AI-to-CATIA MCP — Community Beta RC2

AI-to-CATIA MCP Community Beta is a runnable, safety-scoped CATIA V5 MCP server. It lets users see an AI create a small parametric CATPart instead of exposing only isolated surface commands.

This RC1 contains exactly 36 MCP tools:

• 4 package/capability tools;

• 4 CATIA connection and read-only document tools;

• 6 guarded Demo CATPart and transaction tools;

• 6 inspection and measurement tools;

• 2 Sketch tools;

• 6 Part Design tools;

• 8 GSD/Surface tools.

The generic CATIA adapters are selected from the Codex development mirror associated with the V0.8.9 architecture. The company-local field-CLOSED tree is not distributed and byte identity is not claimed. The public entrypoint, 36-tool composition, Demo guard, and minimal public Surface adapter are therefore marked PACKAGED_FIELD_REQUIRED until this exact package passes the Community validation plan on R26.

Safety boundary

Every write tool requires all of the following:

1. a server-side operator token;

2. a CATPart created by catia_demo_new_part in the current server process;

3. the matching hidden Community scope marker in the active document;

4. an explicit active transaction.

The package does not expose opening an existing CATPart, arbitrary save/overwrite, document deletion, macro execution, or mutation of an existing user document. A Demo CATPart can only be saved to a fresh, non-existing .CATPart path after its transaction is committed.

See Quickstart, Safety model, and R26 validation plan.

Related MCP server: fcgen-mcp

A visible first demo

Ask the MCP client to perform this sequence:

Connect to CATIA. Create a new Community demo part named CommunityBracket.
Begin a transaction, create a centered 120 mm x 80 mm rectangle sketch on XY,
pad it 20 mm, inspect the part, then commit. Save it to a new path that does not exist.
Do not touch any document that was already open.

This demonstrates the intended flow: intent → typed MCP tools → sketch → parametric Part Design feature → inspection → explicit commit. See demo prompts for a GSD example too.

Not included

• Door BIW, sealing, or vehicle engineering knowledge;

• production Reference DB, migrations, evidence ledgers, or field logs;

• company-local FULL_SOURCE or local adaptations;

• arbitrary CATIA automation or an unrestricted general-purpose write server.

Those are intentionally separate commercial extensions. The public package is independently usable for generic CATIA demonstrations and community evaluation.

Installation

Requirements: Windows, Python 3.10+, a properly licensed CATIA V5 installation, and permission to use its Automation/COM interface.

py -m venv .venv
.\.venv\Scripts\Activate.ps1
python -m pip install -e .
$env:AI_TO_CATIA_COMMUNITY_OPERATOR_TOKEN = "replace-with-a-local-secret"
python -m catia_mcp

Never commit the operator token. The project is independent and is not affiliated with or endorsed by Dassault Systèmes.

Status and support

Release status: 0.2.0-community-beta-rc2 / PACKAGED_FIELD_REQUIRED.

Offline tests and inherited field evidence do not replace a real tools/list, tools/call, and CATIA R26 test of this exact public composition. Consult the validation report shipped beside the ZIP before use.

Use GitHub Issues for reproducible bugs, CATIA R26 field reports, and scoped feature requests. Never attach proprietary CATParts, operator tokens, internal paths, or production engineering data. Use private security reporting for approval bypasses, unsafe mutation paths, and secret exposure; use Discussions for general questions and demo ideas.

Licensed under Apache License 2.0.