetryPolicy
 
@@ -29,7 +29,7 @@ def __init__(
         agents_service: Optional[AgentsService] = None,
     ):
         if agents_service is None:
-            agentex_client = get_async_agentex_client()
+            agentex_client = create_async_agentex_client()
             tracer = AsyncTracer(agentex_client)
             self._agents_service = AgentsService(agentex_client=agentex_client, tracer=tracer)
         else:

src/agentex/lib/adk/_modules/events.py

@@ -3,7 +3,7 @@
 from temporalio.common import RetryPolicy
 
 from agentex import AsyncAgentex
-from agentex.lib.adk.utils._modules.client import get_async_agentex_client
+from agentex.lib.adk.utils._modules.client import create_async_agentex_client
 from agentex.lib.core.services.adk.events import EventsService
 from agentex.lib.core.temporal.activities.activity_helpers import ActivityHelpers
 from agentex.lib.core.temporal.activities.adk.events_activities import (
@@ -33,7 +33,7 @@ def __init__(
         events_service: EventsService | None = None,
     ):
         if events_service is None:
-            agentex_client = get_async_agentex_client()
+            agentex_client = create_async_agentex_client()
             tracer = AsyncTracer(agentex_client)
             self._events_service = EventsService(
                 agentex_client=agentex_client, tracer=tracer

src/agentex/lib/adk/_modules/messages.py

@@ -3,7 +3,7 @@
 from temporalio.common import RetryPolicy
 
 from agentex import AsyncAgentex
-from agentex.lib.adk.utils._modules.client import get_async_agentex_client
+from agentex.lib.adk.utils._modules.client import create_async_agentex_client
 from agentex.lib.core.adapters.streams.adapter_redis import RedisStreamRepository
 from agentex.lib.core.services.adk.messages import MessagesService
 from agentex.lib.core.services.adk.streaming import StreamingService
@@ -38,7 +38,7 @@ def __init__(
         messages_service: MessagesService | None = None,
     ):
         if messages_service is None:
-            agentex_client = get_async_agentex_client()
+            agentex_client = create_async_agentex_client()
             stream_repository = RedisStreamRepository()
             streaming_service = StreamingService(
                 agentex_client=agentex_client,

src/agentex/lib/adk/_modules/state.py

@@ -5,7 +5,7 @@
 from temporalio.common import RetryPolicy
 
 from agentex import AsyncAgentex
-from agentex.lib.adk.utils._modules.client import get_async_agentex_client
+from agentex.lib.adk.utils._modules.client import create_async_agentex_client
 from agentex.lib.core.services.adk.state import StateService
 from agentex.lib.core.temporal.activities.activity_helpers import ActivityHelpers
 from agentex.lib.core.temporal.activities.adk.state_activities import (
@@ -37,7 +37,7 @@ def __init__(
         state_service: StateService | None = None,
     ):
         if state_service is None:
-            agentex_client = get_async_agentex_client()
+            agentex_client = create_async_agentex_client()
             tracer = AsyncTracer(agentex_client)
             self._state_service = StateService(
                 agentex_client=agentex_client, tracer=tracer

src/agentex/lib/adk/_modules/streaming.py

@@ -1,7 +1,7 @@
 from temporalio.common import RetryPolicy
 
 from agentex import AsyncAgentex
-from agentex.lib.adk.utils._modules.client import get_async_agentex_client
+from agentex.lib.adk.utils._modules.client import create_async_agentex_client
 from agentex.lib.core.adapters.streams.adapter_redis import RedisStreamRepository
 from agentex.lib.core.services.adk.streaming import (
     StreamingService,
@@ -35,7 +35,7 @@ def __init__(self, streaming_service: StreamingService | None = None):
         """
         if streaming_service is None:
             stream_repository = RedisStreamRepository()
-            agentex_client = get_async_agentex_client()
+            agentex_client = create_async_agentex_client()
             self._streaming_service = StreamingService(
                 agentex_client=agentex_client,
                 stream_repository=stream_repository,

src/agentex/lib/adk/_modules/tasks.py

@@ -3,7 +3,7 @@
 from temporalio.common import RetryPolicy
 
 from agentex import AsyncAgentex
-from agentex.lib.adk.utils._modules.client import get_async_agentex_client
+from agentex.lib.adk.utils._modules.client import create_async_agentex_client
 from agentex.lib.core.services.adk.tasks import TasksService
 from agentex.lib.core.temporal.activities.activity_helpers import ActivityHelpers
 from agentex.lib.core.temporal.activities.adk.tasks_activities import (
@@ -32,7 +32,7 @@ def __init__(
         tasks_service: TasksService | None = None,
     ):
         if tasks_service is None:
-            agentex_client = get_async_agentex_client()
+            agentex_client = create_async_agentex_client()
             tracer = AsyncTracer(agentex_client)
             self._tasks_service = TasksService(
                 agentex_client=agentex_client, tracer=tracer

src/agentex/lib/adk/_modules/tracing.py

@@ -6,7 +6,7 @@
 from temporalio.common import RetryPolicy
 
 from agentex import AsyncAgentex
-from agentex.lib.adk.utils._modules.client import get_async_agentex_client
+from agentex.lib.adk.utils._modules.client import create_async_agentex_client
 from agentex.lib.core.services.adk.tracing import TracingService
 from agentex.lib.core.temporal.activities.activity_helpers import ActivityHelpers
 from agentex.lib.core.temporal.activities.adk.tracing_activities import (
@@ -39,7 +39,7 @@ def __init__(self, tracing_service: TracingService | None = None):
             tracing_activities (Optional[TracingActivities]): Optional pre-configured tracing activities. If None, will be auto-initialized.
         """
         if tracing_service is None:
-            agentex_client = get_async_agentex_client()
+            agentex_client = create_async_agentex_client()
             tracer = AsyncTracer(agentex_client)
             self._tracing_service = TracingService(tracer=tracer)
         else:

src/agentex/lib/adk/providers/_modules/litellm.py

@@ -1,6 +1,7 @@
 from collections.abc import AsyncGenerator
 from datetime import timedelta
 
+from agentex.lib.adk.utils._modules.client import create_async_agentex_client
 from temporalio.common import RetryPolicy
 
 from agentex import AsyncAgentex
@@ -39,7 +40,7 @@ def __init__(
     ):
         if litellm_service is None:
             # Create default service
-            agentex_client = AsyncAgentex()
+            agentex_client = create_async_agentex_client()
             stream_repository = RedisStreamRepository()
             streaming_service = StreamingService(
                 agentex_client=agentex_client,

src/agentex/lib/adk/providers/_modules/openai.py

@@ -1,6 +1,7 @@
 from datetime import timedelta
 from typing import Any, Literal
 
+from agentex.lib.adk.utils._modules.client import create_async_agentex_client
 from agents import Agent, RunResult, RunResultStreaming
 from agents.agent import StopAtTools, ToolsToFinalOutputFunction
 from agents.agent_output import AgentOutputSchemaBase
@@ -46,7 +47,7 @@ def __init__(
     ):
         if openai_service is None:
             # Create default service
-            agentex_client = AsyncAgentex()
+            agentex_client = create_async_agentex_client()
             stream_repository = RedisStreamRepository()
             streaming_service = StreamingService(
                 agentex_client=agentex_client,

src/agentex/lib/adk/providers/_modules/sgp.py

@@ -1,5 +1,6 @@
 from datetime import timedelta
 
+from agentex.lib.adk.utils._modules.client import create_async_agentex_client
 from scale_gp import SGPClient, SGPClientError
 from temporalio.common import RetryPolicy
 
@@ -33,7 +34,7 @@ def __init__(
         if sgp_service is None:
             try:
                 sgp_client = SGPClient()
-                agentex_client = AsyncAgentex()
+                agentex_client = create_async_agentex_client()
                 tracer = AsyncTracer(agentex_client)
                 self._sgp_service = SGPService(sgp_client=sgp_client, tracer=tracer)
             except SGPClientError:

src/agentex/lib/adk/utils/_modules/client.py

@@ -1,43 +1,28 @@
-import threading
-from typing import Dict, Optional, Any
+import httpx
 
 from agentex import AsyncAgentex
-from agentex.lib.environment_variables import EnvironmentVariables, refreshed_environment_variables
+from agentex.lib.environment_variables import EnvironmentVariables
+from agentex.lib.utils.logging import make_logger
 
-_client: Optional["AsyncAgentex"] = None
-_cached_headers: Dict[str, str] = {}
-_init_kwargs: Dict[str, Any] = {}
-_lock = threading.RLock()
+logger = make_logger(__name__)
 
 
-def _build_headers() -> Dict[str, str]:
-    EnvironmentVariables.refresh()
-    if refreshed_environment_variables and getattr(refreshed_environment_variables, "AGENT_ID", None):
-        return {"x-agent-identity": refreshed_environment_variables.AGENT_ID}
-    return {}
+class EnvAuth(httpx.Auth):
+    def __init__(self, header_name="x-agent-identity"):
+        self.header_name = header_name
 
+    def auth_flow(self, request):
+        # This gets called for every request
+        env_vars = EnvironmentVariables.refresh()
+        if env_vars:
+            agent_id = env_vars.AGENT_ID
+            if agent_id:
+                request.headers[self.header_name] = agent_id
+                logger.info(f"Adding header {self.header_name}:{agent_id}")
+        yield request
 
-def get_async_agentex_client(**kwargs) -> "AsyncAgentex":
-    """
-    Return a cached AsyncAgentex instance (created synchronously).
-    Each call re-checks env vars and updates client.default_headers if needed.
-    """
-    global _client, _cached_headers, _init_kwargs
 
-    new_headers = _build_headers()
-
-    with _lock:
-        # First time (or kwargs changed) -> build a new client
-        if _client is None or kwargs != _init_kwargs:
-            _client = AsyncAgentex(default_headers=new_headers.copy(), **kwargs)
-            _cached_headers = new_headers
-            _init_kwargs = dict(kwargs)
-            return _client
-
-        # Same client; maybe headers changed
-        if new_headers != _cached_headers:
-            _cached_headers = new_headers
-            _client.default_headers.clear()
-            _client.default_headers.update(new_headers)
-
-        return _client
+def create_async_agentex_client(**kwargs) -> AsyncAgentex:
+    client = AsyncAgentex(**kwargs)
+    client._client.auth = EnvAuth()
+    return client

src/agentex/lib/adk/utils/_modules/templating.py

@@ -1,6 +1,7 @@
 from datetime import timedelta
 from typing import Any
 
+from agentex.lib.adk.utils._modules.client import create_async_agentex_client
 from temporalio.common import RetryPolicy
 
 from agentex import AsyncAgentex
@@ -39,7 +40,7 @@ def __init__(
             templating_service (Optional[TemplatingService]): Optional pre-configured templating service. If None, will be auto-initialized.
         """
         if templating_service is None:
-            agentex_client = AsyncAgentex()
+            agentex_client = create_async_agentex_client()
             tracer = AsyncTracer(agentex_client)
             self._templating_service = TemplatingService(tracer=tracer)
         else:

src/agentex/lib/core/temporal/activities/__init__.py

@@ -1,3 +1,4 @@
+from agentex.lib.adk.utils._modules.client import create_async_agentex_client
 from scale_gp import SGPClient, SGPClientError
 
 from agentex import AsyncAgentex
@@ -58,7 +59,7 @@ def get_all_activities(sgp_client=None):
 
     llm_gateway = LiteLLMGateway()
     stream_repository = RedisStreamRepository()
-    agentex_client = AsyncAgentex()
+    agentex_client = create_async_agentex_client()
     tracer = AsyncTracer(agentex_client)
 
     # Services

src/agentex/lib/core/tracing/processors/agentex_tracing_processor.py

@@ -1,6 +1,7 @@
 from typing import Any, Dict, override
 
 from agentex import Agentex, AsyncAgentex
+from agentex.lib.adk.utils._modules.client import create_async_agentex_client
 from agentex.lib.core.tracing.processors.tracing_processor_interface import (
     AsyncTracingProcessor,
     SyncTracingProcessor,
@@ -65,7 +66,7 @@ def shutdown(self) -> None:
 
 class AgentexAsyncTracingProcessor(AsyncTracingProcessor):
     def __init__(self, config: AgentexTracingProcessorConfig):
-        self.client = AsyncAgentex()
+        self.client = create_async_agentex_client()
 
     @override
     async def on_span_start(self, span: Span) -> None:

src/agentex/lib/environment_variables.py

@@ -4,12 +4,15 @@
 from enum import Enum
 from pathlib import Path
 
+from agentex.lib.utils.logging import make_logger
 from dotenv import load_dotenv
 
 from agentex.lib.utils.model_utils import BaseModel
 
 PROJECT_ROOT = Path(__file__).resolve().parents[2]
 
+logger = make_logger(__name__)
+
 
 class EnvVarKeys(str, Enum):
     ENVIRONMENT = "ENVIRONMENT"
@@ -37,7 +40,7 @@ class Environment(str, Enum):
     PROD = "production"
 
 
-refreshed_environment_variables = None
+refreshed_environment_variables: "EnvironmentVariables" | None = None
 
 
 class EnvironmentVariables(BaseModel):
@@ -64,6 +67,7 @@ def refresh(cls) -> EnvironmentVariables | None:
         if refreshed_environment_variables is not None:
             return refreshed_environment_variables
 
+        logger.info("Refreshing environment variables")
         if os.environ.get(EnvVarKeys.ENVIRONMENT) == Environment.DEV:
             # Load global .env file first
             global_env_path = PROJECT_ROOT / ".env"

src/agentex/lib/sdk/fastacp/base/base_acp_server.py

@@ -9,7 +9,7 @@
 
 import httpx
 import uvicorn
-from agentex.lib.adk.utils._modules.client import get_async_agentex_client
+from agentex.lib.adk.utils._modules.client import create_async_agentex_client
 from fastapi import FastAPI, Request
 from fastapi.responses import StreamingResponse
 from pydantic import TypeAdapter, ValidationError
@@ -397,9 +397,10 @@ async def _register_agent(self, env_vars: EnvironmentVariables):
 
                         os.environ["AGENT_ID"] = agent_id
                         os.environ["AGENT_NAME"] = agent_name
-                        refreshed_environment_variables.AGENT_ID = agent_id
-                        refreshed_environment_variables.AGENT_NAME = agent_name
-                        get_async_agentex_client()  # refresh cache
+                        env_vars.AGENT_ID = agent_id
+                        env_vars.AGENT_NAME = agent_name
+                        global refreshed_environment_variables
+                        refreshed_environment_variables = env_vars
                         logger.info(
                             f"Successfully registered agent '{env_vars.AGENT_NAME}' with Agentex server with acp_url: {full_acp_url}. Registration data: {registration_data}"
                         )

src/agentex/lib/sdk/fastacp/impl/agentic_base_acp.py

@@ -1,4 +1,6 @@
 from typing import Any
+
+from agentex.lib.adk.utils._modules.client import create_async_agentex_client
 from typing_extensions import override
 from agentex import AsyncAgentex
 from agentex.lib.sdk.fastacp.base.base_acp_server import BaseACPServer
@@ -24,7 +26,7 @@ class AgenticBaseACP(BaseACPServer):
     def __init__(self):
         super().__init__()
         self._setup_handlers()
-        self._agentex_client = AsyncAgentex()
+        self._agentex_client = create_async_agentex_client()
 
     @classmethod
     @override