MCP Servers

mcp-guardian

A gateway that enforces permissions, sanitization, approval, and audit for AI agent MCP tool calls, with a policy engine and local proxy CLI.

README

MCP Guardian

AI Agent 调用 MCP 工具前的权限、脱敏、审批与审计网关。

仓库：https://github.com/Ailian0206/mcp-guardian

状态

Week 1：策略引擎与最小 Gateway。决策源见 docs/product-plan.md。

包结构

apps/web                 Dashboard / 落地页（Week 3 升级 Next.js）
packages/gateway         本地 MCP 代理 CLI
packages/policy-engine   策略评估
packages/shared          共享类型
packages/demo-servers    红队演示 MCP Server
policies/                默认 fail-closed 策略

开发

pnpm install
pnpm lint && pnpm typecheck && pnpm test
pnpm build

# A1/A2：允许工作区读 / 拒绝系统写
pnpm guardian eval --policy policies/default.fail-closed.yaml \
  --server demo-fs --tool read_file --args '{"path":"/workspace/a.txt"}'

bash scenarios/a1-a2.sh

Cursor 接入示例

先 pnpm build，再在 MCP 配置中指向 Gateway（示例）：

{
  "mcpServers": {
    "guardian-demo-fs": {
      "command": "node",
      "args": [
        "/ABS/PATH/mcp-guardian/packages/gateway/dist/cli.js",
        "start",
        "--config",
        "/ABS/PATH/mcp-guardian/mcp-guardian.config.yaml"
      ]
    }
  }
}

下游 demo-fs 由配置文件启动；危险写路径会被策略 deny。

文档

文档	说明
产品总方案	决策源
四周推进计划	Week 0–5
架构说明	包边界与错误码
GitHub 流程	分支 / PR / 合并

License

MIT

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