Caremessage

CareMessage is a healthcare technology non-profit that operates one of the largest patient engagement platforms serving low-income and underserved populations across the United States. Since 2013 the platform has reached more than 20 million patients and is used by roughly 1 in 7 federally qualified health centers plus 200+ free clinics. Its products include 1:1 direct messaging, appointment lifecycle messaging, population outreach, health coaching, closed-loop referrals, Social Determinants of Health (SDOH) workflows, and Wellness Copilot, an AI-backed diabetes-management automation. CareMessage does not currently publish a public developer API, SDK, or API reference; access to the platform is through its web application and a login-gated help center. This profile was surfaced as a Y Combinator portfolio company and enriched from CareMessage's public web surface.

Caremessage is profiled on the APIs.io network. Tagged areas include Company, Healthcare, Patient Engagement, Messaging, and Communications.

Caremessage’s developer surface includes support, engineering blog, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub

12.5/100 emerging ▬ flat Agent 0/100 human only saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

0 APIs

Company Healthcare Patient Engagement Messaging Communications Health Equity SMS Non-Profit Digital Health

Kin Score

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

Composite quality — 12.5/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 1.2 / 17

Access Clarity 4.7 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 4.9 / 9

Regulatory Posture 2.6 / 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

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 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 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.

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/. 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/caremessage: 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 →

Security Posture 1

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

Caremessage Domain Security

TLSv1.3 · DNSSEC · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

Login

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

WellKnown

WellKnown

LLMsTxt

LLMsTxt

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

HelpCenter

HelpCenter

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

TermsOfService

TermsOfService

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: caremessage
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: 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/caremessage.png
name: Caremessage
description: CareMessage is a healthcare technology non-profit that operates one of the largest patient engagement platforms
  serving low-income and underserved populations across the United States. Since 2013 the platform has reached more than 20
  million patients and is used by roughly 1 in 7 federally qualified health centers plus 200+ free clinics. Its products include
  1:1 direct messaging, appointment lifecycle messaging, population outreach, health coaching, closed-loop referrals, Social
  Determinants of Health (SDOH) workflows, and Wellness Copilot, an AI-backed diabetes-management automation. CareMessage
  does not currently publish a public developer API, SDK, or API reference; access to the platform is through its web application
  and a login-gated help center. This profile was surfaced as a Y Combinator portfolio company and enriched from CareMessage's
  public web surface.
url: https://raw.githubusercontent.com/api-evangelist/caremessage/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Healthcare
- Patient Engagement
- Messaging
- Communications
- Health Equity
- SMS
- Non-Profit
- Digital Health
apis: []
common:
- type: Website
  url: https://www.caremessage.org/
  name: CareMessage Website
- type: HelpCenter
  url: https://help.caremessage.org/en/
  name: CareMessage Help Center
- type: Support
  url: https://www.caremessage.org/contact-us/
  name: Contact / Request a Demo
- type: Blog
  url: https://www.caremessage.org/blog/
  name: CareMessage Blog
- type: Login
  url: https://app.caremessage.org/
  name: Platform Login
- type: PrivacyPolicy
  url: https://www.caremessage.org/privacy-policy/
  name: Privacy Policy
- type: TermsOfService
  url: https://www.caremessage.org/terms-of-use/
  name: Terms of Use
- type: WellKnown
  url: well-known/caremessage-well-known.yml
  name: Well-Known Discovery Index
- type: DomainSecurity
  url: security/caremessage-domain-security.yml
  name: Domain Security Posture
- type: LLMsTxt
  url: llms/caremessage-llms.txt
  name: llms.txt
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

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