onshape-mcp (hedless)
MCP server with 45 tools for programmatic CAD modeling in Onshape, covering documents, sketches, features, assemblies and mates, variable tables, FeatureScript evaluation, and STEP and STL export via the Onshape REST API.
What it does and how it connects
onshape-mcp is an enhanced MCP server for programmatic CAD modeling with Onshape, providing comprehensive access to the Onshape REST API. It exposes 45 tools covering document discovery, parametric sketches, feature management (extrude, revolve, thicken, fillet, chamfer, boolean, pattern), assembly management and mates (fastened, slider, revolute, cylindrical), assembly analysis, variable tables, FeatureScript evaluation, and export.
Export covers Part Studios and Assemblies to STL, STEP, PARASOLID, GLTF, and OBJ. The server runs as a Python package with a console entry point, and setup needs an Onshape account with API access plus an access key and secret key from the Onshape Developer Portal, supplied as environment variables or a .env file.
The README documents Claude Code configuration and a quick start that asks Claude Code to list Onshape documents. The latest release is v0.4.0 from September 10, 2026, and the last push recorded is the same date, so the project looks quiet since that release.
Alternatives
Compare side by side- Onshape FeatureScript MCP Server (PTC)
PTC official MCP server in Onshape that connects coding LLMs to FeatureScript to build reusable custom features, rather than an open source server over the REST API.
- fusion-cad-mcp
An open source typed MCP tool surface over Autodesk Fusion, rather than an MCP server over the Onshape REST API.
- inventor-mcp (NeonGlay)
An open source MCP server for parametric modeling in Autodesk Inventor, rather than an MCP server for Onshape.
- MecAgent
A commercial desktop copilot that acts inside an open SolidWorks session, rather than an open source MCP server for Onshape.
- AnkusDrive
An open source CLI and MCP server that drives FreeCAD, rather than an MCP server for Onshape.
Recurring errors it addresses
Error Index entries this tool is built to reduce or work around.
Sources
Not verified
- Pricing: none stated on the repo. Onshape API access itself sits behind an Onshape account, which the README does not price.
- No independent user voice found: recent repo activity is maintainer and contributor pull requests only.
- Activity: last push September 2026, so the project looks quiet since the v0.4.0 release.
- Related Error Index entries for this specific server (the onshape-mcp gpambrozio entries describe a different repo, so they are not attached)
Last verified November 6, 2026. Listings are informational. The evidence score measures public, verifiable evidence and is not an endorsement or a compatibility claim.