PyMemSim-MCP

PyMemSim-MCP exposes PyMemSim membrane simulation capabilities through an MCP server.

Overview 🌐

PyMemSim-MCP is a next-generation framework that brings the Model Context Protocol into chemical engineering modeling and simulation, specifically for membrane-based separation systems.

Built on top of PyMemSim, this package introduces a model-source-driven architecture in which thermodynamic data, transport properties, and governing equations are defined externally in a structured, machine-readable format (e.g., YAML). These model sources are dynamically constructed using tools such as PyThermoLinkDB and PyThermoDB, and then supplied, alongside conventional inputs like temperature, pressure, and composition, to simulation workflows.

Unlike traditional tightly coupled simulation tools, PyMemSim-MCP decouples data, equations, and numerical solvers, enabling:

• ✅ Consistent and unit-safe thermodynamic definitions across simulations

• 🔗 Flexible integration with multiple modeling packages and workflows

• ⚙️ Solver-agnostic execution of mass and heat balance equations

• 🔍 Transparent and interpretable simulation pipelines

A key innovation of PyMemSim-MCP is its compatibility with agentic workflows, where specialized agents can:

• 🧠 Extract and structure thermodynamic data from unstructured sources into validated model sources

• 🤖 Interact with MCP-enabled endpoints to perform simulations, sensitivity analysis, and optimization

This approach addresses critical gaps in current LLM-integrated engineering tools, where inconsistencies in data formats, units, and equations often lead to unreliable results. By enforcing a unified scientific contract, PyMemSim-MCP allows LLMs to control both conventional inputs and structured model sources before executing physics-based computations, significantly improving robustness and reproducibility.

PyMemSim-MCP is particularly suited for:

• 🧪 Membrane process modeling (e.g., hollow fiber modules, gas separation)

• 🤝 AI-assisted simulation workflows

• 🚀 Rapid prototyping and validation of process models

• 🎓 Educational and research applications in computational chemical engineering

Overall, PyMemSim-MCP represents a step toward trustworthy AI-driven simulation environments, where domain knowledge, data, and numerical methods are seamlessly integrated under a standardized and extensible framework.

Related MCP server: AspenPlus MCP Server

Requirements 📋

• Python >=3.11

• pip (or uv)

Install the package 📦

pip install pymemsim-mcp

This installs the CLI entrypoint:

• pymemsim-mcp

Start / Activate the MCP Server ▶️

The server entrypoint is:

• module: python -m pymemsim_mcp.server

• script: pymemsim-mcp

Both support the same options.

Case A: STDIO transport (recommended for MCP desktop/agent clients) 🧵

pymemsim-mcp --mode stdio

Equivalent:

python -m pymemsim_mcp.server --mode stdio

Case B: HTTP transport (for network-accessible clients) 🌍

pymemsim-mcp --mode http --host 127.0.0.1 --port 8000 --path /mcp

Equivalent:

python -m pymemsim_mcp.server --mode http --host 127.0.0.1 --port 8000 --path /mcp

CLI Options ⌨️

• --mode: stdio or http (default: stdio)

• --host: HTTP bind host (default: 127.0.0.1)

• --port: HTTP bind port (default: 8000)

• --path: HTTP endpoint path (default: /mcp)

MCP Client Configuration Examples 🔌

STDIO client config (generic)

{
  "mcpServers": {
    "pymemsim": {
      "command": "pymemsim-mcp",
      "args": ["--mode", "stdio"]
    }
  }
}

HTTP client config (generic)

{
  "mcpServers": {
    "pymemsim": {
      "url": "http://127.0.0.1:8000/mcp"
    }
  }
}

Available Tool 🧩

• simulate_gas_hfm: build thermo model source from reference content and run gas hollow-fiber membrane simulation.

Agentic Workflows 🤖

For AI-assisted and agentic membrane-process simulation, see PyMemSim-Agent.

PyMemSim-Agent provides a harness-neutral instruction and workflow layer designed to orchestrate PyMemSim-MCP through AI agents such as Codex, Claude, Gemini, and other agentic environments.

While PyMemSim-MCP exposes the scientific simulation capabilities through the Model Context Protocol (MCP), PyMemSim-Agent provides the reasoning rules, skills, prompts, examples, and workflows needed for an agent to use those capabilities systematically.

Together, they enable agentic workflows in which an AI agent can:

• 🧠 Interpret a membrane-separation problem and identify the required simulation inputs

• 📚 Build structured thermodynamic model sources from reference data

• ✅ Validate required properties, units, equations, and simulation inputs

• 🔧 Select and invoke the appropriate PyMemSim-MCP tools

• ⚙️ Execute physics-based membrane simulations

• 📊 Interpret simulation outputs and engineering performance indicators

• 🔁 Perform iterative studies such as sensitivity analysis, operating-condition exploration, and optimization

• 🧪 Maintain a reproducible workflow connecting scientific references, model inputs, numerical simulation, and engineering interpretation

The overall architecture can therefore be viewed as:

User / Engineering Problem
          │
          ▼
   Agentic Harness
(Codex / Claude / Gemini / ...)
          │
          ▼
    PyMemSim-Agent
 Instructions • Skills
 Prompts • Workflows
          │
          ▼
     PyMemSim-MCP
      MCP Tools
          │
          ▼
       PyMemSim
Physics-Based Simulation
          │
          ▼
Engineering Results

👉 PyMemSim-Agent repository: https://github.com/sinagilassi/PyMemSim-Agent

Development Quick Check ✅

python -m py_compile pymemsim_mcp/server.py
python -m py_compile pymemsim_mcp/interface/gas_hfm.py

Troubleshooting 🩺

• pymemsim-mcp: command not found

  • Run pip install -e . in the active environment.

  • Confirm environment is activated.

• Port already in use (HTTP mode)

  • Change port, for example: --port 8010.

• Import errors

  • Reinstall dependencies: pip install -e ..

❓ FAQ

For any questions, contact me on LinkedIn.

📄 License

This project is licensed under the Apache License 2.0. See the LICENSE file for details.

👨‍💻 Authors

• @sinagilassi