Shield MCP Server

@modelShield

代码仓库

基本信息

分类

其他

传输方式

stdio

作者

modelShield

关于 Shield MCP Server

A shield for logging, deep debug and sanitization for MCP servers at development stage

#mcp #security #middleware

Shield MCP Server 配置

使用下面的配置,将此服务器添加到你的 MCP 客户端。

{
  "mcpServers": {
    "shieldmcp": {
      "command": "python",
      "args": [
        "-m",
        "venv",
        "venv"
      ]
    }
  }
}

Shield MCP Server 工具

工具列表暂未提供

当前收录暂时没有可展示的工具列表，不代表服务没有工具。请查阅项目文档了解支持的能力。

工具是从 README 中自动提取的。维护者可以在 ## Tools 标题下列出工具,即可填充这部分内容。

概览

What is Shield MCP?

Shield MCP is a security middleware for Model Context Protocol (MCP) servers. It enhances security and monitoring capabilities—like access control, output sanitization, and rate limiting—without modifying the official MCP SDK. It is designed for developers who want to secure and audit MCP tool calls following best practices.

How to use Shield MCP?

Install via pip (Python 3.8+ required), then import the decorator and helpers. Decorate your MCP tool functions with @secure_tool, passing an allowed tools whitelist, an optional sanitizer function, user/session IDs, and rate limit configuration. The middleware automatically enforces access control, sanitizes outputs, logs calls, and applies rate limits.

Key features of Shield MCP

Whitelist-based tool access control
Configurable result sanitization (text length, sensitive patterns)
Structured audit logging via structlog
Token‑bucket rate limiting (requests per minute, burst size)
Standardized error handling and formatting
Compatible with MCP Inspector

Use cases of Shield MCP

Restrict which tools a client can call in a multi‑user MCP server
Sanitize tool outputs to remove credit card numbers or email addresses
Log all tool invocations with user and session IDs for compliance
Prevent abuse by throttling requests with configurable rate limits
Add a security layer to existing MCP tools without modifying their code

常见问题

What are the system requirements for Shield MCP?

Python 3.8 or higher and pip. Virtualenv is recommended for development.

Does Shield MCP modify the MCP SDK?

No. It works as a middleware layer that intercepts and secures tool calls without altering the official SDK.

What logging library does Shield MCP use?

It uses structlog for structured, production‑ready audit logging.

Can I use Shield MCP with the MCP Inspector?

Yes, Shield MCP is designed to be fully compatible with the MCP Inspector tool.

How do I define which tools are allowed?

Pass a set of allowed tool names to the `@secure_tool` decorator’s `allowed_tools` parameter. Only tools in that whitelist will be permitted.

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