AudD

AudD is a music recognition service. Its REST API identifies songs from short audio clips, uploaded files or URLs on api.audd.io, scans audio and video files of any length on the enterprise endpoint (enterprise.audd.io), monitors live audio streams with results delivered by callback or longpoll, and adds an account's own tracks to a custom catalog (special access). Matches return track metadata (artist, title, album, ISRC) with optional Apple Music, Spotify, Deezer and MusicBrainz data.

AudD publishes 4 API contracts indexed on the APIs.io network, including Recognition API, Custom Catalog API, Streams API, and 1 more. Tagged areas include Music, Music Recognition, Audio, and Fingerprinting.

AudD’s developer surface includes authentication, documentation, and 10 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

26.4/100 thin ▬ flat Agent 57/100 agent ready Front door AI 4/6 moderate saas Full breakdown ↓
scored 2026-10-23 · rubric v0.25.0 · Show this score on your site →

AccessFreemiumOpenFree trial⚡ Free to try

1 published contract 1 MCP Servers

Music Music Recognition Audio Fingerprinting

Kin Score

Kin Score How this is scored →
scored 2026-10-23 · rubric v0.25.0

Composite quality — 26.4/100 · thin

Contract Quality 9.3 / 19

Developer Ergonomics 3.9 / 15

Access Clarity 1.2 / 15

Operational Transparency 1.0 / 10

Contract Governance 0.0 / 9

Discoverability 5.3 / 8

Regulatory Posture 1.8 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 57/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 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 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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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/audd: 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Browser Extension Stores (company-published Firefox add-ons; Chrome Web Store unreadable)	undeclared	-	1	-
Discord App Directory (builders of apps on Discord)	undeclared	-	1	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

APIs 4

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

AudD Recognition API

Music recognition from a short clip, file or URL (api.audd.io), and the enterprise endpoint for audio and video files of any length (enterprise.audd.io).

AudD Custom Catalog API

Add your own tracks to a custom recognition catalog (special access).

AudD Streams API

Live audio stream monitoring - add and manage streams, with recognition results delivered by callback URL or longpoll.

AudD Agent payments API

The Agent payments API from AudD — 3 operation(s) for agent payments.

Open Collections 3

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

AudD Music Recognition Custom catalog API

OPEN COLLECTION

AudD Music Recognition API

OPEN COLLECTION

AudD Music Recognition Streams API

OPEN COLLECTION

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

AudD MCP Server

Remote MCP server at mcp.audd.io over HTTP.

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Audd Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Audd Rate Limits

4 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Audd Finops

FINOPS

Security Posture 2

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

Audd Authentication

apiKey · 1 scheme

SECURITY

Audd Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Audd Agentic Access

11 operations · 5 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

WellKnown

WellKnown

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

Company 2

The organization behind the API

LinkedIn

Website

Website

Other 1

Properties that don't map to a standard resource type

APICatalog

APICatalog

Source (apis.yml)

aid: audd
url: https://raw.githubusercontent.com/api-evangelist/audd/refs/heads/main/apis.yml
name: AudD
kind: company
description: AudD is a music recognition service. Its REST API identifies songs from short audio clips, uploaded files or
  URLs on api.audd.io, scans audio and video files of any length on the enterprise endpoint (enterprise.audd.io), monitors
  live audio streams with results delivered by callback or longpoll, and adds an account's own tracks to a custom catalog
  (special access). Matches return track metadata (artist, title, album, ISRC) with optional Apple Music, Spotify, Deezer
  and MusicBrainz data.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: open
  trial: true
  try_now: true
  public: true
  label: Freemium (free trial) · Open access
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/audd.png
x-docs-platform: docusaurus
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-09-19
x-docs-hosting: cloudflare-pages
tags:
- Music
- Music Recognition
- Audio
- Fingerprinting
created: '2026-06-21'
modified: '2026-10-08'
specificationVersion: '0.23'
apis:
- aid: audd:audd-recognition-api
  name: AudD Recognition API
  description: Music recognition from a short clip, file or URL (api.audd.io), and the enterprise endpoint for audio and video
    files of any length (enterprise.audd.io).
  humanURL: https://docs.audd.io/
  baseURL: https://api.audd.io
  tags:
  - Recognition
  properties:
  - type: OpenAPI
    url: openapi/audd-recognition-api-openapi.yml
  - type: Documentation
    url: https://docs.audd.io/
  - type: APIReference
    url: https://docs.audd.io/#recognize
  - type: Documentation
    url: https://docs.audd.io/enterprise/
  - type: PostmanCollection
    url: collections/audd-recognition-api.postman_collection.json
  - type: OpenCollection
    url: collections/audd-recognition-api.opencollection.json
- aid: audd:audd-custom-catalog-api
  name: AudD Custom Catalog API
  description: Add your own tracks to a custom recognition catalog (special access).
  humanURL: https://docs.audd.io/
  baseURL: https://api.audd.io
  tags:
  - Custom catalog
  properties:
  - type: OpenAPI
    url: openapi/audd-custom-catalog-api-openapi.yml
  - type: Documentation
    url: https://docs.audd.io/upload_audio_endpoint/
  - type: PostmanCollection
    url: collections/audd-custom-catalog-api.postman_collection.json
  - type: OpenCollection
    url: collections/audd-custom-catalog-api.opencollection.json
- aid: audd:audd-streams-api
  name: AudD Streams API
  description: Live audio stream monitoring - add and manage streams, with recognition results delivered by callback URL or
    longpoll.
  humanURL: https://docs.audd.io/
  baseURL: https://api.audd.io
  tags:
  - Streams
  properties:
  - type: OpenAPI
    url: openapi/audd-streams-api-openapi.yml
  - type: Documentation
    url: https://docs.audd.io/streams/
  - type: PostmanCollection
    url: collections/audd-streams-api.postman_collection.json
  - type: OpenCollection
    url: collections/audd-streams-api.opencollection.json
- aid: audd:audd-agent-payments-api
  name: AudD Agent payments API
  description: The Agent payments API from AudD — 3 operation(s) for agent payments.
  humanURL: https://docs.audd.io/
  baseURL: https://api.audd.io
  tags:
  - Agentic Payments
  tags_raw:
  - Agent payments
  properties:
  - type: OpenAPI
    url: openapi/audd-agent-payments-api-openapi.yml
common:
- type: AgenticAccess
  url: agentic-access/audd-agentic-access.yml
- type: DomainSecurity
  url: security/audd-domain-security.yml
- type: Authentication
  url: authentication/audd-authentication.yml
- type: GitHubOrganization
  url: https://github.com/AudDMusic
- type: LinkedIn
  url: https://www.linkedin.com/company/audd-io
- type: Website
  url: https://audd.io/
- type: Documentation
  url: https://docs.audd.io/
- type: WellKnown
  url: well-known/audd-well-known.yml
- type: APICatalog
  url: https://audd.io/.well-known/api-catalog
- type: Plans
  url: plans/audd-plans-pricing.yml
- type: RateLimits
  url: rate-limits/audd-rate-limits.yml
- type: FinOps
  url: finops/audd-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-correction-request:
  requested: '2026-10-07'
  source:
  - _messages/2026-10/2026-10-07-fastmail-38767-corrections-for-the-audd-profile-githubcomapi-evan.md
  request: 'AudD API Team (api@audd.io), 2026-10-07: (1) the OpenAPI in the repo is not theirs -- use https://audd.io/openapi.json
    (OpenAPI 3.1, also in https://audd.io/.well-known/api-catalog); (2) humming/singing recognition is legacy and unsupported
    -- exclude it; (3) lyrics search is not a supported feature -- remove the Lyrics API and lyrics tags; (4) results no longer
    include Napster; (5) errors, including rate-limit errors, are HTTP 200 with "status": "error" and an error code, never
    429; (6) the enterprise endpoint and the streams API are documented and in the spec; (7) recognition requests modify nothing
    and should not be labelled write.'
  applied: '2026-10-08'
  applied_note: 'Verified live 2026-10-08: https://audd.io/openapi.json 200 (OpenAPI 3.1.0, info.version 1.4.4, 11 operations:
    recognize GET/POST, recognizeEnterprise on enterprise.audd.io, 7 streams operations, customCatalogAdd); api-catalog 200
    application/linkset+json naming it as service-desc; docs.audd.io/streams/ and /upload_audio_endpoint/ 200; ErrorResponse
    is status const "error" + error_code. Removed the pipeline-written 3.0.1 _original (it invented recognizeWithOffset, findLyrics
    and humming) and its Lyrics/Recognition splits; archived the provider''s spec verbatim and re-split into Recognition,
    Streams and Custom Catalog APIs; regenerated the Postman and Open Collection files from the new splits and removed the
    lyrics and combined ones. Lyrics tag and humming/lyrics plan, finops and review text removed; Napster dropped from the
    description and README (note: the provider''s own spec still defines a NapsterMetadata schema, "may be absent"). Rate
    limits now record HTTP 200 + status error, no 429. Agentic access re-derived from the new spec and recognize/recognizeEnterprise
    curated to read (method: searched). api-catalog harvested into well-known/ and pointed to.'

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