Sonde Health

Sonde Health is a Boston-based digital health company that turns short voice samples into vocal biomarkers — objective, AI-derived measures of respiratory, mental and cognitive fitness. Founded out of PureTech Health, Sonde has banked over 1,000,000 voice samples from more than 80,000 subjects to train its Health Check models. Partners integrate through the Sonde Platform Service API (a HIPAA-aligned REST API on api.sondeservices.com secured with OAuth 2.0 client-credentials and fine-grained sonde-platform/* scopes), through on-device Passive, Cued and Edge SDKs for Android and iOS, and through OEM integrations such as Qualcomm's Snapdragon Sound platform. The cloud flow is upload-and-score: register a subject, request a signed storage URL, upload a WAV sample, then create an inference job and poll for Respiratory Symptoms Risk, Mental Fitness voice-feature scores, M3/PHQ-2 questionnaire scores, or an English transcription.

Sonde Health publishes 3 API contracts indexed on the APIs.io network, including Authentication API, Platform API, and 1 more. Tagged areas include Company, Health, Healthcare, Digital Health, and Vocal Biomarkers.

The Sonde Health catalog on APIs.io includes 1 Spectral governance ruleset.

Sonde Health’s developer surface includes documentation, API reference, getting-started guide, support, engineering blog, developer portal, authentication, and 25 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

48.5/100 developing ▬ flat Agent 25/100 agent aware Front door AI 3/6 light Heartbeat 1/100 dormant saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessApproval

1 published contract 3 Agent Skills

Company Health Healthcare Digital HealthVocal BiomarkersVoice Audio Machine Learning Artificial Intelligence Mental Health Respiratory Remote Patient Monitoring Wellness HIPAA

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 48.5/100 · developing

Contract Quality 7.8 / 19

Developer Ergonomics 11.0 / 15

Access Clarity 6.3 / 15

Operational Transparency 2.6 / 10

Contract Governance 1.2 / 9

Discoverability 5.0 / 8

Regulatory Posture 5.9 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 25/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 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 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 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 Health 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
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
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)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
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)

7 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 41.6 — up to +14.6 composite points
Access Clarity scores 42.1 — up to +11.6 composite points
Contract Governance scores 13.6 — up to +10.4 composite points

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.

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/sonde-health/apis.yml: open an issue on github.com/api-evangelist/sonde-health 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Health and Wellness (consumer health, fitness, wearables)	undeclared	-	-	-
Canada Medical Device Licensing (Health Canada MDALL licence holders, incl. SaMD)	undeclared	-	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 2

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)

OAuth 2.0

measured — observed by APIs.io (declared)

APIs 3

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

Sonde Platform Service API

The Sonde Platform Service API lets partners run Sonde Vocal Biomarker Health Checks from their own mobile, web and embedded applications. Services cover user registration (User...

Sonde Health Authentication API

The Authentication API from Sonde Health — 1 operation(s) for authentication.

Sonde Health Platform API

The Platform API from Sonde Health — 1 operation(s) for platform.

Agent Skills 3

Packaged agent skills for driving this provider's APIs from an AI assistant.

sonde-health-mental-fitness-voice-features

AGENT SKILL

sonde-health-respiratory-symptoms-risk

AGENT SKILL

sonde-health-screening-results-report

AGENT SKILL

Sonde Health API pricing

Pricing Plans 1

Published pricing tiers and plan structures.

Sonde Health Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Sonde Health Rate Limits

0 limits

RATE LIMITS

FinOps 1

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

Sonde Health Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Sonde Health API Rules

47 rules · 45 errors 1 warnings 1 info

SPECTRAL

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Sonde Health Screening Api Overlay

6 actions · servers · sonde-health-screening-api-openapi.yaml

DERIVED

Security Posture 2

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

Sonde Health Authentication

oauth2/apiKey · 1 scheme

SECURITY

Sonde Health Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Sonde Health Scopes

17 scopes · clientCredentials

17 scopes

SCOPES

Resources

Get Started 5

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Login

Portal

Portal

Sandbox

Sandbox

Documentation 3

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

OpenAPI

OpenAPI

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgentSkill

AgentSkill

LLMsTxt

LLMsTxt

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

ErrorCatalog

Conventions

Lifecycle

Conformance

DataModel

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

Authentication

OAuthScopes

Compliance

DomainSecurity

Operate 4

Status, limits, changes, and where to get help

Support

Deprecation

ChangeLog

RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Plans

Plans

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: sonde-health
name: Sonde Health
description: 'Sonde Health is a Boston-based digital health company that turns short voice samples into vocal biomarkers —
  objective, AI-derived measures of respiratory, mental and cognitive fitness. Founded out of PureTech Health, Sonde has banked
  over 1,000,000 voice samples from more than 80,000 subjects to train its Health Check models. Partners integrate through
  the Sonde Platform Service API (a HIPAA-aligned REST API on api.sondeservices.com secured with OAuth 2.0 client-credentials
  and fine-grained sonde-platform/* scopes), through on-device Passive, Cued and Edge SDKs for Android and iOS, and through
  OEM integrations such as Qualcomm''s Snapdragon Sound platform. The cloud flow is upload-and-score: register a subject,
  request a signed storage URL, upload a WAV sample, then create an inference job and poll for Respiratory Symptoms Risk,
  Mental Fitness voice-feature scores, M3/PHQ-2 questionnaire scores, or an English transcription.'
url: https://raw.githubusercontent.com/api-evangelist/sonde-health/refs/heads/main/apis.yml
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: approval
  trial: false
  try_now: false
  public: false
  label: Requires approval
  confidence: medium
  source:
  - plans
  - authentication
  - scopes
  - rate-limits
  - security
  - sandbox
  generated: '2026-11-06'
  method: derived
image: http://static1.squarespace.com/static/5daafd349a9f9f7b4aa8680f/t/5df3f83d91da223324d2f090/1587518087705/Sonde_Logo+horizontal+PMS3025.png?format=1500w
x-type: company
x-source: harvest:secondary-market
specificationVersion: '0.20'
created: '2026-08-28'
modified: '2026-09-16'
tags:
- Company
- Health
- Healthcare
- Digital Health
- Vocal Biomarkers
- Voice
- Audio
- Machine Learning
- Artificial Intelligence
- Mental Health
- Respiratory
- Remote Patient Monitoring
- Wellness
- HIPAA
tags_raw:
- Company
- Health
- Healthcare
- Digital Health
- Vocal Biomarkers
- Voice
- Audio
- Machine Learning
- Artificial Intelligence
- Mental Health
- Respiratory
- Remote Patient Monitoring
- Wellness
- HIPAA
- Machine-Learning
apis:
- name: Sonde Platform Service API
  description: The Sonde Platform Service API lets partners run Sonde Vocal Biomarker Health Checks from their own mobile,
    web and embedded applications. Services cover user registration (UserService), signed-URL audio upload (StorageService),
    measure lookup (MeasureService), synchronous and asynchronous inference (InferenceService), speech-to-text (TranscriptionService)
    and questionnaire delivery/scoring (QuestionnaireManager). Authentication is OAuth 2.0 client-credentials against an Amazon
    Cognito user pool.
  humanURL: https://sondehealth.atlassian.net/wiki/spaces/SA/pages/2707062806/Sonde+API+Platform+Introduction
  baseURL: https://api.sondeservices.com
  tags:
  - Vocal Biomarkers
  - Health Check
  - Inference
  - Transcription
  - Questionnaire
  properties:
  - type: Documentation
    url: https://sondehealth.atlassian.net/wiki/spaces/SA/overview
  - type: APIReference
    url: https://sondehealth.atlassian.net/wiki/spaces/SA/pages/2689105939/REST+API+Reference
  - type: GettingStarted
    url: https://sondehealth.atlassian.net/wiki/spaces/SA/pages/2800156688/Getting+Started%3A+Sonde+Cloud+API
  - type: Authentication
    url: authentication/sonde-health-authentication.yml
  - type: OAuthScopes
    url: scopes/sonde-health-scopes.yml
  - type: ChangeLog
    url: changelog/sonde-health-changelog.yml
- aid: sonde-health:sonde-health-authentication-api
  name: Sonde Health Authentication API
  description: The Authentication API from Sonde Health — 1 operation(s) for authentication.
  humanURL: https://sondehealth.atlassian.net/wiki/spaces/SA/pages/2707062806/Sonde+API+Platform+Introduction
  baseURL: https://api.sondeservices.com
  tags:
  - Authentication
  properties:
  - type: OpenAPI
    url: openapi/sonde-health-authentication-api-openapi.yml
  - type: APIReference
    url: https://sondehealth.atlassian.net/wiki/spaces/SPPA/pages/1614250108/REST+API+Reference
- aid: sonde-health:sonde-health-platform-api
  name: Sonde Health Platform API
  description: The Platform API from Sonde Health — 1 operation(s) for platform.
  humanURL: https://sondehealth.atlassian.net/wiki/spaces/SA/pages/2707062806/Sonde+API+Platform+Introduction
  baseURL: https://api.sondeservices.com
  tags:
  - Platform
  properties:
  - type: OpenAPI
    url: openapi/sonde-health-platform-api-openapi.yml
  - type: APIReference
    url: https://sondehealth.atlassian.net/wiki/spaces/SPPA/pages/1614250108/REST+API+Reference
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://www.sondehealth.com/
- type: DeveloperPortal
  url: https://www.sondehealth.com/dev-documentation
- type: Documentation
  url: https://sondehealth.atlassian.net/wiki/spaces/SA/overview
- type: APIReference
  url: https://sondehealth.atlassian.net/wiki/spaces/SA/pages/2689105939/REST+API+Reference
- type: GettingStarted
  url: https://sondehealth.atlassian.net/wiki/spaces/SA/pages/2800156688/Getting+Started%3A+Sonde+Cloud+API
- type: Support
  url: https://www.sondehealth.com/support
- type: Blog
  url: https://www.sondehealth.com/news-blog
- type: GitHubOrganization
  url: https://github.com/sondehealth-samples
- type: Login
  url: https://us.sondeservices.com/
- type: Portal
  url: https://us.sondeservices.com/
- type: TermsOfService
  url: https://www.sondehealth.com/terms-of-service
- type: PrivacyPolicy
  url: https://www.sondehealth.com/privacy
- type: OpenAPI
  url: openapi/_original/sonde-health-screening-api-openapi.yaml
- type: Overlay
  url: overlays/sonde-health-screening-api-overlay.yaml
- type: Authentication
  url: authentication/sonde-health-authentication.yml
- type: OAuthScopes
  url: scopes/sonde-health-scopes.yml
- type: ErrorCatalog
  url: errors/sonde-health-problem-types.yml
- type: Conventions
  url: conventions/sonde-health-conventions.yml
- type: Lifecycle
  url: lifecycle/sonde-health-lifecycle.yml
- type: Deprecation
  url: lifecycle/sonde-health-lifecycle.yml
- type: ChangeLog
  url: changelog/sonde-health-changelog.yml
- type: Packages
  url: packages/sonde-health-packages.yml
- type: SDKs
  url: packages/sonde-health-packages.yml
- type: Sandbox
  url: sandbox/sonde-health-sandbox.yml
- type: Conformance
  url: conformance/sonde-health-conformance.yml
- type: Compliance
  url: conformance/sonde-health-conformance.yml
- type: DataModel
  url: data-model/sonde-health-data-model.yml
- type: DomainSecurity
  url: security/sonde-health-domain-security.yml
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/sonde-health-llms.txt
- type: Plans
  url: plans/sonde-health-plans-pricing.yml
- type: RateLimits
  url: rate-limits/sonde-health-rate-limits.yml
x-enrichment:
  date: '2026-08-28'
  status: enriched
  artifacts_added: 23
  pass: local-v1

Sonde Health API — frequently asked questions

Does Sonde Health have an API?

Yes. APIs.io lists 3 APIs from Sonde Health, including Sonde Platform Service API, Sonde Health Authentication API and Sonde Health Platform API.

Is there an OpenAPI specification for the Sonde Health API?

Yes. APIs.io indexes 2 OpenAPI specifications for Sonde Health, each linked for download from this page.

How do I authenticate with the Sonde Health API?

Sonde Health uses bearer-token authentication (oauth2/apiKey · 1 scheme). The details are profiled on APIs.io as Sonde Health Authentication.

Is the Sonde Health API ready for AI agents?

Sonde Health has a Kin Score of 48.5 out of 100 (developing) and an Agent Readiness score of 24.6 (agent-aware), scored by API Evangelist on 2026-11-06.

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