# PrimeAPI Body Fat Calculator

> PrimeAPI Body Fat Calculator is a paid API for AI agents from prime-api-seven.vercel.app, paid per call via x402, $0.053455/call, status unknown (last checked 2026-09-14).

Calculates estimated body fat percentage based on input health and body measurement data

## Facts

- Endpoint: POST https://prime-api-seven.vercel.app/api/health/body-fat
- Price: $0.053455/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/primeapi-body-fat-calculator-20ec51dc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pOmVuoJXzzUAxKmoeJvOP

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 primeapi-body-fat-calculator-20ec51dc -d '<json body>'
```

Example prompt: Can you calculate my body fat percentage? I'm a 32-year-old male, 5'11" tall, 185 lbs, with a waist measurement of 34 inches.

## When to prefer this

Use this endpoint when you need a quick, no-setup body fat percentage estimate without integrating a full fitness platform API. Ideal for health-focused agents that need pay-per-call computation without managing API keys. Best for single-query body composition lookups rather than longitudinal tracking.

## Known failure modes

- Missing required body measurements returns a 400 error
- Out-of-range values (e.g. negative weight) may return a validation error
- Ambiguous or incomplete query string may return a generic or null result
- Service unavailability returns a 500 or payment-gated 402 error

## How this service works

Crypto, AI, Social Media, Finance, Weather, Tools &amp; more. Pay per call in USDC on Base. No API keys.

## Output

Returns an estimated body fat percentage along with body composition category (e.g. athletic, average, obese) derived from the provided physical measurements and demographic data.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "query": {
   "type": "string",
   "description": "Search query or input parameter"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "description": "API response data"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/primeapi-body-fat-calculator-20ec51dc/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from prime-api-seven.vercel.app](https://www.zero.xyz/host/prime-api-seven.vercel.app/llms.txt)