diff --git a/strix/runtime/docker_runtime.py b/strix/runtime/docker_runtime.py
index eef88fc..9b6bcb5 100644
--- a/strix/runtime/docker_runtime.py
+++ b/strix/runtime/docker_runtime.py
@@ -320,7 +320,7 @@ class DockerRuntime(AbstractRuntime):
         import httpx
 
         try:
-            async with httpx.AsyncClient() as client:
+            async with httpx.AsyncClient(trust_env=False) as client:
                 response = await client.post(
                     f"{api_url}/register_agent",
                     params={"agent_id": agent_id},
@@ -337,7 +337,7 @@ class DockerRuntime(AbstractRuntime):
             container = self.client.containers.get(container_id)
             container.reload()
 
-            host = "localhost"
+            host = "127.0.0.1"
             if "DOCKER_HOST" in os.environ:
                 docker_host = os.environ["DOCKER_HOST"]
                 if "://" in docker_host:
diff --git a/strix/tools/executor.py b/strix/tools/executor.py
index 1ea15db..d69033a 100644
--- a/strix/tools/executor.py
+++ b/strix/tools/executor.py
@@ -62,7 +62,7 @@ async def _execute_tool_in_sandbox(tool_name: str, agent_state: Any, **kwargs: A
         "Content-Type": "application/json",
     }
 
-    async with httpx.AsyncClient() as client:
+    async with httpx.AsyncClient(trust_env=False) as client:
         try:
             response = await client.post(
                 request_url, json=request_data, headers=headers, timeout=None