inventor-mcp-server

Maintained continuation of NeonGlay/inventor-mcp. The original repository has had no activity since its initial release (June 2026), and fresh installs there fail on MCP SDK 2.x. This repo carries the full original history plus the fixes and features that were submitted upstream as PRs and never reviewed. If the original author returns, everything here is available to be merged back. See CHANGELOG.md.

MCP server for parametric 3D modeling in Autodesk Inventor — drive Inventor with Claude (or any MCP client) in natural language.

Build real parametric parts — flanges, shafts, nuts, brackets, sheet-metal enclosures — by talking to an AI assistant. The server wraps Inventor's COM API with high-level, millimeter-based tools and ships with battle-tested knowledge of Inventor 2026 API quirks that aren't documented anywhere else.

You:    "Build a DIN 934 M16 hex nut with proper conical chamfers"
Claude: creates sketch → hexagon → extrude → tapped M16×2 hole →
        revolve-cut chamfers → done. Fully parametric, dimensioned sketches.

Features

• 57 MCP tools: sketching, extrude/revolve, native hole features (drilled / tapped / counterbore), fillets, chamfers, circular patterns, sheet metal (named rules / Face / auto-mitered Flanges / Cut at world coordinates / Corner Round, with Flat Pattern support), parameters
• Assemblies with vendor parts: import_step (keeps the files in your project folder), placement with full orientation, check_interference / measure_distance, and sweep_rotation to check a door or lock moves freely through its whole range
• Assemblies (IAM): place components, ground them, constrain by origin geometry (mate / flush / angle) or drop a bolt into a hole with a single Insert constraint
• execute_python power tool — run arbitrary Python against the live COM connection with a persistent namespace (escape hatch for anything not covered by dedicated tools)
• Auto-reporting — every feature operation returns a volume/topology delta (Hole1 | V 23497 (-503 mm³) | F7 E14), so the AI can self-verify each step
• Transactions — wrap multi-step builds, roll back everything with one call
• Hot reload — edit the API wrapper and reload without restarting the MCP client
• Topology helpers — find edges/faces by coordinates instead of guessing indices
• Parametric discipline — projected origin points, symmetry constraints, dimensioned sketches that survive parameter changes

Requirements

• Windows with Autodesk Inventor (developed on Inventor 2026, also verified on Inventor 2027; older versions may need enum adjustments — see docs/inventor-api-notes.md)
• Python 3.12+
• pip install "mcp[cli]" pywin32 — MCP Python SDK 1.x and 2.x are both supported (2.x renamed FastMCP to MCPServer; the server detects which is installed)

Installation

1. Clone this repository:

   git clone https://github.com/cenitu/inventor-mcp-server.git
   

2. Install dependencies:

   pip install "mcp[cli]" pywin32
   

3. Register the server with your MCP client. For Claude Code, add to .mcp.json in your project root (see .mcp.json.example). Use th

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