# Personal Biorhythm Calculator

> Personal Biorhythm Calculator is a paid API for AI agents from api.cn402.com, paid per call via x402, $0.016/call, status unknown (last checked 2026-09-15).

Computes the physical (23-day), emotional (28-day), and intellectual (33-day) biorhythm cycle values for a person on a given date based on their birth date.

## Facts

- Endpoint: GET https://api.cn402.com/fengshui/biorhythm
- Price: $0.016/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-cn402-com-7cd4163c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EuhfUdc0OKu8dyogGP9A3

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability api-cn402-com-7cd4163c
```

Example prompt: What are my biorhythm readings today — physical, emotional, and intellectual — if I was born on March 15, 1990? Check for today's date.

## When to prefer this

Use this endpoint when you need to compute Western-style personal biorhythm cycles (physical/emotional/intellectual) from a birth date. Prefer it over generic wellness APIs when the user specifically asks about biorhythm, personal energy cycles, or 23/28/33-day cycle calculations.

## Known failure modes

- Missing or invalid birth date returns a 400 error
- Missing or invalid target date returns a 400 error
- Date format mismatch causes parsing failure
- Birth date in the future may return an error or nonsensical result
- Payment not fulfilled returns 402 Payment Required

## How this service works

Biorhythm, personal biorhythm, 生物节律, physical emotional intellectual cycles, 23 28 33 day cycles, circadian fluctuation, personal energy chart, 西方生物钟, personal performance cycle. Compute personal biorhythm (physical 23-day, emotional 28-day, intellectual 33-day) from birth date for a target date.

## Output

Returns the current phase and numerical value for each of the three biorhythm cycles (physical 23-day, emotional 28-day, intellectual 33-day) for the given birth date and target date, indicating whether each cycle is at a peak, low, or mid-point.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "on": {
   "type": "string",
   "description": "On (optional)"
  },
  "birth": {
   "type": "string",
   "description": "Birth (optional)"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-cn402-com-7cd4163c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.cn402.com](https://www.zero.xyz/host/api.cn402.com/llms.txt)