Zeplin API
Zeplin ships a public REST API with an open-source OpenAPI spec and an official JavaScript SDK. Personal access tokens are self-serve from the profile Developer tab; public OAuth apps need manual registration. Webhooks are first-class, and the documented limit is 200 requests/min per user.
Frequently asked questions
Zeplin scores A on the API Report Card. Zeplin ships a public REST API with an open-source OpenAPI spec and an official JavaScript SDK. Personal access tokens are self-serve from the profile Developer tab; public OAuth apps need manual registration. Webhooks are first-class, and the documented limit is 200 requests/min per user.
Zeplin has a workable official integration path. Most engineering teams can build against it directly. Open API: self-serve, documented, with SDKs
Zeplin is a dedicated design delivery platform that sits between design tools (Figma, Sketch, Adobe XD) and the engineers who implement the resulting UI. Per CEO Pelin Kenez, 'design delivery is a phase of its own.
Vertical: misc (horizontal designer/developer tooling, not in any of Supergood's 23 named verticals). Designer-to-developer handoff: designer publishes a finalized version of a screen from Figma/Sketch/XD into a Zeplin project; developer opens the screen and copies spec values (px/dp/pt, colors, type tokens), exports assets at multiple resolutions, and grabs auto-generated code snippets (CSS, iOS Swift, Android XML/Compose, React/RN)..
Medium-high within the design-handoff niche, medium overall in the broader design-tools market. Zeplin reports 2M+ users and 200K+ companies.
Design artifacts: Finalized screens, screen versions and commit messages, sections, user-flow connectors, annotations/notes, components, styleguides, design tokens (colors, type, spacing)..
Founded 2014 in Istanbul; HQ now in San Francisco with continued Istanbul presence.
Rate limit of 200 req/min per user is restrictive for large enterprise automations (e.g., bulk asset sync across thousands of screens). Some resources are read-only, customers cannot fully CRUD all object types (e.g., create projects/screens programmatically), forcing manual setup in the UI. Full sourced list under Sources below.
Common alternatives include Figma (Dev Mode), Adobe XD (Share for Review/Dev), InVision (DSM/Inspect), Sympli, Avocode (Sketch/Figma handoff), Anima. 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.