cloudCAD-copilot
Demo AI assistant for Onshape that detects fastener holes from real assembly geometry and batch-inserts standard parts.
What it does and how it connects
CloudCAD-Copilot is a proof-of-concept agent that automates standard part assembly on Onshape through natural language. It combines LLMs for intent extraction and reasoning with a knowledge graph of the real assembly, to identify, select, and insert standard parts such as ISO screws into the correct locations.
One command box handles three kinds of requests: inserting a standard part, checking which parts are missing material or standard data, and checking the impact of a standards change across connected parts. Hole detection measures hole features directly from real CAD geometry, telling dowel-pin holes of about 8 mm apart from screw-clearance holes of about 9 mm by measured diameter, and the fastener recommendation is grounded in the part's real material and standards.
The README marks the status as Prototype Complete and says the integration is connected end to end to the real Onshape API with no mock data. A React web interface takes commands and shows results, and the demo inserts ISO 4762 M8 by 65 mm screws into detected holes on a top die shoe.
Alternatives
Compare side by side- Jarvis Onshape MCP
A Claude Code plugin for driving real Onshape CAD with vision-based decomposition and parametric iteration.
- onshape-mcp (gpambrozio)
An Onshape MCP server with 93 tools for sketching, solid features, assemblies, drawings, and export, with zero-config browser sign-in.
- onshape-mcp (altendky)
A self-hosted MCP server that gives AI assistants read and write access to Onshape documents through user-owned API credentials.
- fusion360-mcp-server
An MCP server that connects AI coding agents to Fusion 360 through an in-Fusion add-in bridge.
- freecad-ai
A FreeCAD workbench with a chat interface that builds and edits 3D models from natural language through 50 structured tools and 24 LLM providers.
Recurring errors it addresses
Error Index entries this tool is built to reduce or work around.
- Drawing toolset is described as missing basic drafting capabilities and mark-up controls.Error Index
- Large-assembly handling and richer 3D communication workflows are described as limited compared with expectations.Error Index
- Onshape-exported URDF had a camera frame flipped 180 degrees and forearm roll axes 11.0 and 10.7 degrees off; editing the URDF is pointless because the export overwrites it, so a load-time correction table patches the model in memory.Error Index
- Onshape's URDF export puts a roll of -pi on the lidar joint, mirroring every scan, while the link's visual origin carries a compensating +pi so the model looks right in RViz and only the laser scan is wrong.Error Index
- A fillet fails with "both faces next to the edge must be planar" on a part the user built easily in Onshape.Error Index
Sources
Not verified
- License: the GitHub API returns no license and no license file was found, so no license is stated.
- No GitHub releases exist, so latest release fields are null.
- No independent user voice found: the repository has no public issues.
- Pricing: none stated on the repo.
- A named individual builder beyond the repository owner handle Yingying Zhuang
Last verified November 6, 2026. Listings are informational. The evidence score measures public, verifiable evidence and is not an endorsement or a compatibility claim.