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from typing import Literal

import anyio

import mcp.types as types

from mcp import Client

from mcp.client import advertise

EXTENSION_ID = "com.example/search"

class SearchParams(types.RequestParams):

query: str

limit: int = 10

class SearchResult(types.Result):

items: list[str]

class SearchRequest(types.Request[SearchParams, Literal["com.example/search"]]):

method: Literal["com.example/search"] = "com.example/search"

params: SearchParams

async def main() -> None:

async with Client("http://localhost:8000/mcp", extensions=[advertise(EXTENSION_ID)]) as client:

request = SearchRequest(params=SearchParams(query="mcp", limit=3))

result = await client.session.send_request(request, SearchResult)

print(result.items)

# ['mcp-0', 'mcp-1', 'mcp-2']

if __name__ == "__main__":

anyio.run(main)