Onshape
Onshape is a cloud-native computer-aided design (CAD) and product data management (PDM) platform, part of PTC, that runs entirely in a web browser with real-time collaboration, versioning, and configurations. Its public REST API (OpenAPI 3.0.1, base https://cad.onshape.com/api/v16) exposes documents, workspaces, versions and microversions, Part Studios, parts, assemblies, drawings, metadata, translations (CAD import/export), release management, and webhooks. Authentication is via OAuth 2.0 or HMAC-signed API keys, with offset/limit pagination and per-endpoint plus annual API call limits. Onshape was surfaced as an a16z portfolio company and enriched with its real developer surface by the API Evangelist pipeline.
Real signal across most facets with visible, nameable gaps — the contract exists but is thin, or the portal is good while governance and commercial terms are absent.
API Evangelist profiles Onshape the way a machine reads it — 51 machine-readable artifacts across 42 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Onshape scores 57.5/100 (developing), with a separate agent-readiness read of 78/100 (agent native). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
How we profile Onshape
Each block below is one kind of artifact we hold for Onshape. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 42
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
Onshape Account API
Manage user purchases, subscriptions, and consumables.
Onshape Alias API
Create and manage enterprise aliases. (Enterprise admins only.)
Onshape APIApplication API
Manage application preferences.
Onshape AppAssociativeData API
Manage the application-specific metadata that associates application data with Onshape data.
Onshape AppElement API
Access and modify application elements.
Onshape Assembly API
Create and manage assemblies.
Onshape Billing API
Get billing plan data for applications.
Onshape BlobElement API
Create, modify, and translate blob elements.
Onshape Comment API
Create, read, update, and delete comments.
Onshape Company API
Access company information.
Onshape Document API
Create and manage documents.
Onshape Drawing API
Access, create, and translate drawings.
Onshape Element API
Access and manage Elements. Every Element in an Onshape document is represented by a tab.
Onshape ExportRule API
Access valid export rules.
Onshape FeatureStudio API
Access and manage Feature Studio Elements.
Onshape Folder API
Access and modify folder sharing permissions.
Onshape Insertable API
Access the list of things that can be inserted into a document.
Onshape Item API
Manage non-geometric [items](https://cad.onshape.com/help/Content/Plans/items.htm). (Professional, Educator, and Enterprise accounts only.)
Onshape Material API
Work with the Onshape Material Library.
Onshape Metadata API
Access and modify metadata.
Onshape MetadataCategory API
Access properties associated with metadata categories.
Onshape NumberingScheme API
Manage the set of valid part numbers.
Onshape OpenApi API
Get the OpenAPI specification for the Onshape API.
Onshape Part API
Export Parts and access Part details.
Onshape PartNumber API
Create valid part numbers.
Onshape PartStudio API
Access and modify Part Studios.
Onshape ProductStructure API
Access information on how entities are structured within designs and documents.
Onshape PropertiesTableTemplate API
Create, access, and delete templates for properties tables.
Onshape Publication API
Access publication information.
Onshape ReleasePackage API
Endpoints for creating , updating, and managing releases. See [API Guide: Release Management](https://onshape-public.github.io/docs/api-adv/relmgmt/).
Onshape Revision API
Get revision information. See [API Guide: Release Management](https://onshape-public.github.io/docs/api-adv/relmgmt/)
Onshape Sketch API
Access sketch information.
Onshape StandardContent API
Work with Onshape standard content.
Onshape Task API
Create, access, and modify Tasks and Action Items.
Onshape Team API
Access team information.
Onshape Thumbnail API
Access, modify, and delete thumbnails.
Onshape Translation API
Import and export Onshape surfaces, parts, Part Studios, Assemblies, and subassemblies to/from other file formats (STL, PARASOLID, etc).
Onshape User API
Access user information.
Onshape Variables API
Create, modify, and access variables.
Onshape Version API
Get all versions of the Onshape REST APIs.
Onshape Webhook API
Create and manage [webhooks](https://onshape-public.github.io/docs/app-dev/webhook/).
Onshape Workflow API
Access and modify workflows.
Scroll within the panel for all 42 ·
MCP Servers 1
Model Context Protocol servers expose these APIs directly to AI agents. We profile them because agent-native access is the fastest-growing way this provider's capabilities actually get used.
Model Context Protocol servers that expose these APIs to AI agents.
onshape-mcp.yml
MCP SERVERRate Limits 1
Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.
Documented rate limits and quota policies.
Onshape Rate Limits
RATE LIMITSEvent Specifications 1
Not every API is request/response. AsyncAPI describes the event-driven and streaming side — the webhooks and channels — so the asynchronous half of the interface is documented the same way the synchronous half is.
AsyncAPI definitions for this provider's event-driven and streaming APIs.
Onshape Events Webhooks
ASYNCAPISecurity Posture 4
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Scopes 1
OAuth scopes are the vocabulary of least-privilege access. Profiling them shows exactly what an integration — or an agent acting on a user's behalf — is allowed to do.
OAuth scopes governing access to this provider's APIs.
Agentic Access 1
An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.
Recommended x-agentic-access execution contracts for AI agents.
Resources
Every other property we hold for Onshape — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Get Started 3
Portal, sign-up, and the first successful call
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 4
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 6
Pagination, idempotency, versioning, errors, and events
Build 3
SDKs, sample code, and the tooling you integrate with
Access & Security 7
Authentication, authorization, and security posture
Scroll within the panel for all 7 ·
Operate 5
Status, limits, changes, and where to get help
Commercial 2
Pricing, plans, and the legal terms of use
Company 1
The organization behind the API
Other 1
Properties that don't map to a standard resource type
← All providers · Data indexed from github.com/api-evangelist/onshape · machine-readable index on apis.io