# Big Sky Health

**Canonical:** https://apis.io/providers/big-sky-health/  
**Website:** https://zerolongevity.com  
**APIs profiled:** 0

Big Sky Health (now operating as Zero Longevity Science, Inc.) is a Bozeman, Montana consumer digital-health company best known for Zero, one of the most popular intermittent-fasting and nutrition-tracking mobile apps. Zero combines a fasting timer, photo-based meal and protein logging, a personalized Protein Score, and water-intake tracking to help users manage body composition and adopt science-backed longevity practices. The company runs as a direct-to-consumer mobile subscription business (Zero Plus) on iOS and Android. As of this profile it publishes no public developer API, SDK, MCP server, or developer program. It was added to the API Evangelist network as a Trinity Ventures portfolio company awaiting enrichment.

## Kin Score — 15.2 / 100 (emerging)

Scored 2026-08-19 under rubric 0.12.0. Trend: flat (-0.4 from 15.6).

| Facet | Score |
|---|---|
| Discoverability | 50.0 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 7.1 |
| Commercial Clarity | 44.7 |
| Access Clarity | 44.7 |

Regulatory layer — **Health**: 17.5 (matched via tags).

## Agent readiness — 0.0 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## Security (1)

- **Big Sky Health Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC

## Tags

Company, Healthcare, Digital Health, Fasting, Nutrition, Longevity, Consumer App, Mobile

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/big-sky-health/). Scores are computed from the provider's own public artifacts under a published rubric.