High Fidelity

High Fidelity provides live spatial audio technology for apps and games. Its Spatial Audio Client Library (hifi-spatial-audio, MIT) lets developers embed realistic positional voice — 3D azimuth/distance transforms, nearfield "whisper" audio, noise reduction, and many simultaneous speakers over the Opus codec — into web and native applications, and previously connected them to a hosted Spatial Audio API server via signed connection JWTs. Apps including Clubhouse, Hubbub, Breakroom, and Soundstage used the technology. The hosted API service has since been discontinued; the SDK remains open source, and the company's active product is Quad, a spatial social platform that recreates physical meeting spaces. High Fidelity was founded by Philip Rosedale and is a portfolio company of GV.

High Fidelity publishes 1 API on the APIs.io network. Tagged areas include Company, Consumer, Spatial Audio, Audio, and Voice.

High Fidelity’s developer surface includes authentication, changelog, getting-started guide, engineering blog, support, pricing, and 12 more developer resources.

🌐 Visit website 📡 Source on GitHub

23.4/100 emerging ▬ flat Agent 3/100 human only open core · MIT Full breakdown ↓
scored 2026-08-30 · rubric v0.17.2

1 APIs

Company Consumer Spatial Audio Audio Voice WebRTC SDK Real-Time Communication Gaming

Kin Score

Kin Score How this is scored →
scored 2026-08-30 · rubric v0.17.2

Composite quality — 23.4/100 · emerging

Contract Quality 0.0 / 23

Developer Ergonomics 6.9 / 18

Access Clarity 5.7 / 18

Operational Transparency 2.2 / 12

Contract Governance 0.0 / 11

Discoverability 6.2 / 9

Open Source Surface 2.5 / 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 10 / 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 Surface 0 / 5

Open Source Surface applies to this provider. This product is open source and we read its repository directly, so Open Source Surface carries 10 points of the composite. It is scored from what the repository actually publishes — a security policy, a contribution guide, a release history, a code of conduct — read live from the provider rather than inferred from our own catalog pointers. This facet adds; nothing was taken away to make room for it. An open-source project is not excused from the commercial facets, because exemption would strip it of the points it does earn. If we have the wrong repository, or this product is not open source, say so on your provider repo and we will drop the facet rather than have you publish against it.

The six quality facets above are damped to 90 points between them, because the conditional facet above carries the other 10. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 90% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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/high-fidelity: 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 1

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

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Lifecycle

Lifecycle

Build 3

SDKs, sample code, and the tooling you integrate with

Packages

Packages

SDKs

SDKs

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 4

Status, limits, changes, and where to get help

IssueTracker

Releases

ChangeLog

Support

Commercial 4

Pricing, plans, and the legal terms of use

License

Pricing

TermsOfService

PrivacyPolicy

Company 2

The organization behind the API

Blog

Blog

Website

Website

Source (apis.yml)

aid: high-fidelity
name: High Fidelity
description: High Fidelity provides live spatial audio technology for apps and games. Its Spatial Audio Client Library (hifi-spatial-audio,
  MIT) lets developers embed realistic positional voice — 3D azimuth/distance transforms, nearfield "whisper" audio, noise
  reduction, and many simultaneous speakers over the Opus codec — into web and native applications, and previously connected
  them to a hosted Spatial Audio API server via signed connection JWTs. Apps including Clubhouse, Hubbub, Breakroom, and Soundstage
  used the technology. The hosted API service has since been discontinued; the SDK remains open source, and the company's
  active product is Quad, a spatial social platform that recreates physical meeting spaces. High Fidelity was founded by Philip
  Rosedale and is a portfolio company of GV.
url: https://raw.githubusercontent.com/api-evangelist/high-fidelity/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- gv
x-tier: stub
x-tier-reason: portfolio-lead
x-lifecycle: hosted-api-discontinued
deliveryModel:
  model: open-core
  license: MIT
  open_source: true
  commercial: true
  callable_host: false
  label: Open core · an OSS project plus a commercial hosted product
  confidence: high
  source:
  - license
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://raw.githubusercontent.com/highfidelity/hifi-spatial-audio-js/main/utilities/spatialAudioLogo.svg
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Consumer
- Spatial Audio
- Audio
- Voice
- WebRTC
- SDK
- Real-Time Communication
- Gaming
apis:
- name: High Fidelity Spatial Audio API
  description: Client SDK and hosted spatial audio server for embedding real-time positional voice in web and native apps.
    Auth is a connection JWT signed with the developer's App Secret. The hosted server has been discontinued; the SDK is open
    source (MIT).
  humanURL: https://www.highfidelity.com/api/guides
  baseURL: https://api.highfidelity.com
  tags:
  - Spatial Audio
  - Voice
  - WebRTC
  properties:
  - type: SourceCode
    url: https://github.com/highfidelity/hifi-spatial-audio-js
  - type: GettingStarted
    url: https://www.highfidelity.com/api/guides
  - type: Packages
    url: packages/high-fidelity-packages.yml
  - type: Authentication
    url: authentication/high-fidelity-authentication.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: IssueTracker
  url: https://github.com/highfidelity/hifi-spatial-audio-js/issues
- type: Releases
  url: https://github.com/highfidelity/hifi-spatial-audio-js/releases
- type: License
  name: MIT
  url: https://github.com/highfidelity/hifi-spatial-audio-js/blob/main/LICENSE
- type: Packages
  url: packages/high-fidelity-packages.yml
- type: SDKs
  url: packages/high-fidelity-packages.yml
- type: Authentication
  url: authentication/high-fidelity-authentication.yml
- type: Lifecycle
  url: lifecycle/high-fidelity-lifecycle.yml
- type: ChangeLog
  url: changelog/high-fidelity-changelog.yml
- type: DomainSecurity
  url: security/high-fidelity-domain-security.yml
- type: LLMsTxt
  url: llms/high-fidelity-llms.txt
- type: GettingStarted
  url: https://www.highfidelity.com/api/guides
- type: GitHubOrganization
  url: https://github.com/highfidelity
- type: Blog
  url: https://www.highfidelity.com/blog
- type: Support
  url: https://www.highfidelity.com/contact
- type: Pricing
  url: https://www.highfidelity.com/pricing
- type: TermsOfService
  url: https://www.highfidelity.com/terms-of-service
- type: PrivacyPolicy
  url: https://www.highfidelity.com/privacy
- type: Website
  url: https://www.highfidelity.com
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

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