AltspaceVR

AltspaceVR was a social virtual reality platform founded in 2013 where people gathered in shared 3D spaces for live events, meetups, classes, comedy shows and conferences. Google Ventures (GV) was an early investor. Microsoft acquired the company in 2017 and folded it into its Mixed Reality division, then announced in January 2023 that the platform would close, shutting it down permanently on 2023-03-10 in favor of Microsoft Mesh. AltspaceVR published no hosted HTTP API; its developer surface was the Mixed Reality Extension (MRE) SDK for building server-hosted 3D world extensions in Node.js, plus the earlier web-based AltspaceSDK. Every SDK repository is now archived and altvr.com redirects to microsoft.com. This profile is retained as a historical record of a terminated platform, not as a live integration target.

AltspaceVR is profiled on the APIs.io network. Tagged areas include Company, Consumer, Virtual Reality, Social VR, and Mixed Reality.

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

🌐 Visit website 📡 Source on GitHub

10.8/100 minimal ▬ flat Agent 3/100 human only Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

0 APIs

Company Consumer Virtual RealitySocial VRMixed Reality Metaverse Gaming Discontinued

Kin Score

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

Composite quality — 10.8/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 3.3 / 20

Access Clarity 0.0 / 20

Operational Transparency 1.7 / 13

Contract Governance 0.0 / 12

Discoverability 5.7 / 10

Agent readiness — 3/100 · 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 4 / 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.

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Security Posture 1

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

Altspacevr Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

WellKnown

WellKnown

LLMsTxt

LLMsTxt

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Lifecycle

Lifecycle

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

SourceCode

Packages

SDKs

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Deprecation

Deprecation

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: altspacevr
name: AltspaceVR
description: AltspaceVR was a social virtual reality platform founded in 2013 where people gathered in shared 3D spaces for
  live events, meetups, classes, comedy shows and conferences. Google Ventures (GV) was an early investor. Microsoft acquired
  the company in 2017 and folded it into its Mixed Reality division, then announced in January 2023 that the platform would
  close, shutting it down permanently on 2023-03-10 in favor of Microsoft Mesh. AltspaceVR published no hosted HTTP API; its
  developer surface was the Mixed Reality Extension (MRE) SDK for building server-hosted 3D world extensions in Node.js, plus
  the earlier web-based AltspaceSDK. Every SDK repository is now archived and altvr.com redirects to microsoft.com. This profile
  is retained as a historical record of a terminated platform, not as a live integration target.
url: https://raw.githubusercontent.com/api-evangelist/altspacevr/refs/heads/main/apis.yml
deliveryModel:
  model: unknown
  open_source: unknown
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - repository-unlicensed
  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://avatars.githubusercontent.com/u/7229981?v=4
x-type: company
x-source: vc-portfolio
x-backed-by:
- gv
x-tier: stub
x-tier-reason: portfolio-lead
x-status: shutdown
x-shutdown-date: '2023-03-10'
x-acquired-by: Microsoft
x-superseded-by: Microsoft Mesh
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Consumer
- Virtual Reality
- Social VR
- Mixed Reality
- Metaverse
- Gaming
- Discontinued
apis: []
common:
- type: DomainSecurity
  url: security/altspacevr-domain-security.yml
- url: https://altvr.com/
  type: Website
- url: https://github.com/AltspaceVR
  type: GitHubOrganization
- url: https://github.com/microsoft/mixed-reality-extension-sdk
  type: SourceCode
- url: https://en.wikipedia.org/wiki/AltspaceVR
  type: Documentation
- url: packages/altspacevr-packages.yml
  type: Packages
- url: packages/altspacevr-packages.yml
  type: SDKs
- url: lifecycle/altspacevr-lifecycle.yml
  type: Lifecycle
- url: lifecycle/altspacevr-lifecycle.yml
  type: Deprecation
- url: well-known/altspacevr-well-known.yml
  type: WellKnown
- url: llms/altspacevr-llms.txt
  type: LLMsTxt
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 5
  pass: local-v1
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io

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