---
title: "Biorhythm (JSON)"
method: POST
path: "/wellness/biorhythm"
tags: ["Wellness"]
---

# Biorhythm (JSON)

`POST /wellness/biorhythm`

Physical (23d), emotional (28d) and intellectual (33d) cycle values per day, plus the critical days where a cycle crosses zero. Data twin of POST /render/biorhythm.

## Request body

- Biorhythm
  - `birthDate` string, required
  - `rangeStart` string
  - `rangeEnd` string

## Response `200`

Successful calculation

- object
  - `ok` boolean
  - `data` object
    - `range` object, nullable
      - `start` string, nullable
      - `end` string, nullable
      - `days` number, nullable
    - `days` object[], nullable
      - `date` string, nullable
      - `dayOfLife` number, nullable
      - `physical` number, nullable
      - `emotional` number, nullable
      - `intellectual` number, nullable
      - `critical` unknown[], nullable
        - unknown
    - `criticalDays` object[], nullable
      - `date` string, nullable
      - `cycles` string[], nullable

## Other responses

- `400` — Validation error
- `401` — Missing or invalid API key

---

[API](https://skmtc.net/astroway/apis/astroway-calculation-api.md) · [All operations](https://skmtc.net/astroway/apis/astroway-calculation-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/astroway/astroway-calculation-api/revisions/529d7d36d7d6/schema)