Hume AI

Hume AI builds empathic voice and emotional AI models. The platform exposes four published APIs: Voices, Octave Text-to-Speech, Empathic Voice Interface (EVI / speech-to-speech), and Expression Measurement (multimodal emotion analysis). REST + WebSocket interfaces are documented with public OpenAPI and AsyncAPI specifications at https://dev.hume.ai/.

Hume AI publishes 10 APIs on the APIs.io network, including Ai Default API, subpackage_batch API, subpackage_chatGroups API, and 7 more. Tagged areas include Artificial Intelligence, Voice, Empathic, Emotion, and Multi-Modal.

The Hume AI catalog on APIs.io includes 1 event-driven AsyncAPI specification and 1 Spectral governance ruleset.

Hume AI’s developer surface includes authentication, documentation, engineering blog, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub

34.6/100 thin ▬ flat Agent 30/100 agent ready saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessFreemiumSelf serve⚡ Free to try

4 APIs

Artificial Intelligence VoiceEmpathicEmotionMulti-Modal

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 34.6/100 · thin

Contract Quality 13.6 / 23

Developer Ergonomics 4.3 / 18

Access Clarity 4.7 / 18

Operational Transparency 1.2 / 12

Contract Governance 1.2 / 11

Discoverability 6.7 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 30/100 · agent ready

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 6 / 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

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.

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/hume-ai: 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 →

APIs 10

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

Hume AI Ai Default API

The Ai Default API from Hume AI — 6 operation(s) for ai default.

Hume AI subpackage_batch API

The subpackage_batch API from Hume AI — 4 operation(s) for subpackage_batch.

Hume AI subpackage_chatGroups API

The subpackage_chatGroups API from Hume AI — 4 operation(s) for subpackage_chatgroups.

Hume AI subpackage_chats API

The subpackage_chats API from Hume AI — 3 operation(s) for subpackage_chats.

Hume AI subpackage_configs API

The subpackage_configs API from Hume AI — 3 operation(s) for subpackage_configs.

Hume AI subpackage_controlPlane API

The subpackage_controlPlane API from Hume AI — 1 operation(s) for subpackage_controlplane.

Hume AI subpackage_prompts API

The subpackage_prompts API from Hume AI — 3 operation(s) for subpackage_prompts.

Hume AI subpackage_tools API

The subpackage_tools API from Hume AI — 3 operation(s) for subpackage_tools.

Hume AI subpackage_voices API

The subpackage_voices API from Hume AI — 1 operation(s) for subpackage_voices.

Hume AI Speech To Speech (EVI) API

The Speech To Speech (EVI) API from Hume AI — 0 operation(s) for speech to speech (evi).

Scroll for all 10

Open Collections 14

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

API Collection

OPEN COLLECTION

Speech-to-speech (EVI) API

OPEN COLLECTION

Speech-to-speech (EVI)

OPEN COLLECTION

Expression Measurement API

OPEN COLLECTION

Speech-to-speech (EVI) subpackage_batch API

OPEN COLLECTION

Speech-to-speech (EVI) subpackage_chatGroups API

OPEN COLLECTION

Speech-to-speech (EVI) subpackage_chats API

OPEN COLLECTION

Speech-to-speech (EVI) subpackage_configs API

OPEN COLLECTION

Speech-to-speech (EVI) subpackage_controlPlane API

OPEN COLLECTION

Speech-to-speech (EVI) subpackage_prompts API

OPEN COLLECTION

Speech-to-speech (EVI) subpackage_tools API

OPEN COLLECTION

Speech-to-speech (EVI) subpackage_voices API

OPEN COLLECTION

Text-to-Speech (TTS)

OPEN COLLECTION

Voices

OPEN COLLECTION

Scroll for all 14

Pricing Plans 1

Published pricing tiers and plan structures.

Hume Ai Plans Pricing

8 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Hume Ai Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Hume Ai Finops

FINOPS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Hume AI WebSocket APIs

Consolidated AsyncAPI definition for Hume AI's two production WebSocket surfaces: - **Empathic Voice Interface (EVI)** — bidirectional speech-to-speech voice conversation at `ws...

ASYNCAPI

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Hume AI API Rules

8 rules · 1 errors 7 warnings

SPECTRAL

Security Posture 2

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

Hume Ai Authentication

apiKey · 1 scheme

SECURITY

Hume Ai Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Hume Ai Agentic Access

49 operations · 28 acting · 1 human-in-the-loop

49 operations · 28 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

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 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Source (apis.yml)

aid: hume-ai
url: https://raw.githubusercontent.com/api-evangelist/hume-ai/refs/heads/main/apis.yml
name: Hume AI
kind: company
description: 'Hume AI builds empathic voice and emotional AI models. The platform exposes four published APIs: Voices, Octave
  Text-to-Speech, Empathic Voice Interface (EVI / speech-to-speech), and Expression Measurement (multimodal emotion analysis).
  REST + WebSocket interfaces are documented with public OpenAPI and AsyncAPI specifications at https://dev.hume.ai/.'
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
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/hume-ai.png
tags:
- Artificial Intelligence
- Voice
- Empathic
- Emotion
- Multi-Modal
tags_raw:
- AI
- Voice
- Empathic
- Emotion
- Multimodal
created: '2026-05-08'
modified: '2026-05-29'
specificationVersion: '0.23'
apis:
- aid: hume-ai:hume-ai-default-api
  name: Hume AI Ai Default API
  description: The Ai Default API from Hume AI — 6 operation(s) for ai default.
  humanURL: https://dev.hume.ai/reference
  baseURL: https://api.hume.ai
  tags:
  - Ai Default
  properties:
  - type: OpenAPI
    url: openapi/hume-ai-default-api-openapi.yml
  - type: Documentation
    url: https://dev.hume.ai/reference
  - type: Documentation
    url: https://dev.hume.ai/docs/text-to-speech-tts
  - type: Pricing
    url: https://www.hume.ai/pricing
  - type: Documentation
    url: https://dev.hume.ai/docs/speech-to-speech-evi
  - type: AsyncAPI
    url: https://dev.hume.ai/asyncapi.yaml
  - type: AsyncAPI
    url: asyncapi/hume-ai-asyncapi.yml
  - type: Documentation
    url: https://dev.hume.ai/docs/expression-measurement
- aid: hume-ai:hume-ai-subpackage-batch-api
  name: Hume AI subpackage_batch API
  description: The subpackage_batch API from Hume AI — 4 operation(s) for subpackage_batch.
  humanURL: https://dev.hume.ai/reference
  baseURL: https://api.hume.ai
  tags: []
  tags_raw:
  - subpackage_batch
  properties:
  - type: OpenAPI
    url: openapi/hume-ai-subpackage-batch-api-openapi.yml
  - type: Documentation
    url: https://dev.hume.ai/reference
  - type: Documentation
    url: https://dev.hume.ai/docs/text-to-speech-tts
  - type: Pricing
    url: https://www.hume.ai/pricing
  - type: Documentation
    url: https://dev.hume.ai/docs/speech-to-speech-evi
  - type: AsyncAPI
    url: https://dev.hume.ai/asyncapi.yaml
  - type: AsyncAPI
    url: asyncapi/hume-ai-asyncapi.yml
  - type: Documentation
    url: https://dev.hume.ai/docs/expression-measurement
- aid: hume-ai:hume-ai-subpackage-chatgroups-api
  name: Hume AI subpackage_chatGroups API
  description: The subpackage_chatGroups API from Hume AI — 4 operation(s) for subpackage_chatgroups.
  humanURL: https://dev.hume.ai/reference
  baseURL: https://api.hume.ai
  tags:
  - subpackage_chatGroups
  properties:
  - type: OpenAPI
    url: openapi/hume-ai-subpackage-chatgroups-api-openapi.yml
  - type: Documentation
    url: https://dev.hume.ai/reference
  - type: Documentation
    url: https://dev.hume.ai/docs/text-to-speech-tts
  - type: Pricing
    url: https://www.hume.ai/pricing
  - type: Documentation
    url: https://dev.hume.ai/docs/speech-to-speech-evi
  - type: AsyncAPI
    url: https://dev.hume.ai/asyncapi.yaml
  - type: AsyncAPI
    url: asyncapi/hume-ai-asyncapi.yml
  - type: Documentation
    url: https://dev.hume.ai/docs/expression-measurement
- aid: hume-ai:hume-ai-subpackage-chats-api
  name: Hume AI subpackage_chats API
  description: The subpackage_chats API from Hume AI — 3 operation(s) for subpackage_chats.
  humanURL: https://dev.hume.ai/reference
  baseURL: https://api.hume.ai
  tags: []
  tags_raw:
  - subpackage_chats
  properties:
  - type: OpenAPI
    url: openapi/hume-ai-subpackage-chats-api-openapi.yml
  - type: Documentation
    url: https://dev.hume.ai/reference
  - type: Documentation
    url: https://dev.hume.ai/docs/text-to-speech-tts
  - type: Pricing
    url: https://www.hume.ai/pricing
  - type: Documentation
    url: https://dev.hume.ai/docs/speech-to-speech-evi
  - type: AsyncAPI
    url: https://dev.hume.ai/asyncapi.yaml
  - type: AsyncAPI
    url: asyncapi/hume-ai-asyncapi.yml
  - type: Documentation
    url: https://dev.hume.ai/docs/expression-measurement
- aid: hume-ai:hume-ai-subpackage-configs-api
  name: Hume AI subpackage_configs API
  description: The subpackage_configs API from Hume AI — 3 operation(s) for subpackage_configs.
  humanURL: https://dev.hume.ai/reference
  baseURL: https://api.hume.ai
  tags: []
  tags_raw:
  - subpackage_configs
  properties:
  - type: OpenAPI
    url: openapi/hume-ai-subpackage-configs-api-openapi.yml
  - type: Documentation
    url: https://dev.hume.ai/reference
  - type: Documentation
    url: https://dev.hume.ai/docs/text-to-speech-tts
  - type: Pricing
    url: https://www.hume.ai/pricing
  - type: Documentation
    url: https://dev.hume.ai/docs/speech-to-speech-evi
  - type: AsyncAPI
    url: https://dev.hume.ai/asyncapi.yaml
  - type: AsyncAPI
    url: asyncapi/hume-ai-asyncapi.yml
  - type: Documentation
    url: https://dev.hume.ai/docs/expression-measurement
- aid: hume-ai:hume-ai-subpackage-controlplane-api
  name: Hume AI subpackage_controlPlane API
  description: The subpackage_controlPlane API from Hume AI — 1 operation(s) for subpackage_controlplane.
  humanURL: https://dev.hume.ai/reference
  baseURL: https://api.hume.ai
  tags:
  - subpackage_controlPlane
  properties:
  - type: OpenAPI
    url: openapi/hume-ai-subpackage-controlplane-api-openapi.yml
  - type: Documentation
    url: https://dev.hume.ai/reference
  - type: Documentation
    url: https://dev.hume.ai/docs/text-to-speech-tts
  - type: Pricing
    url: https://www.hume.ai/pricing
  - type: Documentation
    url: https://dev.hume.ai/docs/speech-to-speech-evi
  - type: AsyncAPI
    url: https://dev.hume.ai/asyncapi.yaml
  - type: AsyncAPI
    url: asyncapi/hume-ai-asyncapi.yml
  - type: Documentation
    url: https://dev.hume.ai/docs/expression-measurement
- aid: hume-ai:hume-ai-subpackage-prompts-api
  name: Hume AI subpackage_prompts API
  description: The subpackage_prompts API from Hume AI — 3 operation(s) for subpackage_prompts.
  humanURL: https://dev.hume.ai/reference
  baseURL: https://api.hume.ai
  tags: []
  tags_raw:
  - subpackage_prompts
  properties:
  - type: OpenAPI
    url: openapi/hume-ai-subpackage-prompts-api-openapi.yml
  - type: Documentation
    url: https://dev.hume.ai/reference
  - type: Documentation
    url: https://dev.hume.ai/docs/text-to-speech-tts
  - type: Pricing
    url: https://www.hume.ai/pricing
  - type: Documentation
    url: https://dev.hume.ai/docs/speech-to-speech-evi
  - type: AsyncAPI
    url: https://dev.hume.ai/asyncapi.yaml
  - type: AsyncAPI
    url: asyncapi/hume-ai-asyncapi.yml
  - type: Documentation
    url: https://dev.hume.ai/docs/expression-measurement
- aid: hume-ai:hume-ai-subpackage-tools-api
  name: Hume AI subpackage_tools API
  description: The subpackage_tools API from Hume AI — 3 operation(s) for subpackage_tools.
  humanURL: https://dev.hume.ai/reference
  baseURL: https://api.hume.ai
  tags: []
  tags_raw:
  - subpackage_tools
  properties:
  - type: OpenAPI
    url: openapi/hume-ai-subpackage-tools-api-openapi.yml
  - type: Documentation
    url: https://dev.hume.ai/reference
  - type: Documentation
    url: https://dev.hume.ai/docs/text-to-speech-tts
  - type: Pricing
    url: https://www.hume.ai/pricing
  - type: Documentation
    url: https://dev.hume.ai/docs/speech-to-speech-evi
  - type: AsyncAPI
    url: https://dev.hume.ai/asyncapi.yaml
  - type: AsyncAPI
    url: asyncapi/hume-ai-asyncapi.yml
  - type: Documentation
    url: https://dev.hume.ai/docs/expression-measurement
- aid: hume-ai:hume-ai-subpackage-voices-api
  name: Hume AI subpackage_voices API
  description: The subpackage_voices API from Hume AI — 1 operation(s) for subpackage_voices.
  humanURL: https://dev.hume.ai/reference
  baseURL: https://api.hume.ai
  tags: []
  tags_raw:
  - subpackage_voices
  properties:
  - type: OpenAPI
    url: openapi/hume-ai-subpackage-voices-api-openapi.yml
  - type: Documentation
    url: https://dev.hume.ai/reference
  - type: Documentation
    url: https://dev.hume.ai/docs/text-to-speech-tts
  - type: Pricing
    url: https://www.hume.ai/pricing
  - type: Documentation
    url: https://dev.hume.ai/docs/speech-to-speech-evi
  - type: AsyncAPI
    url: https://dev.hume.ai/asyncapi.yaml
  - type: AsyncAPI
    url: asyncapi/hume-ai-asyncapi.yml
  - type: Documentation
    url: https://dev.hume.ai/docs/expression-measurement
- aid: hume-ai:hume-ai-speech-to-speech-evi-api
  name: Hume AI Speech To Speech (EVI) API
  description: The Speech To Speech (EVI) API from Hume AI — 0 operation(s) for speech to speech (evi).
  humanURL: https://dev.hume.ai/reference
  baseURL: https://api.hume.ai
  tags:
  - Speech To Speech (EVI)
  properties:
  - type: OpenAPI
    url: openapi/hume-ai-speech-to-speech-evi-api-openapi.yml
common:
- type: AgenticAccess
  url: agentic-access/hume-ai-agentic-access.yml
- type: DomainSecurity
  url: security/hume-ai-domain-security.yml
- type: Authentication
  url: authentication/hume-ai-authentication.yml
- type: GitHubOrganization
  url: https://github.com/HumeAI
- type: LinkedIn
  url: https://www.linkedin.com/company/hume-ai
- type: Website
  url: https://www.hume.ai/
- type: Documentation
  url: https://dev.hume.ai/
- type: Plans
  url: plans/hume-ai-plans-pricing.yml
- type: RateLimits
  url: rate-limits/hume-ai-rate-limits.yml
- type: FinOps
  url: finops/hume-ai-finops.yml
- url: https://www.hume.ai/blog
  type: Blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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