{"id":"hedless-onshape-mcp","name":"onshape-mcp","af_score":57.2,"security_score":59.0,"reliability_score":31.2,"what_it_does":"onshape-mcp is an MCP server that exposes a set of MCP tools for programmatic interaction with Onshape (document discovery, sketch/feature/assembly creation and analysis, variable table management, FeatureScript evaluation, and exporting CAD to common formats).","best_when":"You want an AI agent to drive Onshape modeling tasks (including parametric updates) using a structured toolset, and you can supply Onshape API credentials securely.","avoid_when":"You need a documented, stable REST/SDK contract with explicit rate-limit guidance, or you require formal guarantees on idempotency/retry semantics for write operations.","last_evaluated":"2026-03-30T15:26:40.368493+00:00","has_mcp":true,"has_api":false,"auth_methods":["Onshape API access key + secret key via HMAC authentication"],"has_free_tier":false,"known_gotchas":["Write operations may be non-idempotent (retries could duplicate entities/features unless the server tracks prior state).","Unit/angle conventions: sketch dimensions in inches are stated; instance transforms use inches/degrees—agents must be careful with units.","Some instance transform operations are described as failing on fixed instances; agents should handle such failures and possibly re-create or adjust instance constraints."],"error_quality":null}