fix: correct port binding in MCP stock server implementation

examples/mcp_example/mock_stock_server.py

@@ -1,30 +1,33 @@
 
-from fastmcp import FastMCP
-import time
+from fastmcp import Server
+from fastmcp.messages import Request, Response
 
-# Initialize MCP server
-mcp = FastMCP("Stock-Mock-Server")
+# Create MCP server
+mcp = Server("Stock-Mock-Server")
 
-@mcp.tool()
-def calculate_simple_moving_average(prices: list[float], period: int) -> float:
-    """Calculate Simple Moving Average"""
-    try:
-        time.sleep(0.1)  # Simulate processing time
-        if len(prices) < period:
-            return {"error": "Not enough data points"}
-        return sum(prices[-period:]) / period
-    except Exception as e:
-        return {"error": f"Error calculating SMA: {str(e)}"}
-
-@mcp.tool()
-def calculate_percentage_change(old_value: float, new_value: float) -> float:
-    """Calculate percentage change between two values"""
-    try:
-        time.sleep(0.1)  # Simulate processing time
-        return ((new_value - old_value) / old_value) * 100
-    except Exception as e:
-        return {"error": f"Error calculating percentage change: {str(e)}"}
+# Define stock price lookup handler
+@mcp.handler("get_stock_price")
+async def get_stock_price(request: Request) -> Response:
+    # Mock stock price data
+    stock_prices = {
+        "AAPL": 150.0,
+        "GOOGL": 2800.0,
+        "MSFT": 300.0
+    }
+    
+    symbol = request.data.get("symbol")
+    if symbol in stock_prices:
+        return Response(data={"price": stock_prices[symbol]})
+    else:
+        return Response(error=f"Stock {symbol} not found")
 
 if __name__ == "__main__":
     print("Starting Mock Stock Server on port 8001...")
-    mcp.run(transport="sse", port=8001)
+    # Run server with SSE transport on specified host/port
+    mcp.run(
+        transport="sse",
+        transport_kwargs={
+            "host": "0.0.0.0",
+            "port": 8001
+        }
+    )