给 Claude Code 添加 MCP server：免费工具该暴露什么

原文标题：Add an MCP server to Claude Code: what free tools expose

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把远程 MCP server 接入 Claude Code 只需一条命令：给 Claude Code 一个名称和服务器地址，服务器连上后其工具即可在同一会话中供智能体调用。更难的是服务器一侧——要决定无密钥、无付费的用户能做什么，文章以自家 server 为例展示这两部分。

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The current commands to connect a remote MCP server to Claude Code, then what a server's free tools should and should not offer, using our own four.

Connecting one takes a single command: you give Claude Code a name and the server's address, and once the server connects its tools are available to the agent, in the same session for a remote server. The harder part is on the other side: a server decides what anyone may do with no key and no payment. We show both halves, using our own server at https://mcp.aiskills402.com/mcp as the worked example.