Ultrahuman

Ultrahuman makes the Ring AIR and Ring Pro smart rings and the M1 continuous glucose monitor (CGM), a subscription-free metabolic-health wearable ecosystem. Its Partner (UltraSignal) API lets approved partners read user-consented health metrics - sleep, HRV, resting heart rate, skin temperature, SpO2, movement/recovery indexes, VO2 max, and (with the M1 patch) continuous glucose - over an OAuth 2.0-secured REST API. A separate UltraSignal developer program offers raw sensor streams (PPG, temperature, accelerometer) from the Ring AIR via a loaned developer kit. API access is not self-serve - partners apply and are onboarded with client credentials; end users authorize data sharing from the Ultrahuman app.

Ultrahuman publishes 4 APIs on the APIs.io network, including Metrics API, User API, O Auth API, and 1 more. Tagged areas include Wearables, Smart Ring, Health, Metabolic Health, and Sleep.

Ultrahuman’s developer surface includes authentication, documentation, signup flow, and 9 more developer resources.

🌐 Visit website 📡 Source on GitHub

38.9/100 thin ▬ flat Agent 45/100 agent ready Front door AI 1/6 silent saas Full breakdown ↓
scored 2026-10-04 · rubric v0.23.0

AccessFreemiumSelf serve⚡ Free to try

1 published contract 1 MCP Servers

Wearables Smart Ring Health Metabolic Health SleepHRVRecovery CGMGlucoseDigital Health

Kin Score

Kin Score How this is scored →
scored 2026-10-04 · rubric v0.23.0

Composite quality — 38.9/100 · thin

Contract Quality 9.1 / 19

Developer Ergonomics 4.5 / 15

Access Clarity 7.6 / 15

Operational Transparency 2.8 / 10

Contract Governance 0.0 / 9

Discoverability 5.1 / 8

Regulatory Posture 2.7 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 45/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 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 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 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

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/.

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/ultrahuman: 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 4

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

UltraSignal Sensor Platform API

UltraSignal is Ultrahuman's wearable developer platform for building custom algorithms on raw Ring AIR sensor streams - photoplethysmography (PPG), temperature, and acceleromete...

Ultrahuman Metrics API

Ring and CGM daily metrics for consented users.

Ultrahuman User API

Basic authorized-user profile information.

Ultrahuman O Auth API

OAuth 2.0 authorization, token exchange, and revocation.

Open Collections 4

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

API Collection

OPEN COLLECTION

Ultrahuman Partner (UltraSignal) Metrics API

OPEN COLLECTION

Ultrahuman Partner (UltraSignal) Metrics OAuth API

OPEN COLLECTION

Ultrahuman Partner (UltraSignal) Metrics User API

OPEN COLLECTION

MCP Servers 1

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

Ultrahuman MCP Server

Remote MCP server at api.ultrahuman.com over HTTP.

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Ultrahuman Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Ultrahuman Rate Limits

4 limits

RATE LIMITS

FinOps 1

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

Ultrahuman Finops

FINOPS

Security Posture 4

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

Ultrahuman Authentication

http · 1 scheme

SECURITY

Ultrahuman Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Ultrahuman Vulnerability Disclosure

security.txt · contact published

SECURITY

Ultrahuman Trust Center

ISO 27001, HIPAA, GDPR

SECURITY

Agentic Access 1

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

Ultrahuman Agentic Access

5 operations · 2 acting · 1 human-in-the-loop

5 operations · 2 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

SignUp

SignUp

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Access & Security 4

Authentication, authorization, and security posture

TrustCenter

TrustCenter

VulnerabilityDisclosure

VulnerabilityDisclosure

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 2

The organization behind the API

Website

Website

LinkedIn

Source (apis.yml)

aid: ultrahuman
url: https://raw.githubusercontent.com/api-evangelist/ultrahuman/refs/heads/main/apis.yml
name: Ultrahuman
kind: company
description: Ultrahuman makes the Ring AIR and Ring Pro smart rings and the M1 continuous glucose monitor (CGM), a subscription-free
  metabolic-health wearable ecosystem. Its Partner (UltraSignal) API lets approved partners read user-consented health metrics
  - sleep, HRV, resting heart rate, skin temperature, SpO2, movement/recovery indexes, VO2 max, and (with the M1 patch) continuous
  glucose - over an OAuth 2.0-secured REST API. A separate UltraSignal developer program offers raw sensor streams (PPG, temperature,
  accelerometer) from the Ring AIR via a loaned developer kit. API access is not self-serve - partners apply and are onboarded
  with client credentials; end users authorize data sharing from the Ultrahuman app.
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/ultrahuman.png
tags:
- Wearables
- Smart Ring
- Health
- Metabolic Health
- Sleep
- HRV
- Recovery
- CGM
- Glucose
- Digital Health
created: '2026-07-03'
modified: '2026-07-03'
specificationVersion: '0.23'
apis:
- aid: ultrahuman:ultrahuman-ultrasignal-api
  name: UltraSignal Sensor Platform API
  tags:
  - UltraSignal
  - Sensors
  - PPG
  - Accelerometer
  - Developer Platform
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.ultrahuman.com/ultrasignal/
  baseURL: https://partner.ultrahuman.com
  properties:
  - url: https://www.ultrahuman.com/ultrasignal/
    type: Documentation
  description: UltraSignal is Ultrahuman's wearable developer platform for building custom algorithms on raw Ring AIR sensor
    streams - photoplethysmography (PPG), temperature, and accelerometer data. Access is application-gated with a loaned developer
    kit; priority goes to apps that leverage the ring's sensors. No public endpoint contract is documented, so this API is
    listed for discovery without modeled endpoints.
- aid: ultrahuman:ultrahuman-metrics-api
  name: Ultrahuman Metrics API
  description: Ring and CGM daily metrics for consented users.
  humanURL: https://vision.ultrahuman.com/developer-docs
  baseURL: https://partner.ultrahuman.com
  tags:
  - Metrics
  properties:
  - type: OpenAPI
    url: openapi/ultrahuman-metrics-api-openapi.yml
  - type: Documentation
    url: https://vision.ultrahuman.com/developer-docs
  - type: APIReference
    url: https://www.ultrahuman.com/blog/accessing-the-ultrahuman-partnership-api/
  - type: PostmanCollection
    url: collections/ultrahuman.postman_collection.json
  - type: Documentation
    url: https://vision.ultrahuman.com/developer-docs?type=oauth
- aid: ultrahuman:ultrahuman-user-api
  name: Ultrahuman User API
  description: Basic authorized-user profile information.
  humanURL: https://vision.ultrahuman.com/developer-docs
  baseURL: https://partner.ultrahuman.com
  tags:
  - User
  properties:
  - type: OpenAPI
    url: openapi/ultrahuman-user-api-openapi.yml
  - type: Documentation
    url: https://vision.ultrahuman.com/developer-docs
  - type: APIReference
    url: https://www.ultrahuman.com/blog/accessing-the-ultrahuman-partnership-api/
  - type: PostmanCollection
    url: collections/ultrahuman.postman_collection.json
  - type: Documentation
    url: https://vision.ultrahuman.com/developer-docs?type=oauth
- aid: ultrahuman:ultrahuman-oauth-api
  name: Ultrahuman O Auth API
  description: OAuth 2.0 authorization, token exchange, and revocation.
  humanURL: https://www.ultrahuman.com/ultrasignal/
  baseURL: https://partner.ultrahuman.com
  tags:
  - Authentication
  tags_raw:
  - OAuth
  properties:
  - type: OpenAPI
    url: openapi/ultrahuman-oauth-api-openapi.yml
  - type: Documentation
    url: https://vision.ultrahuman.com/developer-docs
  - type: APIReference
    url: https://www.ultrahuman.com/blog/accessing-the-ultrahuman-partnership-api/
  - type: PostmanCollection
    url: collections/ultrahuman.postman_collection.json
  - type: Documentation
    url: https://vision.ultrahuman.com/developer-docs?type=oauth
common:
- type: AgenticAccess
  url: agentic-access/ultrahuman-agentic-access.yml
- type: TrustCenter
  url: security/ultrahuman-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/ultrahuman-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/ultrahuman-domain-security.yml
- type: Authentication
  url: authentication/ultrahuman-authentication.yml
- type: Website
  url: https://www.ultrahuman.com
- type: LinkedIn
  url: https://www.linkedin.com/company/ultrahuman
- type: Documentation
  url: https://vision.ultrahuman.com/developer-docs
- type: SignUp
  url: https://partnerships.ultrahuman.com/
- type: Plans
  url: plans/ultrahuman-plans-pricing.yml
- type: RateLimits
  url: rate-limits/ultrahuman-rate-limits.yml
- type: FinOps
  url: finops/ultrahuman-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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