Cardboard

Cardboard is an agentic AI video editor that runs entirely in the browser. Users import raw footage and describe the edit in natural language — "make a 60-second recap", "cut this into ads" — and Cardboard cuts, captions, reframes (vertical/square/landscape), removes silences, generates and clones voiceovers, translates and dubs across languages, and composes a first draft on a real timeline the user can refine. It is built on multimodal LLMs plus WebGPU/WebCodecs to make a genuine non-linear editor possible in the browser, with real-time collaboration and frame-pinned comments. Cardboard was founded in the Y Combinator Winter 2026 batch and is a consumer/prosumer creative application; it does not currently publish a public developer API.

Cardboard is profiled on the APIs.io network. Tagged areas include Company, Video Editing, Artificial Intelligence, Video, and Creative Tools.

Cardboard’s developer surface includes pricing, signup flow, changelog, and 6 more developer resources.

🌐 Visit website 📡 Source on GitHub

17.7/100 emerging ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

0 APIs

CompanyVideo EditingArtificial IntelligenceVideoCreative ToolsMediaSaaSBrowser-BasedY Combinator

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 17.7/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 0.0 / 20

Commercial Clarity 8.9 / 20

Operational Transparency 2.1 / 13

Governance 0.0 / 12

Discoverability 6.8 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

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 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

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/cardboard: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Get Started 2

Portal, sign-up, and the first successful call

SignUp

SignUp

Login

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

ChangeLog

ChangeLog

ChangeLog

ChangeLog

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: cardboard
name: Cardboard
description: Cardboard is an agentic AI video editor that runs entirely in the browser. Users import raw footage and describe
  the edit in natural language — "make a 60-second recap", "cut this into ads" — and Cardboard cuts, captions, reframes (vertical/square/landscape),
  removes silences, generates and clones voiceovers, translates and dubs across languages, and composes a first draft on a
  real timeline the user can refine. It is built on multimodal LLMs plus WebGPU/WebCodecs to make a genuine non-linear editor
  possible in the browser, with real-time collaboration and frame-pinned comments. Cardboard was founded in the Y Combinator
  Winter 2026 batch and is a consumer/prosumer creative application; it does not currently publish a public developer API.
url: https://raw.githubusercontent.com/api-evangelist/cardboard/refs/heads/main/apis.yml
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://usecardboard.com/images/marketing/og-cover.jpg
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
x-tier: stub
x-tier-reason: portfolio-lead
x-yc-batch: W26
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Video Editing
- Artificial Intelligence
- Video
- Creative Tools
- Media
- SaaS
- Browser-Based
- Y Combinator
apis: []
common:
- type: DomainSecurity
  url: security/cardboard-domain-security.yml
- type: Website
  url: https://usecardboard.com
- type: Pricing
  url: https://usecardboard.com/pricing
- type: SignUp
  url: https://usecardboard.com/signup
- type: Login
  url: https://usecardboard.com/login
- type: TermsOfService
  url: https://usecardboard.com/terms
- type: PrivacyPolicy
  url: https://usecardboard.com/privacy
- type: ChangeLog
  url: https://usecardboard.com/changelog
- type: ChangeLog
  name: Cardboard changelog (harvested)
  url: changelog/cardboard-changelog.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence