P

Plurigrid Juvix MCP Server

A secure MCP server implementation for executing controlled command-line operations, with comprehensive security features including command whitelists, path validation, and execution control.
2 points
19

What is the CLI MCP Server?

The CLI MCP Server is a secure command-line execution server that allows command-line operations to be run securely in a controlled environment. Through strict command whitelists, path validation, and execution control, it ensures system security while providing necessary command-line functionality.

How to use the CLI MCP Server?

You can set the allowed commands and directories by configuring environment variables, and then send requests to execute commands via the MCP protocol. The server will verify all requests to ensure they comply with security rules.

Use cases

Suitable for scenarios that require restricted command-line access for AI applications, such as automated script execution and restricted system management operations. It is particularly suitable for deployment in environments where a balance between functionality and security is needed.

Main features

Secure command executionEnsure that only authorized commands can be executed through a strict command and parameter whitelist mechanism
Configurable whitelistAllow administrators to flexibly configure the allowed commands and parameters, or set it to allow all commands
Path protectionPrevent path traversal attacks and ensure that all operations are performed within the specified directory
Execution timeout controlSet the command execution timeout to prevent long-running commands from occupying resources

Advantages and limitations

Advantages
Provide fine-grained command execution control
Prevent common security threats such as command injection and path traversal
Flexible configuration options to meet different security requirements
Detailed error reports to help quickly locate problems
Limitations
Does not support Shell operators (e.g., &&, |, etc.)
Requires pre-configuration of allowed commands and parameters
The execution environment is restricted and cannot access all system resources

How to use

Install the server
Automatically install the CLI MCP Server using the Smithery tool
Configure environment variables
Set security rules such as allowed directories, commands, and parameters
Start the server
Start the MCP server using the uv or uvx command
Send an execution request
Send a command execution request via the MCP protocol

Usage examples

View directory contentsSecurely list the files and subdirectories in the specified directory
View file contentsRead and return the contents of the specified file
Check the current working directoryConfirm the current directory where the command is executed

Frequently Asked Questions

Why did my command execution fail?
How to allow more commands?
Does the server support pipeline operations?
How to debug server issues?

Related resources

MCP Protocol Documentation
Official documentation for the Model Context Protocol
Smithery Registration
Register and manage your MCP server
MCP Inspector
MCP server debugging tool
Example Configuration
Example configuration for the CLI MCP Server
Installation
Copy the following command to your Client for configuration
{
  "mcpServers": {
    "cli-mcp-server": {
      "command": "uv",
      "args": [
        "--directory",
        "<path/to/the/repo>/cli-mcp-server",
        "run",
        "cli-mcp-server"
      ],
      "env": {
        "ALLOWED_DIR": "</your/desired/dir>",
        "ALLOWED_COMMANDS": "ls,cat,pwd,echo",
        "ALLOWED_FLAGS": "-l,-a,--help,--version",
        "MAX_COMMAND_LENGTH": "1024",
        "COMMAND_TIMEOUT": "30"
      }
    }
  }
}

{
  "mcpServers": {
    "cli-mcp-server": {
      "command": "uvx",
      "args": [
        "cli-mcp-server"
      ],
      "env": {
        "ALLOWED_DIR": "</your/desired/dir>",
        "ALLOWED_COMMANDS": "ls,cat,pwd,echo",
        "ALLOWED_FLAGS": "-l,-a,--help,--version",
        "MAX_COMMAND_LENGTH": "1024",
        "COMMAND_TIMEOUT": "30"
      }
    }
  }
}
Note: Your key is sensitive information, do not share it with anyone.
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