Within

Within (Within Unlimited, Inc.) is a Los Angeles virtual-reality studio founded in 2014 by Chris Milk and Aaron Koblin, both alumni of Google's Data Arts team. Andreessen Horowitz (a16z) led the company's 2016 Series A. Within builds Supernatural, a VR fitness service for Meta Quest headsets that pairs live human coaches with rhythm-mapped workouts set in 360-degree virtual locations; its earlier work spans immersive 360 video and AR (Clouds Over Sidra, Wonderscope). Meta Platforms acquired Within in February 2023 after the FTC's challenge to the deal failed, and it now operates as a Meta studio. Within is a consumer VR product company and publishes no public developer API, OpenAPI, SDK, or developer portal; its primary domain within.com is currently parked. This profile is retained as an a16z portfolio lead with no API surface to enrich.

Within is profiled on the APIs.io network. Tagged areas include Company, Virtual Reality, VR, Fitness, and Consumer.

📡 Source on GitHub

5.0/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

0 APIs

Company Virtual Reality VR Fitness Consumer Immersive Media Meta

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 5.0/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 0.0 / 20

Access Clarity 0.0 / 20

Operational Transparency 0.0 / 13

Contract Governance 0.0 / 12

Discoverability 5.0 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

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

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/within: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Source (apis.yml)

aid: within
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
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://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/within.png
name: Within
description: Within (Within Unlimited, Inc.) is a Los Angeles virtual-reality studio founded in 2014 by Chris Milk and Aaron
  Koblin, both alumni of Google's Data Arts team. Andreessen Horowitz (a16z) led the company's 2016 Series A. Within builds
  Supernatural, a VR fitness service for Meta Quest headsets that pairs live human coaches with rhythm-mapped workouts set
  in 360-degree virtual locations; its earlier work spans immersive 360 video and AR (Clouds Over Sidra, Wonderscope). Meta
  Platforms acquired Within in February 2023 after the FTC's challenge to the deal failed, and it now operates as a Meta studio.
  Within is a consumer VR product company and publishes no public developer API, OpenAPI, SDK, or developer portal; its primary
  domain within.com is currently parked. This profile is retained as an a16z portfolio lead with no API surface to enrich.
url: https://raw.githubusercontent.com/api-evangelist/within/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
x-tier: stub
x-tier-reason: portfolio-lead
x-status: acquired
x-acquired-by: Meta Platforms
x-acquired-date: 2023-02
x-api-surface: none
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Virtual Reality
- VR
- Fitness
- Consumer
- Immersive Media
- Meta
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-21'
  status: nochange
  artifacts_added: 0
  pass: local-v1

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