Text2Sim MCP Server

Multi-paradigm Simulation Engine for LLM Integration

Text2Sim MCP Server is a simulation engine that supports multiple modeling paradigms, including Discrete-Event Simulation (DES) and System Dynamics (SD). It integrates with LLMs using the Model Context Protocol (MCP), enabling powerful simulation capabilities within natural language environments like Claude Desktop.

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🚀 Features

• Large Language Model (LLM) Integration
  Create simulation models using plain English descriptions to LLMs.

• Multi-Paradigm Support

  • Discrete-Event Simulation (DES) using SimPy for process-oriented models
  • System Dynamics (SD) using PySD for feedback-driven continuous models

• Multi-Domain Support
  Build simulations for domains such as airport operations, healthcare, manufacturing, supply chains, and more.

• Flexible Model Configuration

  • DES: Configurable entities with stochastic process logic
  • SD: Stock-and-flow models with feedback loops and time-based equations

• Real-Time Metrics

  • DES: Performance indicators such as wait times and throughput
  • SD: Time series data for stocks, flows, and auxiliaries

• Secure Implementation
  Uses regex-based parsing (not eval()) for processing distribution inputs and safe model execution.

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🔧 Installation

Prerequisites

• Python 3.12 or higher
• uv package manager

Install uv

On macOS and Linux:

curl -LsSf https://astral.sh/uv/install.sh | sh

On Windows (PowerShell):

powershell -ExecutionPolicy ByPass -c "irm https://astral.sh/uv/install.ps1 | iex"

Learn more: astral-sh/uv

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🛠️ Usage

Clone the repository

git clone https://github.com/IamCatoBot/text2sim-MCP-server.git

Integration with Claude Desktop

1. Open:

Claude > Settings > Developer > Edit Config > claude_desktop_config.json

2. Add the following block:

{
  "mcpServers": {
    "Text2Sim MCP Server": {
      "command": "uv",
      "args": [
        "--directory",
        "PATH_TO_TEXT2SIM_MCP_SERVER", 
        "run",
        "mcp_server.py"
      ],
      "env": {}
    }
  }
}

Note: If the uv command is not found, run which uv (Unix) or Get-Command uv (PowerShell) and use the full path in the "command" field.

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📚 API Reference

Overview

The MCP server provides tools for both Discrete-Event Simulation and System Dynamics modeling:

• Discrete-Event Simulation: Process-oriented modeling with SimPy
• System Dynamics: Stock-and-flow modeling with PySD

When using a Large Language Model (e.g. Claude) client, natural language prompts are translated into appropriate configurations via the Model Context Protocol (MCP).

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🏗️ Architecture

Text2Sim is structured into modular components:

• MCP Server – Handles natural language requests via MCP.
• Discrete-Event Simulation (DES) Module
  • Simulation Model – Core SimPy engine that executes process flows.
  • Entity Class – Represents units flowing through the system.
  • Process Steps – Encapsulate logic for each process stage.
  • Metrics Collector – Gathers statistics like wait times and throughput.
  • Secure Distribution Parser – Parses probability distributions safely.
• System Dynamics (SD) Module
  • Model Registry – Manages available SD models.
  • PySD Integration – Runs stock-and-flow models using PySD.
  • Simulation Controls – Time steps, durations, and parameter adjustments.
  • Results Formatter – Structures time series data for output.

For detailed documentation of each module, see:

• DES Module Documentation
• SD Module Documentation

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🔐 Security Considerations

• No eval() usage
  Regex-based parsing prevents arbitrary code execution.

• Input Validation
  Distribution types, parameters, and model configurations are validated before execution.

• Robust Error Handling
  Errors are reported cleanly without leaking internal state.

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🤝 Contributing

Pull requests are welcome! Please fork the repo and submit a PR. Suggestions, bug reports, and feature ideas are always appreciated.

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📄 License

This project is licensed under the MIT License. See the LICENSE file for details.