Spline website screenshot

Spline

Spline is a real-time collaborative 3D design tool with AI-driven object generation, web embedding, and animation. Spline does NOT publish a REST API for 3D scene generation as of May 2026; instead it exposes Code APIs (Web, SwiftUI, Kotlin) for embedding scenes, plus a real-time API for variables/data and webhooks for event-driven integrations.

Spline publishes 5 APIs on the APIs.io network. Tagged areas include 3D, Design, AI, Collaboration, and Web.

Spline’s developer surface includes documentation and 10 more developer resources.

🌐 Visit website 📡 Source on GitHub
22.0/100 emerging ▬ flat Agent 3/100 human only Full breakdown ↓
scored 2026-08-05 · rubric v0.9.1
AccessFreemium
5 APIs
3DDesignAICollaborationWebSDK

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-05 · rubric v0.9.1
Composite quality — 22.0/100 · emerging
Contract Quality 0.0 / 25
Developer Ergonomics 1.7 / 20
Commercial Clarity 9.5 / 20
Operational Transparency 3.4 / 13
Governance 0.0 / 12
Discoverability 7.4 / 10
Agent readiness — 3/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/spline: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 5

Individual APIs this provider publishes, each with its own machine-readable definition.

Spline Code API for Web

Client SDK for embedding and interacting with Spline scenes from JavaScript.

Spline Code API for SwiftUI

iOS client SDK for embedding Spline scenes in SwiftUI apps.

Spline Code API for Kotlin

Android client SDK for embedding Spline scenes in Kotlin apps.

Spline Real-time Variables and Data API

Real-time API for binding variables and data into live Spline scenes.

Spline Webhooks

Webhook events for Spline integrations.

Pricing Plans 1

Published pricing tiers and plan structures.

Spline Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Spline Rate Limits

2 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Spline Finops

FINOPS

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Spline Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Spline Vulnerability Disclosure

disclosure policy published

SECURITY

Spline Trust Center

SOC 2, ISO 27001, GDPR

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LlmsText
LlmsText

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

TrustCenter
TrustCenter
 VulnerabilityDisclosure
VulnerabilityDisclosure
 DomainSecurity
DomainSecurity

Operate 1

Status, limits, changes, and where to get help

RateLimits
RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans
Plans
 FinOps
FinOps

Company 2

The organization behind the API

LinkedIn
LinkedIn
 Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: spline
url: https://raw.githubusercontent.com/api-evangelist/spline/refs/heads/main/apis.yml
name: Spline
kind: company
description: Spline is a real-time collaborative 3D design tool with AI-driven object generation, web embedding, and animation.
  Spline does NOT publish a REST API for 3D scene generation as of May 2026; instead it exposes Code APIs (Web, SwiftUI, Kotlin)
  for embedding scenes, plus a real-time API for variables/data and webhooks for event-driven integrations.
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/spline.png
tags:
- 3D
- Design
- AI
- Collaboration
- Web
- SDK
created: '2026-05-08'
modified: '2026-05-08'
specificationVersion: '0.19'
apis:
- aid: spline:code-api-web
  name: Spline Code API for Web
  description: Client SDK for embedding and interacting with Spline scenes from JavaScript.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://docs.spline.design/code-api-for-web
  baseURL: https://docs.spline.design/code-api-for-web
  tags:
  - SDK
  - JavaScript
  - 3D Embed
  properties:
  - type: Documentation
    url: https://docs.spline.design/code-api-for-web
- aid: spline:code-api-swiftui
  name: Spline Code API for SwiftUI
  description: iOS client SDK for embedding Spline scenes in SwiftUI apps.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://docs.spline.design/code-api-for-swiftui
  baseURL: https://docs.spline.design/code-api-for-swiftui
  tags:
  - SDK
  - SwiftUI
  - iOS
  properties:
  - type: Documentation
    url: https://docs.spline.design/code-api-for-swiftui
- aid: spline:code-api-kotlin
  name: Spline Code API for Kotlin
  description: Android client SDK for embedding Spline scenes in Kotlin apps.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://docs.spline.design/code-api-for-kotlin
  baseURL: https://docs.spline.design/code-api-for-kotlin
  tags:
  - SDK
  - Kotlin
  - Android
  properties:
  - type: Documentation
    url: https://docs.spline.design/code-api-for-kotlin
- aid: spline:realtime-variables
  name: Spline Real-time Variables and Data API
  description: Real-time API for binding variables and data into live Spline scenes.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://docs.spline.design/variables-and-data
  baseURL: https://docs.spline.design/variables-and-data
  tags:
  - Realtime
  - Variables
  - Data Binding
  properties:
  - type: Documentation
    url: https://docs.spline.design/variables-and-data
- aid: spline:webhooks
  name: Spline Webhooks
  description: Webhook events for Spline integrations.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://docs.spline.design/webhooks
  baseURL: https://docs.spline.design/webhooks
  tags:
  - Webhooks
  - Events
  properties:
  - type: Documentation
    url: https://docs.spline.design/webhooks
common:
- type: TrustCenter
  url: security/spline-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/spline-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/spline-domain-security.yml
- type: GitHubOrganization
  url: https://github.com/splinetool
- type: LinkedIn
  url: https://www.linkedin.com/company/splinetool
- type: Website
  url: https://spline.design/
- type: Documentation
  url: https://docs.spline.design/
- type: Plans
  url: plans/spline-plans-pricing.yml
- type: RateLimits
  url: rate-limits/spline-rate-limits.yml
- type: FinOps
  url: finops/spline-finops.yml
- type: LlmsText
  url: https://docs.spline.design/llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com