feat(stock-server): update stock server to use FastMCP for better performance

examples/mcp_example/mock_stock_server.py

@@ -1,33 +1,39 @@
 
-from fastmcp import Server
-from fastmcp.messages import Request, Response
+from fastmcp import FastMCP
+from typing import Dict, Union
 
-# Create MCP server
-mcp = Server("Stock-Mock-Server")
+# Create FastMCP server
+mcp = FastMCP("Stock-Mock-Server")
 
-# Define stock price lookup handler
-@mcp.handler("get_stock_price")
-async def get_stock_price(request: Request) -> Response:
-    # Mock stock price data
-    stock_prices = {
+@mcp.tool()
+def get_stock_price(symbol: str) -> Dict[str, Union[float, str]]:
+    """Get the current price of a stock"""
+    prices = {
         "AAPL": 150.0,
         "GOOGL": 2800.0,
-        "MSFT": 300.0
+        "MSFT": 300.0,
+        "AMZN": 3300.0
     }
+    if symbol not in prices:
+        return {"error": f"Stock {symbol} not found"}
+    return {"price": prices[symbol]}
 
-    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")
+@mcp.tool()
+def calculate_moving_average(prices: list[float], window: int) -> Dict[str, Union[list[float], str]]:
+    """Calculate moving average of stock prices"""
+    if not isinstance(prices, list) or not all(isinstance(x, (int, float)) for x in prices):
+        return {"error": "Invalid price data"}
+    if not isinstance(window, int) or window <= 0:
+        return {"error": "Invalid window size"}
+    if len(prices) < window:
+        return {"error": "Not enough price points"}
+    
+    avgs = []
+    for i in range(len(prices) - window + 1):
+        avg = sum(prices[i:i+window]) / window
+        avgs.append(round(avg, 2))
+    return {"averages": avgs}
 
 if __name__ == "__main__":
     print("Starting Mock Stock Server on port 8001...")
-    # Run server with SSE transport on specified host/port
-    mcp.run(
-        transport="sse",
-        transport_kwargs={
-            "host": "0.0.0.0",
-            "port": 8001
-        }
-    )
+    mcp.run(transport="sse", host="0.0.0.0", port=8001)