Spline
Spline is a web-based, real-time collaborative 3D design platform used to create interactive 3D scenes, animations, and product experiences for the web, iOS, and Android. The Spline editor runs in the browser and supports multi-user collaboration with comments, link sharing, and team workspaces. Designers build scenes using primitives and modeling tools, a layer-based material system, states, events, timeline animation, game controls, physics, and particles. Scenes can be exported as GLTF/GLB, USDZ, STL, video, image sequences, or as code for the web, SwiftUI, and Kotlin. Spline's developer surface centers on runtime libraries — `@splinetool/runtime`, the `@splinetool/react-spline` React component, the `r3f-spline` hook for react-three-fiber, and `spline-ios` for Apple platforms — plus an embeddable Spline Viewer web component. Inside scenes, Spline exposes a Real-time API for dynamic data binding and webhooks for event-driven integrations. The company also ships Hana, a web-based collaborative UI design tool with infinite canvas, vector networks, visual effects, and motion design. Spline's revenue model is SaaS subscription with Free, Starter ($12/mo annual), Professional ($20/mo annual), and Enterprise tiers, plus a Spline AI add-on ($5/seat/month, 2000 AI credits) for prompt-driven 3D generation. There is no publicly documented Spline REST/management API or OpenAPI specification at this time; programmatic surfaces are limited to the runtime SDKs, the Real-time API, and webhooks exposed from within a scene.
More than an index entry, but the surface is still mostly links rather than artifacts — the cohort most likely to move a full band from modest, well-targeted work.
API Evangelist profiles Spline the way a machine reads it — 3 machine-readable artifacts, 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 — Spline scores 13.4/100 (emerging), with a separate agent-readiness read of 5/100 (human only). 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 2026-08-17 · rubric v0.11.0
Put this on your own site. The badge is drawn live from Spline's current Kin Score — paste it once and it updates itself every time the score is recomputed. It follows your visitor's light or dark setting, and it links back here so anyone who sees it can read the full breakdown.
<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/spline-design/"
title="Spline on API Evangelist — API profile and Kin Score">
<img src="https://apis.io/badge/spline-design.svg"
alt="Spline Kin Score — API readiness rating by API Evangelist" width="150" height="150" loading="lazy">
</a>[](https://providers.apievangelist.com/providers/spline-design/)<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/spline-design/"
title="Spline on API Evangelist — API profile and Kin Score">
<img src="https://apis.io/badge/spline-design/card.svg"
alt="Spline Kin Score — API readiness rating by API Evangelist" width="340" height="120" loading="lazy">
</a>More shapes, themes and sizes → · Score as JSON · How badges work
How we profile Spline
Each block below is one kind of artifact we hold for Spline. 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.
Security Posture 3
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.
Resources
Every other property we hold for Spline — 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.
Documentation 1
Reference material describing how the API behaves
Design & Contract 1
Pagination, idempotency, versioning, errors, and events
Build 7
SDKs, sample code, and the tooling you integrate with
Scroll within the panel for all 7 ·
Access & Security 3
Authentication, authorization, and security posture
Learn 2
Tutorials, courses, talks, and written guidance
Operate 2
Status, limits, changes, and where to get help
Commercial 1
Pricing, plans, and the legal terms of use
Company 4
The organization behind the API
Other 5
Properties that don't map to a standard resource type
← All providers · Data indexed from github.com/api-evangelist/spline-design · machine-readable index on apis.io
This is an independent, third-party profile of Spline, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
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you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.