MCP ARCHITECTURE

Core Components

MCP客户端

In addition to managing requests and responses, the MCP client processes notifications from MCP servers, providing real-time updates about task progress and system status. It also performs sampling to gather data on tool usage and performance, enabling optimization and informed decision-making.

除了管理请求和响应之外，MCP 客户端还会处理来自 MCP 服务器的通知，提供有关任务进度和系统状态的实时更新。 它还执行采样以收集有关工具使用和性能的数据，从而实现优化和知情的决策。

<aside> 💡

• Sampling is a powerful MCP feature that allows servers to request LLM completions through the client, enabling sophisticated agentic behaviors while maintaining security and privacy. - MCP Spec
• Notifications are sent from the client to the server or vice versa, as a one-way message. The receiver MUST NOT send a response. - MCP Spec </aside>

MCP Server Lifecycle

三个关键阶段：创建、运行和更新。