# BMI Calculator with WHO Category

> BMI Calculator with WHO Category is a paid API for AI agents from minty-sprout.onrender.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-11-01).

Calculates body mass index (BMI) and returns the corresponding WHO adult weight category from weight (kg) and height (cm).

## Facts

- Endpoint: POST https://minty-sprout.onrender.com/v1/bmi?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/bmi-calculator-with-who-category-fabef1fb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7ZVRousSVB-k9XWgOXHOr

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 bmi-calculator-with-who-category-fabef1fb -d '<json body>'
```

Example prompt: Can you calculate the BMI for someone who weighs 82 kg and is 178 cm tall, and tell me which WHO category they fall into?

## When to prefer this

Choose this endpoint when you need a quick, serverless BMI computation with WHO category labeling and no setup required. Ideal for health dashboards, fitness apps, or conversational agents that need an instant body-weight classification. It is simpler and cheaper than building custom health-metric logic, and returns the standard WHO adult categories directly.

## Known failure modes

- Missing or malformed input string (no weight or height values) — may return an error or unexpected output
- Height of zero or negative value causing division-by-zero in BMI formula
- Non-numeric characters in the input string — parser may fail to extract values
- Extreme or physiologically implausible values (e.g. 0 kg, 500 cm) may produce unusual category results

## How this service works

BMI calculator: body mass index and WHO category from weight and height. Input: 'weight kg, height cm'.

## Output

Returns a JSON object with the computed BMI value (float), the WHO adult weight category (e.g. 'normal', 'overweight', 'obese', 'underweight'), the input weight in kg, the input height in cm, and a brief note that results are not medical advice.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "input": {
   "type": "string",
   "maxLength": 8000,
   "description": "'weight kg, height cm'"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "bmi": 22.9,
  "note": "WHO adult categories; not medical advice.",
  "category": "normal",
  "height_cm": 175,
  "weight_kg": 70
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/bmi-calculator-with-who-category-fabef1fb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from minty-sprout.onrender.com](https://www.zero.xyz/host/minty-sprout.onrender.com/llms.txt)