diff --git a/homeassistant/components/mcp_server/http.py b/homeassistant/components/mcp_server/http.py
index 205684d0008..3af6fb4806a 100644
--- a/homeassistant/components/mcp_server/http.py
+++ b/homeassistant/components/mcp_server/http.py
@@ -41,7 +41,7 @@ from mcp.shared.message import SessionMessage
 
 from homeassistant.components import conversation
 from homeassistant.components.http import KEY_HASS, HomeAssistantView
-from homeassistant.const import CONF_LLM_HASS_API
+from homeassistant.const import CONF_LLM_HASS_API, CONTENT_TYPE_JSON
 from homeassistant.core import Context, HomeAssistant, callback
 from homeassistant.helpers import llm
 
@@ -56,10 +56,6 @@ _LOGGER = logging.getLogger(__name__)
 STREAMABLE_API = "/api/mcp"
 TIMEOUT = 60  # Seconds
 
-# Content types
-# pylint: disable-next=home-assistant-duplicate-const
-CONTENT_TYPE_JSON = "application/json"
-
 # Legacy SSE endpoint
 SSE_API = f"/{DOMAIN}/sse"
 MESSAGES_API = f"/{DOMAIN}/messages/{{session_id}}"