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MoldSim MCP Server

Injection molding simulation guidance, material data, process validation, simulation specs, comparisons, and DFM checks over MCP.

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Install MoldSim MCP Server

Pick your client, then add it in one click or paste the config.

STDIONode.js
~/Library/Application Support/Claude/claude_desktop_config.json
claude_desktop_config.json
{
  "mcpServers": {
    "moldsim-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "moldsim-mcp"
      ]
    }
  }
}

Settings → Developer → Edit Config, merge this into mcpServers, then fully quit and reopen Claude Desktop.

We couldn’t confirm it starts correctly

We ran the install command but it didn't respond within our test window — this can mean a slow first-time install rather than a real problem.

npx -y moldsim-mcp

No response to initialize.

This is an experimental automated check and can have false negatives — missing environment variables, a slow cold install, etc. It doesn’t necessarily mean something’s wrong. Last checked 9d ago.

Overview

MoldSim MCP Server MCP server provides injection molding simulation knowledge and structured engineering checks through MCP tools. It queries a local knowledge base, returns properties for 21 included materials, validates process parameters, and generates simulation specifications or DFM checklists. Use it when an AI assistant needs guidance on defects, meshing, processing windows, material selection, or manufacturability. The server runs with Node.js and can be added to Claude Code or Claude Desktop through a standard stdio configuration.

Use cases

  • Check molding parameters against a material processing window
  • Compare candidate materials for thermal and mechanical differences
  • Generate a simulation plan from a part description
  • Investigate defects and choose mesh strategies
  • Run DFM checks on walls, ribs, draft, and related features

Key features

  • Injection molding simulation knowledge queries
  • Cross-WLF, Tait PVT, thermal, and mechanical material data
  • Process-window validation with warnings and suggestions
  • Natural-language simulation specification generation
  • Two-to-four-material comparisons
  • 15-plus-rule DFM checklists

Tools6

What MoldSim MCP Server lets your agent do. Expand a tool for its parameters.

Self-reported~226 tokens of context

Security & health

What it can reach and how reliably it runs — from our own checks, not the maintainer’s claims.

ActiveLast checked Today

Recent health check succeeded.

9/9 checks healthy over the last 46d

Supply-chain signal

No high-severity advisories surfaced by our automated scan.

Critical 0High 0Medium 0Low 0

Scanned 1d ago via OSV.dev · moldsim-mcp (npm)

Adoption & maintenance

Factual signals from GitHub, npm, and our automated checks — not a rating.

GitHub stars7Stargazers on the source repository.
npm downloads171Package downloads in the last 30 days.
Last commit7mo agoMost recent push to the default branch.
Install checkInconclusiveDidn't respond in our test window — often a slow first install.
Tools exposed6Callable tools this server registers over MCP.
Directory activity4 viewsConfig copies, upvotes, and views on AllMCPs.

How MoldSim MCP Server works

What MoldSim MCP Server MCP server does

MoldSim MCP Server MCP server gives MCP-compatible AI assistants access to injection molding simulation reference data and engineering checks. Its coverage includes material behavior, processing windows, common molding defects, mesh selection, cooling, process optimization, and design for manufacturability. The knowledge is software-agnostic and is intended to apply across Autodesk Moldflow, Moldex3D, CADMOULD, SIGMASOFT, and SolidWorks Plastics.

The material database includes 21 listed grades, including ABS, PP, PA6, PA66, PA66-GF30, PC, PC/ABS, POM, PBT, PET, TPU, ASA, and others. Returned data can include Cross-WLF viscosity parameters, Tait PVT data, thermal and mechanical properties, processing windows, and fiber-related effects where applicable.

How it works

The server exposes six MCP tools. Free-text questions go to a knowledge query tool for topics such as short shots, sink marks, warpage, weld lines, burn marks, jetting, splay, voids, flow marks, mesh strategies, cooling, and cycle time. Material lookups return structured property data, while process validation compares supplied values such as melt temperature and mold temperature with the selected material's processing range.

Natural-language part descriptions can be converted into a structured simulation specification. The result may recommend analysis stages such as Fill, Pack, Cool, and Warp, along with mesh approaches, process conditions, and expected outputs. Material comparison accepts two to four materials and reports differences in processing, thermal behavior, mechanical data, shrinkage, stiffness, or heat resistance. DFM analysis evaluates supplied part parameters with pass, warning, or fail results across more than 15 rules.

Setup and configuration

MoldSim MCP Server MCP server runs on Node.js and is distributed as an npm package. Claude Code can add it with claude mcp add moldsim -- npx -y moldsim-mcp. Claude Desktop uses an MCP configuration entry whose command is npx and whose argument is -y moldsim-mcp.

For a source installation, clone the repository, run npm install, build with npm run build, and point the MCP client to node dist/index.js. The implementation uses TypeScript, a local embedded Qdrant vector database, and HuggingFace transformers for embeddings. No environment variables are specified in the provided setup instructions.

Tools and capabilities

  • query_simulation_knowledge: Ask free-text questions about simulation, defects, DFM, meshing, or process optimization.
  • get_material_properties: Retrieve material, viscosity, PVT, thermal, mechanical, and processing data.
  • validate_process_parameters: Check process values against a material's processing window and return errors, warnings, and suggestions.
  • generate_simulation_spec: Convert a part description into recommended analyses, mesh guidance, conditions, and outputs.
  • compare_materials: Compare two to four materials side by side.
  • generate_dfm_checklist: Run more than 15 DFM checks against part inputs.

Limitations and notes

MoldSim MCP Server MCP server provides reference knowledge and rule-based checks rather than running Moldflow, Moldex3D, or another simulation package. Its material coverage is limited to the 21 grades included in the database. Results depend on the part details, material selection, and process parameters supplied to the tools.

Read the full README View source on GitHub

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Frequently Asked Questions about MoldSim MCP Server

MoldSim MCP Server is an MCP server that connects AI assistants to injection molding simulation knowledge and material data. Its main tools query defects and meshing guidance, retrieve properties, validate process parameters, generate simulation specifications, compare materials, and produce DFM checklists for supported molding inputs.

Install it with `npx -y moldsim-mcp` through an MCP client. Claude Code uses `claude mcp add moldsim -- npx -y moldsim-mcp`; Claude Desktop requires a configuration entry with `npx` as the command and `-y moldsim-mcp` as its argument. Source installation uses npm install and npm run build.

Yes, MoldSim MCP Server works with Claude Code through the documented stdio command. Add it with `claude mcp add moldsim -- npx -y moldsim-mcp`, then ask Claude about molding defects, materials, process validation, simulation planning, or DFM.

It supports 21 included materials and grades, including ABS, PP Homo, PP Copo, PA6, PA66, PA66-GF30, PC, PC/ABS, POM, HDPE, LDPE, PMMA, PBT, PBT-GF30, PET, PS, HIPS, TPU, SAN, ASA, and PPE/PS.

No direct simulation execution is documented. MoldSim MCP Server provides software-agnostic knowledge, material data, validation, simulation specifications, and DFM checks applicable to Moldflow, Moldex3D, CADMOULD, SIGMASOFT, and SolidWorks Plastics.

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