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Security

mcp-guard

io.github.diegoperezg7/mcp-guard-scan ยท v1.1.1

Security scanner for MCP servers: tool poisoning, shadowing, permissions, secrets, transport.

Source code Set it up

Connect Runs on your machine

Terminal
claude mcp add mcp-guard-scan -e MCP_GUARD_ALLOW_STDIO=<MCP_GUARD_ALLOW_STDIO> -e MCP_GUARD_ALLOW_PRIVATE_NETWORK=<MCP_GUARD_ALLOW_PRIVATE_NETWORK> -e LOG_LEVEL=<LOG_LEVEL> -- npx -y [email protected]
claude_desktop_config.json
{
  "mcpServers": {
    "mcp-guard-scan": {
      "command": "npx",
      "args": [
        "-y",
        "[email protected]"
      ],
      "env": {
        "MCP_GUARD_ALLOW_STDIO": "<MCP_GUARD_ALLOW_STDIO>",
        "MCP_GUARD_ALLOW_PRIVATE_NETWORK": "<MCP_GUARD_ALLOW_PRIVATE_NETWORK>",
        "LOG_LEVEL": "<LOG_LEVEL>"
      }
    }
  }
}
~/.cursor/mcp.json
{
  "mcpServers": {
    "mcp-guard-scan": {
      "command": "npx",
      "args": [
        "-y",
        "[email protected]"
      ],
      "env": {
        "MCP_GUARD_ALLOW_STDIO": "<MCP_GUARD_ALLOW_STDIO>",
        "MCP_GUARD_ALLOW_PRIVATE_NETWORK": "<MCP_GUARD_ALLOW_PRIVATE_NETWORK>",
        "LOG_LEVEL": "<LOG_LEVEL>"
      }
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "mcp-guard-scan": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "[email protected]"
      ],
      "env": {
        "MCP_GUARD_ALLOW_STDIO": "<MCP_GUARD_ALLOW_STDIO>",
        "MCP_GUARD_ALLOW_PRIVATE_NETWORK": "<MCP_GUARD_ALLOW_PRIVATE_NETWORK>",
        "LOG_LEVEL": "<LOG_LEVEL>"
      }
    }
  }
}

Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.

Tools

This server runs locally, so its tools are listed by your MCP client once it starts.

Environment variables

NameDescription
MCP_GUARD_ALLOW_STDIO
Optional		Set to 1 to add scan_stdio_server, which starts the command it is given
MCP_GUARD_ALLOW_PRIVATE_NETWORK
Optional		Set to 1 to let scan_server reach local and private addresses, over http too
LOG_LEVEL
Optional		pino log level; logs go to stderr

Details

Package[email protected] (NPM, stdio)
First published4 Nov 2026
Last updated4 Nov 2026
Registry nameio.github.diegoperezg7/mcp-guard-scan

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