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modelcontextprotocol--pytho…/examples/servers/simple-prompt/mcp_simple_prompt/server.py
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chore: import upstream snapshot with attribution
2026-07-13 12:10:27 +08:00

99 lines
3.0 KiB
Python

import anyio
import click
import mcp_types as types
from mcp.server import Server, ServerRequestContext
def create_messages(context: str | None = None, topic: str | None = None) -> list[types.PromptMessage]:
"""Create the messages for the prompt."""
messages: list[types.PromptMessage] = []
# Add context if provided
if context:
messages.append(
types.PromptMessage(
role="user",
content=types.TextContent(type="text", text=f"Here is some relevant context: {context}"),
)
)
# Add the main prompt
prompt = "Please help me with "
if topic:
prompt += f"the following topic: {topic}"
else:
prompt += "whatever questions I may have."
messages.append(types.PromptMessage(role="user", content=types.TextContent(type="text", text=prompt)))
return messages
async def handle_list_prompts(
ctx: ServerRequestContext, params: types.PaginatedRequestParams | None
) -> types.ListPromptsResult:
return types.ListPromptsResult(
prompts=[
types.Prompt(
name="simple",
title="Simple Assistant Prompt",
description="A simple prompt that can take optional context and topic arguments",
arguments=[
types.PromptArgument(
name="context",
description="Additional context to consider",
required=False,
),
types.PromptArgument(
name="topic",
description="Specific topic to focus on",
required=False,
),
],
)
]
)
async def handle_get_prompt(ctx: ServerRequestContext, params: types.GetPromptRequestParams) -> types.GetPromptResult:
if params.name != "simple":
raise ValueError(f"Unknown prompt: {params.name}")
arguments = params.arguments or {}
return types.GetPromptResult(
messages=create_messages(context=arguments.get("context"), topic=arguments.get("topic")),
description="A simple prompt with optional context and topic arguments",
)
@click.command()
@click.option("--port", default=8000, help="Port to listen on for HTTP")
@click.option(
"--transport",
type=click.Choice(["stdio", "streamable-http"]),
default="stdio",
help="Transport type",
)
def main(port: int, transport: str) -> int:
app = Server(
"mcp-simple-prompt",
on_list_prompts=handle_list_prompts,
on_get_prompt=handle_get_prompt,
)
if transport == "streamable-http":
import uvicorn
uvicorn.run(app.streamable_http_app(), host="127.0.0.1", port=port)
else:
from mcp.server.stdio import stdio_server
async def arun():
async with stdio_server() as streams:
await app.run(streams[0], streams[1], app.create_initialization_options())
anyio.run(arun)
return 0