# RoxyAPI Biorhythm API

**Canonical:** https://apis.io/apis/roxyapi/roxyapi-biorhythm-api/  
**Provider:** RoxyAPI — https://apis.io/providers/roxyapi/  
**Base URL:** https://roxyapi.com/api/v2  
**Documentation:** https://roxyapi.com/api-reference

RoxyAPI Biorhythm API is one of 16 APIs that [RoxyAPI](https://apis.io/providers/roxyapi/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Biorhythm. The published artifact set on APIs.io includes an OpenAPI specification and API documentation.

The most complete biorhythm API: 10 cycle types across 3 primary (physical, emotional, intellectual), 4 secondary (intuitive, aesthetic, awareness, spiritual), and 3 composite (passion, mastery, wisdom). Critical-day detection with severity classification, 90-day forecasts with best and worst days, two-person compatibility scoring, phase tracking for dashboards, and seeded daily readings for push notifications. 8 languages, deterministic results, and editorial-grade interpretations. One key covers every RoxyAPI domain, with Remote MCP and typed SDKs. Ship a biorhythm feature in hours, not weeks.

## Operations (6)

| Method | Path | Summary |
|---|---|---|
| POST | `/biorhythm/reading` | Get biorhythm reading - Complete cycle analysis for any date |
| POST | `/biorhythm/forecast` | Get biorhythm forecast - Multi-day cycle predictions with best and worst days |
| POST | `/biorhythm/critical-days` | Find critical days - Zero crossing detection for any date range |
| POST | `/biorhythm/compatibility` | Calculate compatibility - Biorhythm alignment between two people |
| POST | `/biorhythm/phases` | Get phase info - Lightweight cycle status for dashboards and widgets |
| POST | `/biorhythm/daily` | Get daily biorhythm - Seeded reading for daily check-in features |

## Machine-readable artifacts (7)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/roxyapi/refs/heads/main/openapi/roxyapi-biorhythm-api-openapi.yml
- **Documentation** — https://roxyapi.com/docs/introduction
- **PostmanCollection** — https://www.postman.com/roxylabs-7113570/roxyapi
- **LLMsTxt** — https://roxyapi.com/llms.txt
- **AgentSkills** — https://roxyapi.com/AGENTS.md
- **Documentation** — https://roxyapi.com/mcp/docs
- **ToolCrosswalk** — https://raw.githubusercontent.com/api-evangelist/roxyapi/refs/heads/main/mcp/roxyapi-tool-crosswalk.yml

## Other RoxyAPI APIs (12)

- [RoxyAPI Angel Numbers API](https://apis.io/apis/roxyapi/roxyapi-angel-numbers-api/)
- [RoxyAPI Chinese Astrology API](https://apis.io/apis/roxyapi/roxyapi-chinese-astrology-api/)
- [RoxyAPI Crystals and Healing Stones API](https://apis.io/apis/roxyapi/roxyapi-crystals-and-healing-stones-api/)
- [RoxyAPI Dreams API](https://apis.io/apis/roxyapi/roxyapi-dreams-api/)
- [RoxyAPI Feng Shui API](https://apis.io/apis/roxyapi/roxyapi-feng-shui-api/)
- [RoxyAPI Forecast API](https://apis.io/apis/roxyapi/roxyapi-forecast-api/)
- [RoxyAPI Human Design API](https://apis.io/apis/roxyapi/roxyapi-human-design-api/)
- [RoxyAPI I Ching API](https://apis.io/apis/roxyapi/roxyapi-i-ching-api/)
- [RoxyAPI Languages API](https://apis.io/apis/roxyapi/roxyapi-languages-api/)
- [RoxyAPI Location and Timezone API](https://apis.io/apis/roxyapi/roxyapi-location-and-timezone-api/)
- [RoxyAPI Numerology API](https://apis.io/apis/roxyapi/roxyapi-numerology-api/)
- [RoxyAPI Tarot API](https://apis.io/apis/roxyapi/roxyapi-tarot-api/)

## Tags

Biorhythm

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/roxyapi/roxyapi-biorhythm-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/roxyapi/.