SoundStat

SoundStat is an independent audio analysis API that returns detailed per-track features - tempo (BPM), key, mode, energy, danceability, valence, instrumentalness, acousticness, loudness, plus segment and beat structure - for music tracks referenced by Spotify track ID. Launched in early 2025 as an alternative after Spotify deprecated its public audio-features and recommendations endpoints, SoundStat has analyzed several million tracks and layers a rich recommendation engine (similar, feature-target, mixed-seed, mood, activity, time-of-day, cross-genre, DJ-compatible, contrast, hidden-gems, and more) plus genre-and-feature search on top of its analysis corpus. The REST API is authenticated with an x-api-key header and billed per unique track analyzed.

SoundStat publishes 5 API contracts indexed on the APIs.io network, including Genres API, Recommendations API, Stats API, and 2 more. Tagged areas include Music, Audio Analysis, Audio Features, Recommendations, and Track Analysis.

The SoundStat catalog on APIs.io includes 1 Spectral governance ruleset.

SoundStat’s developer surface includes authentication, documentation, signup flow, and 11 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

34.1/100 thin ▬ flat Agent 25/100 agent aware Front door AI 4/6 moderate saas Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 published contract

Music Audio Analysis Audio Features RecommendationsTrack AnalysisSpotify Alternative

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Audience Measurement & Insights Management

BC-3770

Recommendations

GET /api/v1/recommendations/similar POST /api/v1/recommendations/by-features POST /api/v1/recommendations/mood

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 34.1/100 · thin

Contract Quality 10.3 / 19

Developer Ergonomics 4.5 / 15

Access Clarity 5.1 / 15

Operational Transparency 0.7 / 10

Contract Governance 1.2 / 9

Discoverability 5.0 / 8

Regulatory Posture 1.5 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 25/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 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 Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship Ask about this →
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented) Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link Ask about this →
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document Ask about this →
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented) Ask about this →

8 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Developer Ergonomics scores 29.8 — up to +14.0 composite points Ask about this →
Access Clarity scores 34.0 — up to +13.2 composite points Ask about this →
Operational Transparency scores 7.1 — up to +12.1 composite points Ask about this →

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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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 the provider profile at artifacts.apis.io/soundstat/apis.yml: open an issue on github.com/api-evangelist/soundstat to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

measured — observed by APIs.io (published)

APIs 5

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

SoundStat Genres API

The Genres API from SoundStat — 1 operation(s) for genres.

SoundStat Recommendations API

The Recommendations API from SoundStat — 15 operation(s) for recommendations.

SoundStat Stats API

The Stats API from SoundStat — 1 operation(s) for stats.

SoundStat Track API

The Track API from SoundStat — 2 operation(s) for track.

SoundStat Tracks API

The Tracks API from SoundStat — 1 operation(s) for tracks.

Open Collections 6

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

SoundStat Genres API

OPEN COLLECTION

SoundStat Genres Recommendations API

OPEN COLLECTION

SoundStat Genres Stats API

OPEN COLLECTION

SoundStat Genres Track API

OPEN COLLECTION

SoundStat Genres Tracks API

OPEN COLLECTION

SoundStat API

OPEN COLLECTION

SoundStat API pricing

Not yet checked against SoundStat's own pricing page. Compiled by API Evangelist on 2026-07-03 from soundstat.info/; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Free (Registration + Free Endpoints) free	—
Usage - up to 5,000 tracks/month usage	—
Usage - 5,000 to 15,000 tracks/month usage	—
Usage - 15,000 to 30,000 tracks/month usage	—
Usage - over 30,000 tracks/month usage	—

Plan details, limits and sources →

Rate limits

REST API Requests: not published requests
Unique Track Analysis: prepaid balance / volume bands tracks
Free Recommendation Endpoints: subject to fair-use restriction requests

Compiled by API Evangelist, not yet checked against SoundStat's documentation. Rate-limit details →

Pricing Plans 1

Published pricing tiers and plan structures.

SoundStat Plans Pricing

5 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

SoundStat Rate Limits

3 limits

RATE LIMITS

Terms of Service 1

What its API terms permit and prohibit, quoted from its own page.

SoundStat

9 quoted statements, read from SoundStat's own page on 2026-11-10.

TERMS

AI Preferences 1

Its stance on AI training, inference and agents, quoted from its own pages.

SoundStat

1 quoted statement, read from SoundStat's own page on 2026-11-10.

AI PREFS

Data License 1

How its data and outputs may be reused, quoted from its own terms.

SoundStat

2 quoted statements, read from SoundStat's own page on 2026-11-10.

LICENSE

FinOps 1

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

SoundStat Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

SoundStat API Rules

61 rules · 54 error-severity 6 warn-severity 1 info-severity

SPECTRAL

Security Posture 2

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

SoundStat Authentication

apiKey · 1 scheme

SECURITY

SoundStat Domain Security

TLSv1.3 · DMARC

SECURITY

Agentic Access (API Evangelist recommendations) 1

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

SoundStat Agentic Access

20 operations

20 operations · 0 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

AIPreferences

AIPreferences

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

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 5

Pricing, plans, and the legal terms of use

TermsOfService

Plans

FinOps

UsageTerms

DataLicense

Company 1

The organization behind the API

Website

Website

Other 1

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Source (apis.yml)

aid: soundstat
url: https://raw.githubusercontent.com/api-evangelist/soundstat/refs/heads/main/apis.yml
name: SoundStat
kind: company
description: SoundStat is an independent audio analysis API that returns detailed per-track features - tempo (BPM), key, mode,
  energy, danceability, valence, instrumentalness, acousticness, loudness, plus segment and beat structure - for music tracks
  referenced by Spotify track ID. Launched in early 2025 as an alternative after Spotify deprecated its public audio-features
  and recommendations endpoints, SoundStat has analyzed several million tracks and layers a rich recommendation engine (similar,
  feature-target, mixed-seed, mood, activity, time-of-day, cross-genre, DJ-compatible, contrast, hidden-gems, and more) plus
  genre-and-feature search on top of its analysis corpus. The REST API is authenticated with an x-api-key header and billed
  per unique track analyzed.
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: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-13'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/soundstat.png
tags:
- Music
- Audio Analysis
- Audio Features
- Recommendations
- Track Analysis
- Spotify Alternative
created: '2026-07-03'
modified: '2026-07-03'
specificationVersion: '0.23'
apis:
- aid: soundstat:soundstat-genres-api
  name: SoundStat Genres API
  description: The Genres API from SoundStat — 1 operation(s) for genres.
  humanURL: https://soundstat.info/api/v1/docs
  baseURL: https://soundstat.info/api/v1
  tags:
  - Genres
  properties:
  - type: OpenAPI
    url: openapi/soundstat-genres-api-openapi.yml
  - type: Documentation
    url: https://soundstat.info/api/v1/docs
  - type: APIReference
    url: https://soundstat.info/api/v1/docs
  - type: PostmanCollection
    url: collections/soundstat.postman_collection.json
  - type: OpenCollection
    url: collections/soundstat.opencollection.json
  - type: Documentation
    url: https://soundstat.info/article/New-Horizons-in-Music-Recommendations.html
- aid: soundstat:soundstat-recommendations-api
  name: SoundStat Recommendations API
  description: The Recommendations API from SoundStat — 15 operation(s) for recommendations.
  humanURL: https://soundstat.info/api/v1/docs
  baseURL: https://soundstat.info/api/v1
  tags:
  - Recommendations
  properties:
  - type: OpenAPI
    url: openapi/soundstat-recommendations-api-openapi.yml
  - type: Documentation
    url: https://soundstat.info/api/v1/docs
  - type: APIReference
    url: https://soundstat.info/api/v1/docs
  - type: PostmanCollection
    url: collections/soundstat.postman_collection.json
  - type: OpenCollection
    url: collections/soundstat.opencollection.json
  - type: Documentation
    url: https://soundstat.info/article/New-Horizons-in-Music-Recommendations.html
- aid: soundstat:soundstat-stats-api
  name: SoundStat Stats API
  description: The Stats API from SoundStat — 1 operation(s) for stats.
  humanURL: https://soundstat.info/api/v1/docs
  baseURL: https://soundstat.info/api/v1
  tags:
  - Stats
  properties:
  - type: OpenAPI
    url: openapi/soundstat-stats-api-openapi.yml
  - type: Documentation
    url: https://soundstat.info/api/v1/docs
  - type: APIReference
    url: https://soundstat.info/api/v1/docs
  - type: PostmanCollection
    url: collections/soundstat.postman_collection.json
  - type: OpenCollection
    url: collections/soundstat.opencollection.json
  - type: Documentation
    url: https://soundstat.info/article/New-Horizons-in-Music-Recommendations.html
- aid: soundstat:soundstat-track-api
  name: SoundStat Track API
  description: The Track API from SoundStat — 2 operation(s) for track.
  humanURL: https://soundstat.info/api/v1/docs
  baseURL: https://soundstat.info/api/v1
  tags:
  - Track
  properties:
  - type: OpenAPI
    url: openapi/soundstat-track-api-openapi.yml
  - type: Documentation
    url: https://soundstat.info/api/v1/docs
  - type: APIReference
    url: https://soundstat.info/api/v1/docs
  - type: PostmanCollection
    url: collections/soundstat.postman_collection.json
  - type: OpenCollection
    url: collections/soundstat.opencollection.json
  - type: Documentation
    url: https://soundstat.info/article/New-Horizons-in-Music-Recommendations.html
- aid: soundstat:soundstat-tracks-api
  name: SoundStat Tracks API
  description: The Tracks API from SoundStat — 1 operation(s) for tracks.
  humanURL: https://soundstat.info/api/v1/docs
  baseURL: https://soundstat.info/api/v1
  tags:
  - Tracks
  properties:
  - type: OpenAPI
    url: openapi/soundstat-tracks-api-openapi.yml
  - type: Documentation
    url: https://soundstat.info/api/v1/docs
  - type: APIReference
    url: https://soundstat.info/api/v1/docs
  - type: PostmanCollection
    url: collections/soundstat.postman_collection.json
  - type: OpenCollection
    url: collections/soundstat.opencollection.json
  - type: Documentation
    url: https://soundstat.info/article/New-Horizons-in-Music-Recommendations.html
common:
- type: CapabilityMap
  url: capabilities/soundstat-capability-edges.yml
  name: SoundStat Business Capability Map
- type: AgenticAccess
  url: agentic-access/soundstat-agentic-access.yml
- type: DomainSecurity
  url: security/soundstat-domain-security.yml
- type: Authentication
  url: authentication/soundstat-authentication.yml
- type: Website
  url: https://soundstat.info
- type: Documentation
  url: https://soundstat.info/api/v1/docs
- type: SignUp
  url: https://soundstat.info/auth.html
- type: TermsOfService
  url: https://soundstat.info/terms.html
- type: Plans
  url: plans/soundstat-plans-pricing.yml
- type: RateLimits
  url: rate-limits/soundstat-rate-limits.yml
- type: FinOps
  url: finops/soundstat-finops.yml
- type: UsageTerms
  url: terms/soundstat-terms-of-service.yml
- type: AIPreferences
  url: ai-preferences/soundstat-ai-preferences.yml
- type: DataLicense
  url: data-license/soundstat-data-license.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

SoundStat API — frequently asked questions

Does SoundStat have an API?

Yes. APIs.io lists 5 APIs from SoundStat, including SoundStat Genres API, SoundStat Recommendations API and SoundStat Stats API, and 2 more.

Is there an OpenAPI specification for the SoundStat API?

Yes. APIs.io indexes 5 OpenAPI specifications for SoundStat, each linked for download from this page.

How do I authenticate with the SoundStat API?

SoundStat uses bearer-token authentication (apiKey · 1 scheme). The details are profiled on APIs.io as SoundStat Authentication.

How much does the SoundStat API cost?

APIs.io lists 5 pricing plans for SoundStat, with each plan's price, limits and inclusions under Pricing on this page.

Is the SoundStat API ready for AI agents?

SoundStat has a Kin Score of 34.1 out of 100 (thin) and an Agent Readiness score of 25.3 (agent-aware), scored by API Evangelist on 2026-11-13.

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