Soul Machines

Soul Machines builds autonomously animated "Digital People" — AI-driven interactive avatars that combine a real-time facial/gesture animation engine with conversational AI so brands can deploy human-like agents for customer experience, sales, education, and health. Developers integrate Digital People through the Web SDK (a JavaScript library that renders and drives a Digital Person in the browser over a WebSocket session to the dh.soulmachines.cloud session server) and the Skills API (a REST/callback contract for building web services that supply the conversational responses a Digital Person speaks). Personas, API keys, and content are configured in DDNA Studio. Soul Machines was founded in Auckland, New Zealand and is a portfolio company of the SoftBank Vision Fund.

Soul Machines publishes 2 APIs on the APIs.io network. Tagged areas include Company, Enterprise, Artificial Intelligence, Digital Humans, and Avatars.

The Soul Machines catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Soul Machines’ developer surface includes documentation, API reference, getting-started guide, support, pricing, signup flow, authentication, and 17 more developer resources.

🌐 Visit website 📡 Source on GitHub

35.6/100 thin ▬ flat Agent 28/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessSelf serve

2 APIs 1 MCP Servers

Company Enterprise Artificial Intelligence Digital Humans Avatars Conversational AI Customer Experience SDK Web SDK

Kin Score

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

Composite quality — 35.6/100 · thin

Contract Quality 10.4 / 25

Developer Ergonomics 4.8 / 20

Access Clarity 9.5 / 20

Operational Transparency 3.4 / 13

Contract Governance 0.0 / 12

Discoverability 7.6 / 10

Agent readiness — 28/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 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 0 / 7

Rate-Limit Signaling 0 / 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 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.

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/soul-machines: 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 2

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

Soul Machines Digital Person Session

Real-time WebSocket session API used by the Web SDK to connect a browser client to a Digital Person running on the Soul Machines session server. A session is authenticated with ...

Soul Machines Skills API

REST/callback contract for building web services ("skills") that respond to a Digital Person's conversational user input — NLP-adapter skills, intent matching, and pre/post proc...

MCP Servers 1

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

Soul Machines MCP Server

MCP SERVER

Event Specifications 1

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

Soul Machines Skills Webhooks

ASYNCAPI

Security Posture 2

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

Soul Machines Authentication

apiKey/oauth2 · 2 schemes

SECURITY

Soul Machines Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

MCPServer

MCPServer

LLMsTxt

LLMsTxt

Design & Contract 4

Pagination, idempotency, versioning, errors, and events

Conventions

Components

Lifecycle

Webhooks

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

SDKs

SDKs

Access & Security 4

Authentication, authorization, and security posture

DomainSecurity

TrustCenter

Compliance

Authentication

Operate 2

Status, limits, changes, and where to get help

Support

Support

ChangeLog

ChangeLog

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: soul-machines
name: Soul Machines
description: Soul Machines builds autonomously animated "Digital People" — AI-driven interactive avatars that combine a real-time
  facial/gesture animation engine with conversational AI so brands can deploy human-like agents for customer experience, sales,
  education, and health. Developers integrate Digital People through the Web SDK (a JavaScript library that renders and drives
  a Digital Person in the browser over a WebSocket session to the dh.soulmachines.cloud session server) and the Skills API
  (a REST/callback contract for building web services that supply the conversational responses a Digital Person speaks). Personas,
  API keys, and content are configured in DDNA Studio. Soul Machines was founded in Auckland, New Zealand and is a portfolio
  company of the SoftBank Vision Fund.
url: https://raw.githubusercontent.com/api-evangelist/soul-machines/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- softbank-vision-fund
x-tier: stub
x-tier-reason: portfolio-lead
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: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
specificationVersion: '0.23'
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 10
  pass: local-v1
created: '2026-07-17'
modified: '2026-07-21'
image: https://github.com/soulmachines.png
tags:
- Company
- Enterprise
- Artificial Intelligence
- Digital Humans
- Avatars
- Conversational AI
- Customer Experience
- SDK
- Web SDK
apis:
- name: Soul Machines Digital Person Session
  description: Real-time WebSocket session API used by the Web SDK to connect a browser client to a Digital Person running
    on the Soul Machines session server. A session is authenticated with either an API key (configured in DDNA Studio) or
    a JWT issued by a token server, then drives speech, animation, camera, and content-awareness over a message-based protocol.
  humanURL: https://docs.soulmachines.com/web-sdk/
  baseURL: https://dh.soulmachines.cloud
  properties:
  - type: Documentation
    url: https://docs.soulmachines.com/web-sdk/
  - type: APIReference
    url: https://docs.soulmachines.com/web-sdk/api/
  - type: WebSocketMessageFormats
    url: https://docs.soulmachines.com/docs/websocket-message-formats
- name: Soul Machines Skills API
  description: REST/callback contract for building web services ("skills") that respond to a Digital Person's conversational
    user input — NLP-adapter skills, intent matching, and pre/post processing stages. Skills are implemented by the developer
    and registered against a persona; official Node and Python SDKs conform requests/responses to the Skill API schema.
  humanURL: https://docs.soulmachines.com/skills-api/
  baseURL: https://docs.soulmachines.com/skills-api/
  properties:
  - type: Documentation
    url: https://docs.soulmachines.com/skills-api/
  - type: APIReference
    url: https://docs.soulmachines.com/skills-api/api-reference/skill-definition
  - type: GettingStarted
    url: https://docs.soulmachines.com/skills-api/getting-started/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/soul-machines-domain-security.yml
- type: Website
  url: https://www.soulmachines.com
- type: DeveloperPortal
  url: https://docs.soulmachines.com
- type: Documentation
  url: https://docs.soulmachines.com/docs/
- type: APIReference
  url: https://docs.soulmachines.com/web-sdk/api/
- type: GettingStarted
  url: https://docs.soulmachines.com/web-sdk/
- type: Support
  url: https://support.soulmachines.com
- type: GitHubOrganization
  url: https://github.com/soulmachines
- type: Pricing
  url: https://www.soulmachines.com/studio-pricing
- type: SignUp
  url: https://workforce.soulmachines.com/auth/signup
- type: TermsOfService
  url: https://www.soulmachines.com/terms-conditions
- type: PrivacyPolicy
  url: https://www.soulmachines.com/privacy-policy
- type: TrustCenter
  url: https://www.soulmachines.com/trust-safety
- type: Compliance
  url: https://www.soulmachines.com/trust-safety
- type: Packages
  url: packages/soul-machines-packages.yml
- type: SDKs
  url: packages/soul-machines-packages.yml
- type: Authentication
  url: authentication/soul-machines-authentication.yml
- type: Conventions
  url: conventions/soul-machines-conventions.yml
- type: Components
  url: components/soul-machines-components.yml
- type: Lifecycle
  url: lifecycle/soul-machines-lifecycle.yml
- type: ChangeLog
  url: changelog/soul-machines-changelog.yml
- type: Webhooks
  url: asyncapi/soul-machines-skills-webhooks.yml
- type: MCPServer
  url: mcp/soul-machines-mcp.yml
- type: LLMsTxt
  url: llms/soul-machines-llms.txt

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