Hume AI website screenshot

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 9 APIs on the APIs.io network, including Ai Default API, subpackage_batch API, subpackage_chatGroups API, and 6 more. Tagged areas include AI, Voice, Empathic, Emotion, and Multimodal.

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
40.9/100 thin ▼ -7.7 Agent 36/100 agent ready Full breakdown ↓
scored 2026-07-28 · rubric v0.6
AccessFreemiumSelf serve⚡ Free to try
9 APIs
AIVoiceEmpathicEmotionMultimodal

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 40.9/100 · thin
Contract Quality 15.7 / 25
Developer Ergonomics 4.3 / 20
Commercial Clarity 7.9 / 20
Operational Transparency 4.8 / 13
Governance 5.0 / 12
Discoverability 7.4 / 10
Agent readiness — 36/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 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
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/hume-ai: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 9

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.

Scroll for all 9

Open Collections 4

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

Speech-to-speech (EVI)

OPEN COLLECTION

Expression Measurement API

OPEN COLLECTION

Text-to-Speech (TTS)

OPEN COLLECTION

Voices

OPEN COLLECTION

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
LinkedIn
 Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
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/.'
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/hume-ai.png
tags:
- AI
- Voice
- Empathic
- Emotion
- Multimodal
created: '2026-05-08'
modified: '2026-05-29'
specificationVersion: '0.19'
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:
  - 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:
  - 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:
  - 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:
  - 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:
  - 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:
  - 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
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