fix(mcp): resolve client initialization and update server configuration in mcp integration

examples/mcp_example/mock_math_server.py

@@ -5,10 +5,11 @@ from loguru import logger
 
 # Create FastMCP instance with SSE transport
 mcp = FastMCP(
-    host="0.0.0.0",
+    host="0.0.0.0", 
     port=8000,
+    transport="sse",
     require_session_id=False,
-    transport="sse"  # Explicitly specify SSE transport
+    timeout=30.0
 )
 
 @mcp.tool()

swarms/tools/mcp_client.py

@@ -43,6 +43,7 @@ async def _execute_mcp_tool(
     method: Literal["stdio", "sse"] = "sse",
     parameters: Dict[Any, Any] = None,
     output_type: Literal["str", "dict"] = "str",
+    timeout: float = 30.0,
     *args,
     **kwargs,
 ) -> Dict[Any, Any]:

swarms/tools/mcp_integration.py

@@ -297,8 +297,10 @@ class MCPServerSse:
         """Connect to the MCP server with proper locking."""
         async with self._connection_lock:
             if not self.client:
-                self.client = ClientSession()
-                await self.client.connect(self.create_streams())
+                transport = await self.create_streams()
+                read_stream, write_stream = transport
+                self.client = ClientSession(read_stream=read_stream, write_stream=write_stream)
+                await self.client.initialize()
 
     def create_streams(self, **kwargs) -> AbstractAsyncContextManager[Any]:
         return sse_client(
@@ -312,7 +314,7 @@ class MCPServerSse:
         """Parse input while preserving original format."""
         if isinstance(payload, dict):
             return payload
-            
+
         if isinstance(payload, str):
             try:
                 # Try to parse as JSON
@@ -321,37 +323,37 @@ class MCPServerSse:
             except json.JSONDecodeError:
                 # Check if it's a math operation
                 import re
-                
+
                 # Pattern matching for basic math operations
                 add_pattern = r"(?i)(?:what\s+is\s+)?(\d+)\s*(?:plus|\+)\s*(\d+)"
                 mult_pattern = r"(?i)(?:multiply|times|\*)\s*(\d+)\s*(?:and|by)?\s*(\d+)"
                 div_pattern = r"(?i)(?:divide)\s*(\d+)\s*(?:by)\s*(\d+)"
-                
+
                 # Check for addition
                 if match := re.search(add_pattern, payload):
                     a, b = map(int, match.groups())
                     return {"tool_name": "add", "a": a, "b": b}
-                    
+
                 # Check for multiplication
                 if match := re.search(mult_pattern, payload):
                     a, b = map(int, match.groups())
                     return {"tool_name": "multiply", "a": a, "b": b}
-                    
+
                 # Check for division
                 if match := re.search(div_pattern, payload):
                     a, b = map(int, match.groups())
                     return {"tool_name": "divide", "a": a, "b": b}
-                    
+
                 # Default to text input if no pattern matches
                 return {"text": payload}
-        
+
         return {"text": str(payload)}
 
     def _format_output(self, result: Any, original_input: Any) -> str:
         """Format output based on input type and result."""
         if not self.preserve_format:
             return str(result)
-            
+
         try:
             if isinstance(result, (int, float)):
                 # For numeric results, format based on operation
@@ -376,30 +378,30 @@ class MCPServerSse:
         """Call a tool on the MCP server with support for various input formats."""
         if not self.client:
             raise RuntimeError("Not connected to MCP server")
-            
+
         # Store original input for formatting
         original_input = payload
-        
+
         # Parse input
         parsed_payload = self._parse_input(payload)
-        
+
         # Add message to history
         self.messages.append({
             "role": "user",
             "content": str(payload),
             "parsed": parsed_payload
         })
-            
+
         try:
             result = await self.client.call_tool(parsed_payload)
             formatted_result = self._format_output(result, original_input)
-            
+
             self.messages.append({
                 "role": "assistant",
                 "content": formatted_result,
                 "raw_result": result
             })
-            
+
             return formatted_result
         except Exception as e:
             error_msg = f"Error calling tool: {str(e)}"
@@ -502,6 +504,4 @@ async def _batch(params: List[MCPServerSseParams], payload: dict[str, Any] | str
         return [any_to_str(r) for r in results if not isinstance(r, Exception)]
     except Exception as e:
         logger.error(f"Error in batch processing: {e}")
-        return []
-
-
+        return []