In development — request access Onshape account Cloud-native CAD

Onshape
MCP Server

Connect Claude, ChatGPT, Gemini, Perplexity & Grok (respective accounts needed separately) to Onshape cloud-native CAD. Browse documents and workspaces, read part geometry and mass properties, query assembly structure and BOM, and export STEP/IGES — all inside your AI session.

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AuthOnshape account · minimal setup
SurfaceDocuments · parts · assemblies · mass props · STEP/IGES export
Quota protectionBest-effort reduction of repeat calls to help teams stay under Onshape's annual API limit
The quota problem — and how ForgeMCP helps

Onshape's annual API limit is tight

Onshape meters API calls per user per year: 5,000 calls/user on Professional, 10,000 on Enterprise/GOV — pooled at the company level, with a hard stop when you hit the ceiling. Teams that connect Claude directly to Onshape burn through that quota fast with repeated queries of the same models.

ForgeMCP is designed to make efficient use of the Onshape API and provides best efforts to help teams stay within their annual quota. Actual usage depends on how your team works; ForgeMCP does not guarantee that a team will remain under the limit.

Planned tool reference

Onshape MCP tools

onshape_documents_list
Browse documents in your Onshape workspace — name, owner, last modified date, and element count.
onshape_parts_list
List parts in a Part Studio with their names, material assignments, and part numbers.
onshape_mass_properties
Compute mass, volume, surface area, and center of mass for a part or assembly.
onshape_assembly_bom
Extract the structured BOM from an Onshape assembly with quantities, part numbers, and descriptions.
onshape_feature_list
Read the Part Studio feature tree — feature names, types, suppression state, and key parameters.
onshape_export_step
Export a part or assembly to STEP or IGES neutral format.
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Join the Onshape MCP waitlist
Development is in progress. Waitlist members get early access and priority onboarding support. We'll walk through connecting your Onshape account and configuring ForgeMCP for your team's workflow.

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Use cases

What Onshape MCP enables

📐
Design review
Browse Onshape documents, read the feature tree and part properties, and ask Claude to generate a design review checklist — without consuming multiple API calls on repeated queries.
📋
BOM documentation
Extract the Onshape assembly BOM and ask Claude to generate a procurement table, part description summaries, or a DFMEA entry via FlowGuideAI.
📊
Quota management
Teams on Onshape Professional (5,000 calls/user/yr) use ForgeMCP's best-effort API efficiency so AI-assisted sessions are less likely to exhaust the annual limit early.