Sound.xyz

Sound.xyz was a web3 music platform and suite of on-chain tools that let artists release music as digital collectibles and host listening parties for new releases, building direct economic relationships with their communities. The consumer platform went offline on 2026-01-16 (with a successor project, Vault.fm), but Sound.xyz's first-party developer surface remains publicly published: the open-source Sound protocol (a permissionless Solidity smart-contract framework for music collectibles) and the official @soundxyz npm SDK ecosystem (@soundxyz/sdk, sdk-viem, legacy-sdk) for on-chain development, alongside GraphQL and caching infrastructure libraries. Added to the API Evangelist network as an a16z portfolio company; this profile now reflects the enrichment pipeline's findings.

Sound.xyz is profiled on the APIs.io network. Tagged areas include Company, Music, Web3, Blockchain, and NFT.

Sound.xyz’s developer surface includes documentation and 6 more developer resources.

🌐 Visit website 📡 Source on GitHub

10.5/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

0 APIs

CompanyMusicWeb3BlockchainNFTSmart ContractsCreator EconomySDKEthereumDigital Collectibles

Kin Score

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

Composite quality — 10.5/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 3.0 / 20

Commercial Clarity 0.0 / 20

Operational Transparency 0.7 / 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/soundxyz: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

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

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: soundxyz
name: Sound.xyz
description: 'Sound.xyz was a web3 music platform and suite of on-chain tools that let artists release music as digital collectibles
  and host listening parties for new releases, building direct economic relationships with their communities. The consumer
  platform went offline on 2026-01-16 (with a successor project, Vault.fm), but Sound.xyz''s first-party developer surface
  remains publicly published: the open-source Sound protocol (a permissionless Solidity smart-contract framework for music
  collectibles) and the official @soundxyz npm SDK ecosystem (@soundxyz/sdk, sdk-viem, legacy-sdk) for on-chain development,
  alongside GraphQL and caching infrastructure libraries. Added to the API Evangelist network as an a16z portfolio company;
  this profile now reflects the enrichment pipeline''s findings.'
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/87795154?s=200&v=4
url: https://raw.githubusercontent.com/api-evangelist/soundxyz/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: platform-offline
x-status-note: Consumer platform and hosted GraphQL API (api.sound.xyz) went offline 2026-01-16; docs.sound.xyz returns HTTP
  402. On-chain protocol and npm SDKs remain published.
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Music
- Web3
- Blockchain
- NFT
- Smart Contracts
- Creator Economy
- SDK
- Ethereum
- Digital Collectibles
apis: []
common:
- type: GitHubOrganization
  url: https://github.com/soundxyz
- type: Website
  url: https://www.sound.xyz
- type: Documentation
  url: https://docs.sound.xyz
- type: SourceCode
  url: https://github.com/soundxyz/sound-protocol
- type: Packages
  url: packages/soundxyz-packages.yml
- type: SDKs
  url: packages/soundxyz-packages.yml
- type: DomainSecurity
  url: security/soundxyz-domain-security.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 2
  pass: local-v1