Disable MCP server by default

Author: KoolADE85

dash/dash.py

@@ -600,7 +600,7 @@ def __init__(  # pylint: disable=too-many-statements
         self.title = title
 
         # MCP (Model Context Protocol) configuration
-        self._enable_mcp = get_combined_config("mcp_enabled", enable_mcp, True)
+        self._enable_mcp = get_combined_config("mcp_enabled", enable_mcp, False)
         _mcp_path = get_combined_config("mcp_path", mcp_path, "_mcp")
         self._mcp_path = (
             _mcp_path.lstrip("/") if isinstance(_mcp_path, str) else _mcp_path

tests/integration/mcp/conftest.py

@@ -1,8 +1,15 @@
 """Shared helpers for MCP integration tests."""
 
+import pytest
 import requests
 
 
+@pytest.fixture(autouse=True)
+def _enable_mcp_for_integration_tests(monkeypatch):
+    """MCP is off by default; integration tests need it on."""
+    monkeypatch.setenv("DASH_MCP_ENABLED", "true")
+
+
 def _mcp_post(server_url, method, params=None, request_id=1):
     return requests.post(
         f"{server_url}/_mcp",