MCP-PST-Server

PST MCP Server is a lightweight API bridge designed to connect MCP Clients (e.g., Cherry Studio, Claude Desktop) to an API server, enabling command execution on a Windows terminal. This allows AI Agents or AI Clients to seamlessly invoke various penetration testing tools within the Windows environment, achieving AI-assisted penetration testing.

This enables AI to run terminal tools like nmap, ehole, and others, interact with web applications using tools like curl, gobuster, solve CTF web challenges in real-time, and assist in solving machines from HTB or THM.

Directory Structure

• pst_server.py: Windows API Server (Endpoints: /api/tools/<tool>, /api/command, /health)

• mcp_server.py: MCP Client, encapsulates tools as MCP tools and forwards them to the API Server

🔍 Use Case

The goal is to enable AI-driven offensive security testing by:

• Letting the MCP interact with AI endpoints like OpenAI, Claude, DeepSeek, or any other models.

• Exposing an API to execute commands on a Windows machine.

• Using AI to suggest and run terminal commands to solve CTF challenges or automate penetration testing tasks.

• Allowing MCP apps to send custom requests (e.g., curl, nmap, ehole, etc.) and receive structured outputs.

🚀 Features

• 🧠 AI Endpoint Integration: Connect your Windows machine to any MCP of your liking such as Claude Desktop or Cherry-Studio.

• 🖥️ Command Execution API: Exposes a controlled API to execute terminal commands on your Windows machine.

• 🕸️ Web Challenge Support: AI can interact with websites and APIs, capture flags via curl and any other tool AI needs.

• 🔐 Designed for Offensive Security Professionals: Ideal for red teamers, bug bounty hunters, or CTF players automating common tasks.

• 📊 Automated Wordlist Management: Automatically generate and manage security testing wordlists (passwords, admin accounts, API endpoints).

• 🗂️ Temporary File Management: Automatic management of temporary files created during security testing.

• 📈 Performance Monitoring: Built-in performance monitoring and detailed logging for all operations.

• 🔄 Error Handling & Retry Mechanisms: Robust error handling with automatic retry capabilities.

• 🌐 Multiple Transport Modes: Support for stdio, SSE, and HTTP transport modes.

• 📚 Comprehensive Documentation: Detailed user guides, API references, and integration examples.

🛠️ Installation

On Pentest-Windows Machine (Will act as PST Server)

git clone https://github.com/arch3rPro/MCP-PST-Server.git
cd MCP-PST-Server
pip install -r requirements.txt
python3 pst_server.py

On your MCP Client (You can run on Windows or Linux)

• You will want to run python3 /absolute/path/to/mcp_server.py http://WINDOWS_IP:5100

Configuration for Claude Desktop:

Edit claude_desktop_config.json

{
    "mcpServers": {
        "pst_mcp": {
            "command": "python3",
            "args": [
                "/absolute/path/to/mcp_server.py",
                "--server",
                "http://WINDOWS_IP:5100/"
            ]
        }
    }
}

Configuration for Cherry Studio:

{
    "mcpServers": {
        "PST-MCP": {
            "name": "pst_mcp",
            "type": "stdio",
            "isActive": true,
            "command": "python3",
            "args": [
                "/absolute/path/to/mcp_server.py",
                "--server",
                "http://localhost:5100"
            ]
        }
    }
}

Installing Common Penetration Testing Tools (using Scoop and PST-Bucket)

1. Install Scoop: https://scoop.sh/

2. Add PST-Bucket:

   • scoop bucket add ar https://github.com/arch3rPro/PST-Bucket

3. Install tools (examples, streamline/expand as needed):

   • scoop install nmap httpx ffuf feroxbuster fscan hydra hackbrowserdata

   • scoop install subfinder dnsx naabu nuclei katana bbot

   • scoop install masscan nikto gobuster john ehole

   • scoop install metasploit (if not available, refer to official installer)

   • Optional: pip install sqlmap

   • Netcat: Use ncat (installed with nmap), or nc (optional)

Recommendation: Use Pentest-Windows Environment Image (with many tools): https://github.com/arch3rPro/Pentest-Windows

Starting the API Server

The PST API Server supports various command-line options for configuration:

Command Line Options

python pst_server.py [options]

• --host HOST: Server host address (default: 0.0.0.0)

• --port PORT: Server port number (default: 5100)

• --timeout SECONDS: Command execution timeout in seconds (default: 180)

• --debug: Enable debug mode for detailed logging

Starting the API Server with custom options

• Navigate to directory: /absolute/path/to/MCP-PST-Server

• Start with default settings:

  • python pst_server.py

• Start with custom settings:

  • python pst_server.py --host 0.0.0.0 --port 5100 --timeout 300 --debug

• Health Check (PowerShell):

  • Invoke-RestMethod -Uri http://localhost:5100/health -Method GET

Starting the MCP Server with custom options

The MCP Server supports multiple transport modes and can be configured with various parameters:

Transport Modes

1. STDIO Mode (Default): Standard input/output communication, ideal for most MCP clients like Claude Desktop

2. SSE Mode: Server-Sent Events transport, useful for web-based clients

3. HTTP Mode: Direct HTTP API access, suitable for custom integrations

Command Line Options

python mcp_server.py [options]

• --server URL: PST API server URL (default: http://localhost:5100)

• --timeout SECONDS: Request timeout in seconds (default: 300)

• --host HOST: MCP server host (default: 127.0.0.1)

• --port PORT: MCP server port (default: 8000)

• --path PATH: MCP server access path for stdio mode (default: /mcp)

• --transport MODE: Transport mode - studio (stdio), sse, or http (default: studio)

• --debug: Enable debug logging

Starting the MCP Server

• STDIO Mode (Default):

  python3 mcp_server.py --server http://localhost:5100 --debug

• SSE Mode:

  python3 mcp_server.py --server http://localhost:5100 --transport sse --host 0.0.0.0 --port 8000 --path /sse

• HTTP Mode:

  python3 mcp_server.py --server http://localhost:5100 --transport http --host 0.0.0.0 --port 8000 --path /mcp

Configuration for Custom Integrations (HTTP Mode):

• Nmap:

  $body = @{ target="scanme.nmap.org"; scan_type="-sV"; ports=""; additional_args="-T4 -Pn" } | ConvertTo-Json
  Invoke-RestMethod -Uri http://localhost:5100/api/tools/nmap -Method POST -Body $body -ContentType "application/json"

• FFUF:

  $body = @{ url="http://target"; wordlist="C:\wordlists\common.txt"; additional_args="" } | ConvertTo-Json
  Invoke-RestMethod -Uri http://localhost:5100/api/tools/ffuf -Method POST -Body $body -ContentType "application/json"

• ProjectDiscovery:

  # Subfinder
  $body = @{ domain="example.com"; list_file=""; additional_args="-all -silent" } | ConvertTo-Json
  Invoke-RestMethod -Uri http://localhost:5100/api/tools/subfinder -Method POST -Body $body -ContentType "application/json"
  
  # DNSX
  $body = @{ domain="example.com"; list_file=""; additional_args="-a -resp -silent" } | ConvertTo-Json
  Invoke-RestMethod -Uri http://localhost:5100/api/tools/dnsx -Method POST -Body $body -ContentType "application/json"
  
  # Naabu
  $body = @{ host="example.com"; list_file=""; ports=""; additional_args="-silent" } | ConvertTo-Json
  Invoke-RestMethod -Uri http://localhost:5100/api/tools/naabu -Method POST -Body $body -ContentType "application/json"
  
  # Nuclei
  $body = @{ target="http://example.com"; list_file=""; template=""; tags=""; severity=""; additional_args="-silent" } | ConvertTo-Json
  Invoke-RestMethod -Uri http://localhost:5100/api/tools/nuclei -Method POST -Body $body -ContentType "application/json"
  
  # Katana
  $body = @{ url="http://example.com"; list_file=""; depth="3"; additional_args="-silent" } | ConvertTo-Json
  Invoke-RestMethod -Uri http://localhost:5100/api/tools/katana -Method POST -Body $body -ContentType "application/json"

• Afrog:

  $body = @{ target="http://example.com"; list_file=""; pocs=""; additional_args="" } | ConvertTo-Json
  Invoke-RestMethod -Uri http://localhost:5100/api/tools/afrog -Method POST -Body $body -ContentType "application/json"

• Ehole (Fingerprinting):

  $body = @{ target="http://example.com"; list_file=""; fingerprints=""; output=""; additional_args="" } | ConvertTo-Json
  Invoke-RestMethod -Uri http://localhost:5100/api/tools/ehole -Method POST -Body $body -ContentType "application/json"

• Nikto:

  $body = @{ target="http://example.com"; port=""; ssl=$false; additional_args="" } | ConvertTo-Json
  Invoke-RestMethod -Uri http://localhost:5100/api/tools/nikto -Method POST -Body $body -ContentType "application/json"

• Gobuster (Directory Mode):

  $body = @{ mode="dir"; url="http://example.com"; wordlist="C:\wordlists\common.txt"; additional_args="" } | ConvertTo-Json
  Invoke-RestMethod -Uri http://localhost:5100/api/tools/gobuster -Method POST -Body $body -ContentType "application/json"

• Masscan:

  $body = @{ target="192.168.1.0/24"; ports="80,443"; rate="1000"; iface=""; additional_args="" } | ConvertTo-Json
  Invoke-RestMethod -Uri http://localhost:5100/api/tools/masscan -Method POST -Body $body -ContentType "application/json"

• John (Cracking Example):

  $body = @{ hash_file="C:\hashes\passwd.txt"; wordlist="C:\wordlists\rockyou.txt"; format=""; mask=""; rules=$false; additional_args="" } | ConvertTo-Json
  Invoke-RestMethod -Uri http://localhost:5100/api/tools/john -Method POST -Body $body -ContentType "application/json"

• Metasploit (msfconsole -x):

  $body = @{ msf_cmd="version; exit"; rc_file=""; additional_args="" } | ConvertTo-Json
  Invoke-RestMethod -Uri http://localhost:5100/api/tools/metasploit -Method POST -Body $body -ContentType "application/json"

• Netcat:

  # Listen
  $body = @{ mode="listen"; listen_port="4444"; additional_args="" } | ConvertTo-Json
  Invoke-RestMethod -Uri http://localhost:5100/api/tools/netcat -Method POST -Body $body -ContentType "application/json"
  # Connect
  $body = @{ mode="client"; host="127.0.0.1"; port="4444"; additional_args="" } | ConvertTo-Json
  Invoke-RestMethod -Uri http://localhost:5100/api/tools/netcat -Method POST -Body $body -ContentType "application/json"

• BBOT (Recursive Internet Scanner):

  # Using preset
  $body = @{ target="example.com"; preset="web-basic"; additional_args="" } | ConvertTo-Json
  Invoke-RestMethod -Uri http://localhost:5100/api/tools/bbot -Method POST -Body $body -ContentType "application/json"
  
  # Using specific modules
  $body = @{ target="example.com"; modules="subfinder-enum,dnsx-resolve,nmap-portscan"; additional_args="" } | ConvertTo-Json
  Invoke-RestMethod -Uri http://localhost:5100/api/tools/bbot -Method POST -Body $body -ContentType "application/json"
  
  # With output directory
  $body = @{ target="example.com"; preset="cloud-enum"; output_dir="C:\bbot_output"; additional_args="" } | ConvertTo-Json
  Invoke-RestMethod -Uri http://localhost:5100/api/tools/bbot -Method POST -Body $body -ContentType "application/json"

• General Command:

  $body = @{ command="whoami" } | ConvertTo-Json
  Invoke-RestMethod -Uri http://localhost:5100/api/command -Method POST -Body $body -ContentType "application/json"

Security Notes

• Use all tools and features only within legally authorized scopes.

• All command parameters are passed directly to the underlying tools; exercise caution with input to avoid injection and unintended operations.

• Execution timeout defaults to 180s and can be adjusted via --timeout at startup.

Iteration Plan

• Add more endpoints based on the tool list in PST-Bucket (e.g., afrog, ehole, fscan, etc.).

• Enhance parameter validation and output parsing for each tool to improve stability and readability.

• Implement advanced workflow orchestration for complex security testing scenarios.

• Add support for custom tool definitions and user-defined workflows.

• Develop web-based management interface for monitoring and configuration.

⚠️ Disclaimer:

This project is intended solely for educational and ethical testing purposes. Any misuse of the information or tools provided — including unauthorized access, exploitation, or malicious activity — is strictly prohibited. The author assumes no responsibility for misuse.