diff --git a/api/controllers/mcp/mcp.py b/api/controllers/mcp/mcp.py
index 110283c630..7245767c9b 100644
--- a/api/controllers/mcp/mcp.py
+++ b/api/controllers/mcp/mcp.py
@@ -18,10 +18,8 @@ from models.model import App, AppMCPServer, AppMode
 class MCPAppApi(Resource):
     def post(self, server_code):
         def int_or_str(value):
-            if isinstance(value, int):
+            if isinstance(value, (int, str)):
                 return value
-            elif isinstance(value, str):
-                return int(value)
             else:
                 return None
 
@@ -31,6 +29,7 @@ class MCPAppApi(Resource):
         parser.add_argument("params", type=dict, required=False, location="json")
         parser.add_argument("id", type=int_or_str, required=False, location="json")
         args = parser.parse_args()
+
         server = db.session.query(AppMCPServer).filter(AppMCPServer.server_code == server_code).first()
         if not server:
             raise NotFound("Server Not Found")
diff --git a/api/core/mcp/server/handler.py b/api/core/mcp/server/handler.py
index 7884e8c90b..2e9e7718e1 100644
--- a/api/core/mcp/server/handler.py
+++ b/api/core/mcp/server/handler.py
@@ -123,7 +123,7 @@ class MCPServerReuqestHandler:
             db.session.add(end_user)
             db.session.commit()
         return types.InitializeResult(
-            protocolVersion=types.LATEST_PROTOCOL_VERSION,
+            protocolVersion=types.SERVER_LATEST_PROTOCOL_VERSION,
             capabilities=self.capabilities,
             serverInfo=types.Implementation(name="Dify", version=dify_config.CURRENT_VERSION),
             instructions=self.mcp_server.description,
diff --git a/api/core/mcp/types.py b/api/core/mcp/types.py
index 75c063f7dd..1c1726c799 100644
--- a/api/core/mcp/types.py
+++ b/api/core/mcp/types.py
@@ -30,9 +30,10 @@ for reference.
 * Define additional model classes instead of using dictionaries. Do this even if they're
   not separate types in the schema.
 """
-
+# Client support both version, not support 2025-06-18 yet.
 LATEST_PROTOCOL_VERSION = "2025-03-26"
-
+# Server support 2024-11-05 to allow claude to use.
+SERVER_LATEST_PROTOCOL_VERSION = "2024-11-05"
 ProgressToken = str | int
 Cursor = str
 Role = Literal["user", "assistant"]