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 9 more developer resources.

🌐 Visit website 📡 Source on GitHub
25.3/100 emerging Agent 10/100 human only Full breakdown ↓
scored 2026-07-20 · rubric v0.4
1 APIs 0 Features
CompanyConsumerSpatial AudioAudioVoiceWebRTCSDKReal-Time CommunicationGaming

API Rating

API Evangelist API Evangelist Rating How this is scored →
scored 2026-07-20 · rubric v0.4
Composite quality — 25.3/100 · emerging
Contract Quality 0.0 / 25
Developer Ergonomics 7.0 / 20
Commercial Clarity 6.3 / 20
Operational Transparency 2.7 / 13
Governance 0.0 / 12
Discoverability 9.3 / 10
Agent readiness — 10/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 15
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
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

High Fidelity Spatial Audio API

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 ...

Resources

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 2

Status, limits, changes, and where to get help

ChangeLog
ChangeLog
 Support
Support

Commercial 3

Pricing, plans, and the legal terms of use

Pricing
Pricing
 TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 2

The organization behind the API

Blog
Blog
 Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
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
image: https://raw.githubusercontent.com/highfidelity/hifi-spatial-audio-js/main/utilities/spatialAudioLogo.svg
specificationVersion: '0.20'
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: 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