niche · 1.2 market industry

Sleep

Score 18.4 / 100 30 providers 7 APIs Search apis.io →
Variants seen in the corpus: Sleepsleep

Providers using this tag (30)

Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.

Exemplar 2 Complete, well-documented, and agent-ready
VitalHealth DataWearablesLab TestingDigital Health18 APIs74.7FitbitWearableHealthFitnessActivity Tracking3 APIs67.6
Strong 4 Solid coverage with minor gaps
SeekrArtificial IntelligenceGenerative AIAgentsLLM35 APIs61.3WHOOPFitnessWearablesHealthRecovery7 APIs60.4OuraActivityBiometricsCardiovascularFitness22 APIs59.1CalmCompanyMental HealthWellnessMeditation2 APIs55.8
Developing 3 Usable, with meaningful gaps to close
Oura RingHealthWearablesFitness21 APIs51.1PolarFitnessHealthWearablesHeart Rate19 APIs43.3UltrahumanWearablesSmart RingHealthMetabolic Health4 APIs41.6
Thin 4 Limited public surface area
SpikeHealth DataWearablesFitnessDigital Health12 APIs38.2TerraWearablesHealth DataFitnessAggregator11 APIs37.9Eight SleepIoTSmart HomeWearables7 APIs37.5WithingsHealthWearablesConnected DevicesBody Composition18 APIs37.3
Emerging 8 Early or largely undocumented
OwletcareCompanyBaby CareHealth MonitoringConsumer Electronics20.9HeadspaceMental HealthMeditationMindfulness15.5DuroflexworldCompanyE-CommerceRetail14.1CasperCompanyE-CommerceRetail13.5DawnCompanyDigital HealthHealthcare12.6SomneeCompanySleep TechnologyNeurotechnology12.6Mind Candy, MoshiCompanyConsumerChildrenEducation11.7EndelCompanyWellnessAudioSoundscapes11.2
Minimal 9 Almost no public developer surface
Stellar SleepCompanyConsumerHealth10.8Pluto BrandCompanyWellnessE-Commerce10.6AumioCompanyHealthcareDigital HealthMental Health10.5Sleep NumberCompanyHealthWellness10.0Vongi Health (芝兰健康)CompanyHealthcareDigital TherapeuticsDigital Health9.9Equinox HoldingsFitnessLuxuryHealthWellness8 APIs8.6Pura MenteCompanyMeditationMindfulness8.4GabitCompanyHealthWellnessWearables7.9Beacon BiosignalsCompanyLife SciencesNeurotechnologyEEG7.7

APIs with this tag (7)

Ranked by the provider's API Evangelist rating — the Kin Score is scored per provider, not per API, so every API of a provider shares its band. How the rating works →

Strong 2 Solid coverage with minor gaps
Seekr Sleep APIThe Sleep API from Seekr — 1 operation(s) for sleep.61.3WHOOP Sleep APIThe Sleep API from WHOOP — 3 operation(s) for sleep.60.4
Developing 1 Usable, with meaningful gaps to close
Polar Sleep APISleep endpoints support [Polar Sleep Plus™](https://www.polar.com/en/smart-coaching/polar-sleep-plus)...43.3
Thin 3 Limited public surface area
Spike Sleep APIQuery normalized sleep sessions and stages.38.2Terra Sleep APISleep sessions and stages.37.9Withings sleep APIReturns data related to user sleep activities, wether they are captured by an Activity Tracker or a Sleep M...37.3
Minimal 1 Almost no public developer surface
Equinox HotelsLuxury hospitality brand positioned as "The Pioneer of Performance Luxury." Operates properties in New York...8.6

Score breakdown

Frequency
43.9
log-scaled weighted occurrences
Breadth
0.8
spread across providers
Quality lift
34.5
mean composite of providers using it
Cohesion
2.0
strength of nearest seed neighbor

Related tags

Heart Rate 5 co-occurrences Wearables 13 co-occurrences Fitness 9 co-occurrences Wellness 9 co-occurrences Mental Health 6 co-occurrences Digital Health 9 co-occurrences Health 14 co-occurrences User 9 co-occurrences

Where this tag comes from

Provider tag25
Api tag7
Openapi tag6
Openapi op tag12

Cohort brief

Auto-generated

The 30 providers in the APIs.io catalog tagged Sleep, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers
30
all scored
Mean Kin Score
28.7
+8.0 vs catalog 20.7
Mean Agent Readiness
13.7
+4.0 vs catalog 9.7
Spread
7.7–74.7
median 14.8 · σ 21.4
How the 30 split by band
Exemplar 2Strong 4Developing 3Thin 4Emerging 8Minimal 9
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Access Clarity 36.3 22.3 +14 30
Contract Quality 26.4 17.5 +8.9 30
Developer Ergonomics 23.3 17.9 +5.4 30
Operational Transparency 15.3 11.3 +4 30
Discoverability 61.3 60.4 +0.9 30
Contract Governance 7.1 6.4 +0.7 30

A facet is averaged over the members that carry it, not over the whole cohort — the “Scored” column is that count. Averaging an absent facet as zero would score our own coverage gaps as the providers’ posture.

What this cohort publishes
ArtifactThis cohortCatalogDifference
MCP server (any) 13% 16% -3
MCP server (first-party) 10% 7% +3
Agent Skills 0% 0% 0
OAuth scopes 27% 9% +18
Security 93% 88% +5
Arazzo workflows 3% 2% +1
Governance rules 23% 13% +10

mcp_pct counts any mcp/ artifact including ones API Evangelist derived from the provider OpenAPI; mcp_first_party_pct counts only servers the provider publishes. Prefer the latter.

Top by Kin Score
  1. 1 Vital 74.7
  2. 2 Fitbit 67.6
  3. 3 Seekr 61.3
  4. 4 WHOOP 60.4
  5. 5 Oura 59.1
  6. 6 Calm 55.8
  7. 7 Oura Ring 51.1
  8. 8 Polar 43.3
  9. 9 Ultrahuman 41.6
  10. 10 Spike 38.2
Top by Agent Readiness
  1. 1 Vital 40.6
  2. 2 Seekr 35.8
  3. 3 WHOOP 31.7
  4. 4 Polar 30.6
  5. 5 Fitbit 30
  6. 6 Oura 29.9
  7. 7 Oura Ring 27.7
  8. 8 Withings 26.6
  9. 9 Calm 24.8
  10. 10 Terra 22.3
All 30 members of this roster resolve to a scored provider in the catalog.Generated from the catalog build of 25 August 2026, across 26891 providers, using the same computation served by the APIs.io cohort API. Briefs are published for rosters of 5 or more scored providers; below that a distribution is not meaningful.

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Tools for tags

7 MCP tools reach this
  • find_tagsBrowse and filter every tag in the catalog.
  • get_cohortThis tag as a scored cohort — every provider carrying it, with scores.
  • cohort_statsPRO — the distribution across this tag: mean, median, band split, adoption rates.
  • cohort_rankingsPRO — the leaderboard, on composite AND agent-readiness axes.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools

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All tags 
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As a scored cohort 
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The distribution (Pro) 
curl "https://apis.io/api/v1/cohorts/tag/sleep/stats" \
  -H "X-API-Key: $APIS_IO_KEY"

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