502 while using localhost sse #2707

import datetime

from mcp.server.fastmcp import FastMCP

mcp = FastMCP("real-fastmcp-server", port=9999)

@mcp.tool()
def echo(text: str) -> str:
    """
    Echo back input text with timestamp

    Args:
        text: input text

    Returns:
        str: input text with timestamp
    """
    timestamp = datetime.datetime.now().isoformat()
    return f"[{timestamp}] Echo: {text}"


if __name__ == "__main__":
    mcp.run(transport='sse')

import asyncio

from google.adk.tools.mcp_tool.mcp_toolset import MCPToolset, SseConnectionParams

async def main():
    connection_params = SseConnectionParams(url="http://localhost:9999/sse")
    toolset = MCPToolset(connection_params=connection_params)
    tools = await toolset.get_tools()

if __name__ == "__main__":
    asyncio.run(main())