VibeRPGSimulator

Official Onshape Labs MCP for writing and testing custom FeatureScript features.

How it works

Foe: Clay Golem, a model or part that isn't shaped yet.

Foes

  • Clay Golem

Party · Context

  • ArchitectYour agent100/100

  1. Clay Golem

    The Clay Golem blocks the way.

    What really happensIt stands for a model or part that isn't shaped yet.

    Architect: Context 100/100.

  2. Slump

    The unshaped clay slams down.

    What really happensA model or part takes pass after pass before it holds its shape.

    Architect takes 13. Architect: Context 87/100.

  3. Onshape Labs FeatureScript MCP

    The Onshape Orb opens a portal to the FeatureScript hall.

    What really happensClaude Code adds the HTTP server at https://fs-mcp.labs.onshape.app/mcp. You need an Onshape account and a subscription to the FeatureScript MCP app.

    Clay Golem takes 33.

  4. Onshape Labs FeatureScript MCP

    A browser gate asks you to approve the orb before it can enter.

    What really happensLaunch Claude, approve in the browser, then run /mcp and authenticate the Onshape account.

    Clay Golem takes 15.

  5. Slump

    The Clay Golem uses Slump.

    Architect takes 13. Architect: Context 74/100.

  6. Onshape Labs FeatureScript MCP

    The hero forges a Feature Studio inside the document you named.

    What really happensPaste an Onshape document URL and ask for a Feature Studio. The article's test is a studio named FS1 appearing in that document.

    Clay Golem takes 22.

  7. Onshape Labs FeatureScript MCP

    The Clay Golem drops a custom feature you can reuse on later parts.

    What really happensClaude can create, test, and refine FeatureScript features in natural language. No local CAD app is required. If tools vanish, authenticate again with /mcp.

    Clay Golem takes 30. Clay Golem falls.

  8. Victory

    The Clay Golem falls.

Learn this spell

Claude Code

claude mcp add --transport http onshape https://fs-mcp.labs.onshape.app/mcp

Notes

Needs an Onshape account, a subscription to the FeatureScript MCP Server app in the Onshape App Store, and a browser authorize step. The 2026-09-08 article documents Claude Code only: claude mcp add --transport http onshape https://fs-mcp.labs.onshape.app/mcp, then /mcp to authenticate. On Windows it also adds C:\Users\USERNAME\.local\bin to PATH. No local CAD app is required. If your organization has a company API allocation, you can ask Claude to use it instead of your own. Subscription price and a code license are not stated on that page.

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