SoundHound

SoundHound AI is a voice AI and audio intelligence platform offering the Houndify conversational voice assistant API and a music fingerprint identification API. Developers can build voice-enabled applications using HTTP and WebSocket endpoints that accept audio or text queries and return structured JSON, powered by SoundHound's proprietary Speech-to-Meaning and Deep Meaning Understanding technologies.

SoundHound is listed with 2 APIs on the APIs.io network. Tagged areas include Voice AI, Conversational AI, Music Recognition, Audio Intelligence, and Speech Recognition.

SoundHound’s developer surface includes engineering blog, GitHub presence, signup flow, and 16 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

20.2/100 emerging ▬ flat Agent 3/100 human only Front door AI 6/6 dominant Heartbeat 2/100 dormant saas Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemium

2 APIs

Voice AI Conversational AI Music RecognitionAudio IntelligenceSpeech Recognition Natural Language Processing Music

Kin Score

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

Composite quality — 20.2/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 5.3 / 17

Access Clarity 5.8 / 17

Operational Transparency 2.1 / 11

Contract Governance 0.0 / 10

Discoverability 5.8 / 9

Regulatory Posture 0.6 / 15

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 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 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 AI & Biometrics 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 could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% 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):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document Ask about this →
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 →
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author Ask about this →
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey) 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 →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →

12 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 0.0 — up to +25.0 composite points Ask about this →
Developer Ergonomics scores 31.0 — up to +13.8 composite points Ask about this →
Access Clarity scores 34.0 — up to +13.2 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/soundhound/apis.yml: open an issue on github.com/api-evangelist/soundhound 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 →

APIs 2

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

Houndify Voice AI API

The Houndify platform provides HTTP and WebSocket APIs that accept text or audio queries and return actionable JSON responses. Built on SoundHound's Speech-to-Meaning and Deep M...

SoundHound Music Fingerprint Identification API

A high-accuracy music recognition API capable of identifying copyrighted music from as little as 2 to 10 seconds of audio with sub-second latency for streamed requests. Designed...

SoundHound API pricing

Not yet checked against SoundHound's own pricing page. Compiled by API Evangelist on 2026-06-13; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Developer (Free)	Free per month
Commercial	—

Plan details, limits and sources →

Pricing Plans 2

Published pricing tiers and plan structures.

Houndify Voice Ai

2 plans

PLANS

Music Id

2 plans

PLANS

Rate Limits 2

Documented rate limits and quota policies.

Houndify Voice Ai

0 limits

RATE LIMITS

Music Id

0 limits

RATE LIMITS

Terms of Service 1

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

SoundHound

12 quoted statements, read from SoundHound's own page on 2026-11-10.

TERMS

Eligibility 1

Who may sign up and where, quoted from its own terms.

SoundHound

5 quoted statements, read from SoundHound's own page on 2026-11-10.

ELIGIBILITY

AI Preferences 1

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

SoundHound

3 quoted statements, read from SoundHound'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.

SoundHound

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

LICENSE

FinOps 1

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

Soundhound

FINOPS

Security Posture 1

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

SoundHound Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

Signup

Signup

Login

Documentation 1

Reference material describing how the API behaves

AIPreferences

AIPreferences

Build 1

SDKs, sample code, and the tooling you integrate with

GitHub

GitHub

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 3

Status, limits, changes, and where to get help

RateLimits

RateLimits

Contact

Contact

StatusPage

StatusPage

Commercial 5

Pricing, plans, and the legal terms of use

Plans

TermsOfService

FinOps

UsageTerms

DataLicense

Company 4

The organization behind the API

Website

Website

Blog

Blog

Newsroom

Newsroom

InvestorRelations

InvestorRelations

Other 2

Properties that don't map to a standard resource type

Developer Platform

Developer Platform

Eligibility

Eligibility

Source (apis.yml)

name: SoundHound
description: SoundHound AI is a voice AI and audio intelligence platform offering the Houndify conversational voice assistant
  API and a music fingerprint identification API. Developers can build voice-enabled applications using HTTP and WebSocket
  endpoints that accept audio or text queries and return structured JSON, powered by SoundHound's proprietary Speech-to-Meaning
  and Deep Meaning Understanding technologies.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: low
  source:
  - plans
  - security
  generated: '2026-11-13'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/soundhound.png
url: https://raw.githubusercontent.com/api-evangelist/soundhound/refs/heads/main/apis.yml
created: '2026-06-13'
modified: '2026-09-16'
specificationVersion: '0.23'
tags:
- Voice AI
- Conversational AI
- Music Recognition
- Audio Intelligence
- Speech Recognition
- Natural Language Processing
- Music
apis:
- name: Houndify Voice AI API
  description: The Houndify platform provides HTTP and WebSocket APIs that accept text or audio queries and return actionable
    JSON responses. Built on SoundHound's Speech-to-Meaning and Deep Meaning Understanding technologies, it enables developers
    to build context-aware conversational voice assistants with support for multiple languages, conversation state management,
    and real-time partial transcripts.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.soundhound.com/voice-ai-products/developer/
  baseURL: https://api.houndify.com
  tags:
  - Voice AI
  - Conversational AI
  - Speech Recognition
  - Natural Language Processing
  - Text Query
  - Audio Query
  properties:
  - type: Documentation
    url: https://www.soundhound.com/voice-ai-products/developer/
  - type: GettingStarted
    url: https://www.soundhound.com/voice-ai-products/developer/
  - type: SDKs
    url: https://github.com/soundhound
  - type: GitHubOrganization
    url: https://github.com/soundhound
  - type: PythonSDK
    url: https://pypi.org/project/Houndify/
  - type: GoSDK
    url: https://github.com/soundhound/houndify-sdk-go
  - type: iOSSDK
    url: https://github.com/soundhound/houndify-sdk-ios
  - type: WebSDKExample
    url: https://github.com/soundhound/hound-sdk-web-example
  - type: TermsOfService
    url: https://www.houndify.com/terms
  - type: Signup
    url: https://www.houndify.com/signup
  - type: Login
    url: https://www.houndify.com/login
  - type: Plans
    url: https://raw.githubusercontent.com/api-evangelist/soundhound/refs/heads/main/plans/houndify-voice-ai.yml
  - type: RateLimits
    url: https://raw.githubusercontent.com/api-evangelist/soundhound/refs/heads/main/rate-limits/houndify-voice-ai.yml
  contact:
  - FN: SoundHound Developer Platform
    url: https://www.soundhound.com/contact/
    email: ''
- name: SoundHound Music Fingerprint Identification API
  description: A high-accuracy music recognition API capable of identifying copyrighted music from as little as 2 to 10 seconds
    of audio with sub-second latency for streamed requests. Designed for enterprise integration with built-in noise robustness
    and minimal audio data requirements, the API delivers fast and reliable music identification for applications requiring
    audio intelligence.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.soundhound.com/soundhound-music-id-one-sheet/
  baseURL: https://api.soundhound.com
  tags:
  - Music Recognition
  - Audio Intelligence
  - Audio Fingerprinting
  - Music Identification
  - Content Recognition
  properties:
  - type: Documentation
    url: https://www.soundhound.com/voice-ai-products/developer/
  - type: ProductOverview
    url: https://www.soundhound.com/soundhound-music-id-one-sheet/
  - type: Contact
    url: https://www.soundhound.com/contact/
  - type: Plans
    url: https://raw.githubusercontent.com/api-evangelist/soundhound/refs/heads/main/plans/music-id.yml
  - type: RateLimits
    url: https://raw.githubusercontent.com/api-evangelist/soundhound/refs/heads/main/rate-limits/music-id.yml
  contact:
  - FN: SoundHound Music API Sales
    url: https://www.soundhound.com/contact/
    email: ''
common:
- type: Plans
  url: plans/houndify-voice-ai.yml
- type: RateLimits
  url: rate-limits/houndify-voice-ai.yml
- type: Website
  url: https://soundhound.com
- type: DomainSecurity
  url: security/soundhound-domain-security.yml
- type: Developer Platform
  url: https://www.soundhound.com/voice-ai-products/developer/
- type: Blog
  url: https://www.soundhound.com/voice-ai-resources/
- type: Newsroom
  url: https://www.soundhound.com/newsroom/press-releases/
- type: GitHub
  url: https://github.com/soundhound
- type: TermsOfService
  url: https://www.houndify.com/terms
- type: Contact
  url: https://www.soundhound.com/contact/
- type: Signup
  url: https://www.houndify.com/signup
- type: Login
  url: https://www.houndify.com/login
- type: StatusPage
  url: https://www.saashub.com/soundhound-status
- type: InvestorRelations
  url: https://investors.soundhound.com/news-releases
- type: FinOps
  url: https://raw.githubusercontent.com/api-evangelist/soundhound/refs/heads/main/finops/soundhound.yml
- type: UsageTerms
  url: terms/soundhound-terms-of-service.yml
- type: Eligibility
  url: eligibility/soundhound-eligibility.yml
- type: AIPreferences
  url: ai-preferences/soundhound-ai-preferences.yml
- type: DataLicense
  url: data-license/soundhound-data-license.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

SoundHound API — frequently asked questions

Does SoundHound have an API?

Yes. APIs.io lists 2 APIs from SoundHound, including Houndify Voice AI API and SoundHound Music Fingerprint Identification API.

How much does the SoundHound API cost?

APIs.io lists 4 pricing plans for SoundHound, with each plan's price, limits and inclusions under Pricing on this page.

Is the SoundHound API ready for AI agents?

SoundHound has a Kin Score of 20.2 out of 100 (emerging) and an Agent Readiness score of 2.5 (human-only), scored by API Evangelist on 2026-11-13.

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