What is MCP Tools Demo Install Guide GitHub
Open Source · MIT License

Give your AI
injection molding
expertise

MoldSim MCP connects AI assistants to a specialized knowledge base of materials, process parameters, DFM rules, and simulation best practices.

Get Started View on GitHub
Click to copy $ npx moldsim-mcp
// Protocol

What is MCP?

Model Context Protocol is the open standard that lets AI assistants use external tools and knowledge sources.

Claude / ChatGPT / AI Assistant
↓ request  ↑ response
Model Context Protocol (MCP)
↓ query  ↑ data
{MoldSim} — Injection Molding Knowledge

A brain extension for your AI

MCP (Model Context Protocol) is an open standard created by Anthropic. It allows AI assistants to connect to external servers that provide specialized tools and knowledge.

Think of it as a USB port for AI — plug in a server, and the AI instantly gains new capabilities. MoldSim MCP plugs in 20+ years of injection molding expertise: material data, simulation knowledge, process validation, and DFM rules.

Your AI goes from generic to domain expert.

// Capabilities

Four powerful tools

Each tool gives your AI a specific superpower for injection molding simulation work.

query_simulation_knowledge

Knowledge Base

Ask anything about injection molding simulation. Defect troubleshooting, DFM rules, mesh strategies, and process optimization — all backed by semantic search over expert knowledge.

warpage sink marks short shots weld lines flash DFM meshing
get_material_properties

Material Database

Instant access to 20+ engineering plastics with full property sets. Cross-WLF viscosity models, Tait PVT data, thermal & mechanical properties, and recommended processing windows.

Cross-WLF PVT thermal mechanical processing
validate_process_parameters

Process Validator

Validate your melt/mold temperatures, injection speed, packing pressure, and cooling time against material specs. Get instant warnings, errors, and actionable suggestions.

melt temp mold temp pressure cooling shear rate
generate_simulation_spec

Simulation Spec Generator

Describe your part in plain English and get a complete simulation specification: recommended analysis types, mesh settings, process conditions, and expected results checklist.

fill analysis mesh settings runner design cooling layout
20+ engineering plastics included
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 PPE/PS 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 PPE/PS
// In action

See it work

A real conversation between an engineer and an AI with MoldSim MCP connected.

claude — moldsim-mcp
You
My PA66-GF30 connector housing is warping badly after ejection. Wall thickness is 2mm, melt temp 290°C, mold temp 80°C. What should I check?
Claude + MoldSim
query_simulation_knowledge
Several factors are likely contributing to warpage in your glass-filled PA66 part:

1. Fiber orientation imbalance — GF30 materials are highly anisotropic. Shrinkage along flow can be 0.3% while cross-flow reaches 1.2%. This differential drives warpage.

2. Mold temperature is low — For PA66-GF30, recommended mold temp is 85–100°C. Your 80°C may cause uneven crystallization. Try 90°C.

3. Cooling asymmetry — Check that cooling channels are symmetric on both halves. Even a 5°C difference across the part can cause measurable bow.

4. Packing phase — Insufficient packing allows voids that amplify differential shrinkage. Ensure V/P switchover at 95% fill with adequate hold time.
// Setup

Install in 30 seconds

Works with Claude Code CLI and Claude Desktop. No API keys, no accounts, no config files.

Claude Code

CLI tool
1

Add the MCP server

One command registers MoldSim with Claude Code:

$ claude mcp add moldsim -- npx -y moldsim-mcp
2

Start using it

That's it. Ask Claude about injection molding — it will automatically use MoldSim tools.

$ claude "What causes sink marks in PC parts?"

Claude Desktop

Desktop app
1

Open settings

Go to Settings → Developer → Edit Config and add:

"mcpServers": { "moldsim": { "command": "npx", "args": ["-y", "moldsim-mcp"] } }
2

Restart Claude Desktop

Restart the app. You'll see MoldSim tools appear in the tools menu.

// Beginner Guide

New to Claude Code?

Claude Code is an AI coding assistant that runs in your terminal. It can read files, write code, run commands, and — with MCP servers like MoldSim — access specialized domain knowledge. Here's how to get everything running from scratch.

Install Node.js

MoldSim MCP runs on Node.js (v18+). If you don't have it yet:

Download from https://nodejs.org # LTS version recommended

Or via terminal on macOS/Linux:

$ curl -fsSL https://fnm.vercel.app/install | bash && fnm install --lts

Install Claude Code

Claude Code is Anthropic's official CLI. Install it globally:

$ npm install -g @anthropic-ai/claude-code

Then launch it once to log in:

$ claude
i Claude Code requires an Anthropic API key or a Claude Max subscription. It will guide you through authentication on first launch.

Add MoldSim MCP

Register MoldSim as an MCP server — one command, no config files:

$ claude mcp add moldsim -- npx -y moldsim-mcp
i This downloads and registers MoldSim automatically. On first run it will build a local vector database — takes about 30 seconds, then it's instant.

Start asking questions

That's it! Open Claude Code and ask about injection molding:

$ claude "What causes warpage in glass-filled nylon parts?"
$ claude "Give me the Cross-WLF parameters for PC/ABS"
$ claude "Validate: ABS at 245C melt, 60C mold, 2.5mm wall"
// Trusted by industry leaders

Used by engineering teams at

// Why MoldSim

Built for real engineers

Open Source

MIT licensed. Inspect the code, fork it, contribute. Full transparency on every material property and knowledge entry.

Works Offline

Local vector database with embedded knowledge. No cloud dependency, no API keys. Your data stays on your machine.

Real Engineering Data

20+ materials with Cross-WLF viscosity, Tait PVT, thermal and mechanical properties. Not toy data — real simulation-grade values.

Software Agnostic

Covers Moldflow, Moldex3D, and Cadmould workflows. General simulation knowledge that applies regardless of your software.

Zero Config

One command to install. No API keys, no accounts, no config files. Works out of the box with Claude Code and Claude Desktop.

By Engineers, For Engineers

Built by people who run simulations daily. Knowledge curated from real production experience, not just textbooks.

Ready to supercharge your
simulation workflow?

Install MoldSim MCP and turn your AI assistant into an injection molding expert. Free, open source, forever.

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