drawio-mcp

drawio-mcp

Enables local creation and maintenance of editable draw.io XML diagram files, with tools for inspecting, validating, and updating diagrams.

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README

Local Draw.io MCP

本地 STDIO MCP 服务,用于让 Codex 直接创建和维护可编辑的 draw.io XML 文件。

工具

  • server_info:查看版本及允许访问的目录。
  • create_diagram:根据分组、节点和连线创建 .drawio。
  • inspect_diagram:读取第一页的节点、连线和几何信息。
  • validate_diagram:检查重复 ID、无效坐标、越界、失效连线和节点重叠。
  • update_diagram:添加节点/连线,或修改已有节点。

文件中的文字只作为数据处理,不作为 MCP 指令执行。

本地运行

npm install
npm test
npm start

npm start 使用 STDIO,正常启动后会等待 MCP 客户端连接,不会显示交互式界面。

接入 Codex

在 Codex 桌面版中打开“设置 → MCP servers → Add server”,选择 STDIO,然后填写:

  • Command:C:\Program Files\nodejs\node.exe
  • Arguments:本项目的 src\server.mjs 绝对路径
  • Working directory:本项目目录

也可复制 config.example.toml 的内容到 ~/.codex/config.toml,修改其中路径后重启 Codex。

在 Codex CLI 中可运行:

codex mcp list

在会话输入框中可使用 /mcp 查看连接状态。

路径限制

通过以下环境变量控制访问范围,Windows 下使用分号分隔多个目录:

  • DRAWIO_MCP_READ_ROOTS
  • DRAWIO_MCP_WRITE_ROOTS

未配置时仅允许访问本 MCP 项目目录。建议只开放项目工作区,不要把整个磁盘配置为可写。

调用示例

连接后可直接告诉 Codex:

使用 drawio MCP 创建一个包含数据平台层、预警引擎层和响应反馈层的 主动预警系统.drawio,完成后运行 validate_diagram 校验。

创建工具默认不会覆盖已有文件;需要覆盖时必须显式传入 overwrite=true。

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