Stellar Sleep

Stellar Sleep (Y Combinator S23, backed by Initialized Capital) is a mobile app that helps people with chronic insomnia sleep better using psychology rather than medication. Its personalized program is based on CBT-I (Cognitive Behavioral Therapy for Insomnia), the first-line treatment recommended by sleep experts, delivered through iOS and Android apps published by Merlin Collective, LLC. Started at Harvard Innovation Labs in 2021, Stellar Sleep also offers clinician and employer programs, with clinical-system integrations arranged by its team. It is a consumer digital-health product with no public developer API, SDK, or MCP surface.

Stellar Sleep is profiled on the APIs.io network. Tagged areas include Company, Consumer, Health, Sleep, and Insomnia.

Stellar Sleep’s developer surface includes engineering blog, support, signup flow, and 6 more developer resources.

🌐 Visit website 📡 Source on GitHub

11.5/100 emerging ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-08-21 · rubric v0.12.0

0 APIs

Company Consumer Health SleepInsomniaMental Health Digital Therapeutics Mobile Apps

Kin Score

Kin Score How this is scored →
scored 2026-08-21 · rubric v0.12.0

Composite quality — 11.5/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 1.2 / 17

Access Clarity 3.6 / 17

Operational Transparency 0.3 / 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

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/stellar-sleep: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Get Started 1

Portal, sign-up, and the first successful call

SignUp

SignUp

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: stellar-sleep
name: Stellar Sleep
description: Stellar Sleep (Y Combinator S23, backed by Initialized Capital) is a mobile app that helps people with chronic
  insomnia sleep better using psychology rather than medication. Its personalized program is based on CBT-I (Cognitive Behavioral
  Therapy for Insomnia), the first-line treatment recommended by sleep experts, delivered through iOS and Android apps published
  by Merlin Collective, LLC. Started at Harvard Innovation Labs in 2021, Stellar Sleep also offers clinician and employer
  programs, with clinical-system integrations arranged by its team. It is a consumer digital-health product with no public
  developer API, SDK, or MCP surface.
url: https://raw.githubusercontent.com/api-evangelist/stellar-sleep/refs/heads/main/apis.yml
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://stellarsleep.com/images/logo_stellar_green.svg
x-type: company
x-source: vc-portfolio
x-backed-by:
- initialized-capital
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Consumer
- Health
- Sleep
- Insomnia
- Mental Health
- Digital Therapeutics
- Mobile Apps
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://stellarsleep.com/
- type: Blog
  url: https://stellarsleep.com/blog
- type: Support
  url: https://support.stellarsleep.com/portal/en/kb/stellar-sleep
- type: SignUp
  url: https://lp.stellarsleep.com/
- type: TermsOfService
  url: https://stellarsleep.com/terms
- type: PrivacyPolicy
  url: https://stellarsleep.com/privacy
- type: GitHubOrganization
  url: https://github.com/stellarsleep
- type: DomainSecurity
  url: security/stellar-sleep-domain-security.yml
- type: LLMsTxt
  url: llms/stellar-sleep-llms.txt
x-enrichment:
  date: '2026-07-21'
  status: minimal
  artifacts_added: 3
  pass: local-v1

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