Cardiogram

Cardiogram is a digital-health company whose consumer app analyzes heart-rate and activity data from wearables such as the Apple Watch, Wear OS, Garmin, and Fitbit to help people understand their cardiovascular health. Its DeepHeart deep-neural-network technology was developed to screen heart-rate patterns for signs of conditions including atrial fibrillation, sleep apnea, diabetes, and hypertension, work studied in collaboration with academic health researchers. The company is backed by Andreessen Horowitz (a16z). This profile was added to the API Evangelist network as a venture-portfolio lead; as of this pass Cardiogram exposes no public developer or API surface and its primary website (cardiogram.com) does not complete an HTTPS/TLS handshake.

Cardiogram is profiled on the APIs.io network. Tagged areas include Company, Health, Healthcare, Digital Health, and Wearables.

🌐 Visit website 📡 Source on GitHub
3.3/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-08-20 · rubric v0.12.0
0 APIs
CompanyHealthHealthcareDigital HealthWearablesHeart RateCardiovascularMachine-LearningConsumer Health

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-20 · rubric v0.12.0
Composite quality — 3.3/100 · minimal
Contract Quality 0.0 / 21
Developer Ergonomics 0.0 / 17
Access Clarity 0.0 / 17
Operational Transparency 0.0 / 11
Contract Governance 0.0 / 10
Discoverability 4.3 / 9
Regulatory Posture 1.1 / 15
Agent readiness — 0/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
Documented Reversibility 0 / 6
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 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
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.
The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% 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/. This rating is computed from github.com/api-evangelist/cardiogram: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Security Posture 1

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

Cardiogram Domain Security

DMARC

SECURITY

Resources

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Company 1

The organization behind the API

Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: cardiogram
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/cardiogram.png
name: Cardiogram
description: Cardiogram is a digital-health company whose consumer app analyzes heart-rate and activity data from wearables
  such as the Apple Watch, Wear OS, Garmin, and Fitbit to help people understand their cardiovascular health. Its DeepHeart
  deep-neural-network technology was developed to screen heart-rate patterns for signs of conditions including atrial fibrillation,
  sleep apnea, diabetes, and hypertension, work studied in collaboration with academic health researchers. The company is
  backed by Andreessen Horowitz (a16z). This profile was added to the API Evangelist network as a venture-portfolio lead;
  as of this pass Cardiogram exposes no public developer or API surface and its primary website (cardiogram.com) does not
  complete an HTTPS/TLS handshake.
url: https://raw.githubusercontent.com/api-evangelist/cardiogram/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Health
- Healthcare
- Digital Health
- Wearables
- Heart Rate
- Cardiovascular
- Machine-Learning
- Consumer Health
tags_raw:
- Company
- Health
- Healthcare
- Digital Health
- Wearables
- Heart Rate
- Cardiovascular
- Machine Learning
- Consumer Health
common:
- type: DomainSecurity
  url: security/cardiogram-domain-security.yml
- type: Website
  url: https://cardiogram.com
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence