diff --git a/src/fgai/graylog_mcp.py b/src/fgai/graylog_mcp.py
index 5b61423..fab925c 100644
--- a/src/fgai/graylog_mcp.py
+++ b/src/fgai/graylog_mcp.py
@@ -9,13 +9,22 @@ from urllib import error, request
 class GraylogMcpClient:
     """Small Streamable HTTP MCP client used for Graylog connection checks."""
 
-    def __init__(self, url: str, token: str, *, timeout: int = 15, verify_tls: bool = True) -> None:
+    def __init__(self, url: str, token: str, *, timeout: int = 15, verify_tls: bool = True, use_proxy: bool = False) -> None:
         self.url = url.rstrip("/")
         self.token = token
         self.timeout = timeout
         self.verify_tls = verify_tls
+        self.use_proxy = use_proxy
         self.session_id: str | None = None
 
+    def _open(self, req: request.Request, context: ssl.SSLContext | None):
+        if self.use_proxy:
+            return request.urlopen(req, timeout=self.timeout, context=context)
+        handlers = [request.ProxyHandler({})]
+        if context is not None:
+            handlers.append(request.HTTPSHandler(context=context))
+        return request.build_opener(*handlers).open(req, timeout=self.timeout)
+
     def _call(self, method: str, params: dict[str, object] | None = None, *, notification: bool = False) -> dict[str, object]:
         payload: dict[str, object] = {"jsonrpc": "2.0", "method": method}
         if not notification:
@@ -33,7 +42,7 @@ class GraylogMcpClient:
         req = request.Request(self.url, data=json.dumps(payload).encode("utf-8"), method="POST", headers=headers)
         try:
             context = None if self.verify_tls else ssl._create_unverified_context()
-            with request.urlopen(req, timeout=self.timeout, context=context) as response:
+            with self._open(req, context) as response:
                 self.session_id = response.headers.get("Mcp-Session-Id", self.session_id)
                 body = response.read().decode("utf-8")
         except error.HTTPError as exc:
diff --git a/tests/test_graylog_mcp.py b/tests/test_graylog_mcp.py
index d57c1d5..5c78c99 100644
--- a/tests/test_graylog_mcp.py
+++ b/tests/test_graylog_mcp.py
@@ -1,7 +1,7 @@
 import json
 import unittest
 from urllib.error import HTTPError
-from unittest.mock import patch
+from unittest.mock import Mock, patch
 
 from fgai.graylog_mcp import GraylogMcpClient
 
@@ -34,7 +34,7 @@ class GraylogMcpTests(unittest.TestCase):
             _Response({}),
             _Response({"result": {"tools": [{"name": "search_messages"}, {"name": "aggregate_messages"}]}}),
         ])
-        with patch("fgai.graylog_mcp.request.urlopen", side_effect=responses):
+        with patch("fgai.graylog_mcp.GraylogMcpClient._open", side_effect=responses):
             status = GraylogMcpClient("http://graylog/api/mcp", "raw-token").probe()
         self.assertEqual(status["status"], "connected")
         self.assertIn("search_messages", status["tools"])
@@ -48,7 +48,7 @@ class GraylogMcpTests(unittest.TestCase):
         client = GraylogMcpClient("http://graylog/api/mcp", "raw-token")
         client.session_id = "existing-session"
 
-        with patch("fgai.graylog_mcp.request.urlopen", side_effect=responses):
+        with patch("fgai.graylog_mcp.GraylogMcpClient._open", side_effect=responses):
             client.probe()
 
         self.assertEqual(client.session_id, "session-1")
@@ -64,12 +64,25 @@ class GraylogMcpTests(unittest.TestCase):
         client = GraylogMcpClient("http://graylog/api/mcp", "raw-token")
         client.session_id = "old-session"
 
-        with patch("fgai.graylog_mcp.request.urlopen", side_effect=responses):
+        with patch("fgai.graylog_mcp.GraylogMcpClient._open", side_effect=responses):
             result = client.call_tool("search_messages", {"query": "*"})
 
         self.assertEqual(result["result"]["content"], [])
         self.assertEqual(client.session_id, "session-2")
 
+    def test_default_open_bypasses_environment_proxies(self):
+        client = GraylogMcpClient("http://graylog/api/mcp", "raw-token")
+        req = object()
+        opener = Mock()
+        opener.open.return_value = "response"
+
+        with patch("fgai.graylog_mcp.request.build_opener", return_value=opener) as build_opener:
+            result = client._open(req, None)
+
+        self.assertEqual(result, "response")
+        self.assertEqual(opener.open.call_args.kwargs["timeout"], 15)
+        self.assertEqual(build_opener.call_args.args[0].proxies, {})
+
 
 if __name__ == "__main__":
     unittest.main()