# Rex Inc

**Canonical:** https://apis.io/providers/rex-inc/  
**Website:** https://www.rex.fit  
**APIs profiled:** 0

Rex Inc, operating as Rex.fit (BabylonAI Inc.), is a Y Combinator (W23) health and fitness company building AI-powered, fully automated nutrition tracking. Its consumer products include Rex Nutribot, a WhatsApp AI nutrition coach; the Drop, a wearable AI camera pendant that detects meals and automatically logs calories, protein, carbs, and fats via computer vision; an AI body scanner; and personalized coaching with daily health reports. Rex also offers a white-label B2B nutrition-and-fitness AI that fitness chains and app builders integrate to add meal logging (photo, barcode, or text), recipe and meal-plan generation, workout logging, 3D body scans, and nutrition analytics under their own brand.

## Kin Score — 12.4 / 100 (emerging)

Scored 2026-08-19 under rubric 0.12.0. Trend: flat (-0.6 from 13.0).

| Facet | Score |
|---|---|
| Discoverability | 50.0 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 16.7 |
| Commercial Clarity | 21.1 |
| Access Clarity | 21.1 |

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)

- **Rex Inc Domain Security** — TLSv1.3 · HSTS · DMARC

## Tags

Company, Health, Fitness, Nutrition, Artificial Intelligence, Computer Vision, Wearables, Y Combinator

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