ProtoPie API
ProtoPie has no public API for its own cloud: no endpoints to list projects, pull comments, or manage workspaces, and no webhooks or SDKs. The Connect API plugin only lets prototypes call external REST APIs (GET and POST), and it requires the desktop app.
Frequently asked questions
ProtoPie scores A on the API Report Card. ProtoPie has no public API for its own cloud: no endpoints to list projects, pull comments, or manage workspaces, and no webhooks or SDKs. The Connect API plugin only lets prototypes call external REST APIs (GET and POST), and it requires the desktop app.
ProtoPie has a workable official integration path. Most engineering teams can build against it directly. Open API: self-serve, documented, with SDKs
ProtoPie (Studio XID Inc., headquartered in Seoul, South Korea with offices in San Francisco and Tokyo; founded 2017 by Tony Kim) is a high-fidelity interaction-prototyping platform built around two products: ProtoPie Studio (desktop authoring app for macOS and Windows) and ProtoPie Connect (a desktop runtime that bridges prototypes to live APIs, hardware sensors, IoT devices, and multiple displays).
Vertical: misc, horizontal UX/UI prototyping tool with a defensible niche in automotive HMI / in-vehicle infotainment (IVI) and instrument cluster prototyping. Not a vertical SaaS in any Supergood-named vertical. Automotive HMI prototyping: building functional IVI head-unit, digital cluster, HUD, and rear-seat-entertainment prototypes that respond to real CAN-bus signals, speed inputs, steering-wheel buttons, and physical controls (via Connect + Arduino/Unity/CAN bridges).
Low-to-medium overall, but high (near-default) inside the automotive HMI niche. Reliable horizontal share data is sparse, ProtoPie does not appear in the top tier of 6sense/G2 'collaborative design and prototyping' market-share charts dominated by Figma (~38%) and Sketch.
Data that flows through / lives inside ProtoPie Studio + Connect + Cloud on behalf of customer organizations: Prototype source files (.pie): scenes, layers, components, master/instance relationships, variables, formulas, conditional logic, triggers, responses, interactions, animations, sounds, embedded fonts/images/video.
Founded 2017 by Tony Kim; Studio XID Inc. headquartered in Seoul. Younger than Figma (2012/2016 launch), Axure (2002), and Sketch (2010).
No public REST API for ProtoPie Cloud, no programmatic way to list projects, manage workspace members, fetch comments, or pull published-prototype metadata. No webhooks, no event push for new comments, new versions, or workspace activity; teams building custom workflows must poll or screen-scrape. Full sourced list under Sources below.
Common alternatives include Figma, Framer, Axure, Adobe XD, Sketch, Justinmind. Graded alternatives appear under "More from the report card" below.
Grades measure one thing: can a customer's engineering team get their own data out programmatically? We check six things (whether a real API exists, how access is gated, data coverage, auth quality, docs and developer experience, and stability) and roll them into a letter grade. Grades get re-verified, and they only move on evidence.