Class MCPServer

src/mcp/server/mcpserver/server.py:130–1099

class MCPServer(Generic[LifespanResultT]):
    def __init__(
        self,
        name: str | None = None,
        title: str | None = None,
        description: str | None = None,
        instructions: str | None = None,
        website_url: str | None = None,
        icons: list[Icon] | None = None,
        version: str | None = None,
        auth_server_provider: OAuthAuthorizationServerProvider[Any, Any, Any] | None = None,
        token_verifier: TokenVerifier | None = None,
        *,
        tools: list[Tool] | None = None,
        resources: list[Resource] | None = None,
        debug: bool = False,
        log_level: Literal["DEBUG", "INFO", "WARNING", "ERROR", "CRITICAL"] = "INFO",
        warn_on_duplicate_resources: bool = True,
        warn_on_duplicate_tools: bool = True,
        warn_on_duplicate_prompts: bool = True,
        dependencies: list[str] | None = None,
        lifespan: Callable[[MCPServer[LifespanResultT]], AbstractAsyncContextManager[LifespanResultT]] | None = None,
        auth: AuthSettings | None = None,
    ):
        self.settings = Settings(
            debug=debug,
            log_level=log_level,
            warn_on_duplicate_resources=warn_on_duplicate_resources,
            warn_on_duplicate_tools=warn_on_duplicate_tools,
            warn_on_duplicate_prompts=warn_on_duplicate_prompts,
            dependencies=dependencies or [],
            lifespan=lifespan,
            auth=auth,
        )
        self.dependencies = self.settings.dependencies

        self._tool_manager = ToolManager(tools=tools, warn_on_duplicate_tools=self.settings.warn_on_duplicate_tools)
        self._resource_manager = ResourceManager(
            resources=resources, warn_on_duplicate_resources=self.settings.warn_on_duplicate_resources
        )
        self._prompt_manager = PromptManager(warn_on_duplicate_prompts=self.settings.warn_on_duplicate_prompts)
        self._lowlevel_server = Server(
            name=name or "mcp-server",
            title=title,
            description=description,
            instructions=instructions,
            website_url=website_url,
            icons=icons,
            version=version,
            on_list_tools=self._handle_list_tools,
            on_call_tool=self._handle_call_tool,
            on_list_resources=self._handle_list_resources,
            on_read_resource=self._handle_read_resource,
            on_list_resource_templates=self._handle_list_resource_templates,
            on_list_prompts=self._handle_list_prompts,
            on_get_prompt=self._handle_get_prompt,
            # TODO(Marcelo): It seems there's a type mismatch between the lifespan type from an MCPServer and Server.
            # We need to create a Lifespan type that is a generic on the server type, like Starlette does.