import asyncio
from mcp import ClientSession, StdioServerParameters
from mcp.client.stdio import stdio_client
async def run_client():
"""
Connect to the MCP server using Standard I/O and call the 'add_numbers' tool.
"""
# Define the parameters to launch the server
# We use 'python server.py --transport stdio' to run the server in stdio mode
server_params = StdioServerParameters(
command="python",
args=["server.py", "--transport", "stdio"],
env=None
)
print("Connecting to MCP server via stdio...")
# Initialize the stdio client
async with stdio_client(server_params) as (read_stream, write_stream):
# Create a session with the server
async with ClientSession(read_stream, write_stream) as session:
# Initialize the session (required)
await session.initialize()
print("Session initialized.")
# List available tools to verify
tools = await session.list_tools()
print(f"Available tools: {[tool.name for tool in tools.tools]}")
# Call the 'add_numbers' tool
print("Calling 'add_numbers' with a=10, b=20...")
result = await session.call_tool("add_numbers", arguments={"a": 10, "b": 20})
# Print the result
print(f"Result: {result.content[0].text}")
if __name__ == "__main__":
asyncio.run(run_client())
