# Child Height Predictor API

> For the complete documentation index, see [llms.txt](/llms.txt).

Predicted adult height from parents' heights via the mid-parental (Tanner) method with range and adult percentile.

Use this endpoint to add the tool to your app, site, workflow, or agent without rebuilding formulas, validation, examples, and docs.

- Slug: `child-height-predictor`
- Category: `health`
- Version: `2026-04-22`
- Credits per successful call: 1
- Starts on: free
- Max payload: 65536 bytes
- Privacy mode: `hash_only`
- Available on: free, starter, pro, business, scale
- Browser tool: https://miniwebtool.com/child-height-predictor/

## Endpoint

`POST https://api.miniwebtool.com/v1/tools/child-height-predictor/run`

## Request body

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `gender` | `str` | no | boy | girl Choices: boy, girl |
| `father_height` | `float` | no | Father's height in height_unit |
| `mother_height` | `float` | no | Mother's height in height_unit |
| `height_unit` | `str` | no | cm | in Choices: cm, in |

## Example request

```json
{
  "gender": "boy",
  "father_height": 178,
  "mother_height": 165,
  "height_unit": "cm"
}
```

## cURL

```bash
curl -X POST https://api.miniwebtool.com/v1/tools/child-height-predictor/run \
  -H 'Authorization: Bearer mwt_live_YOUR_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"gender":"boy","father_height":178,"mother_height":165,"height_unit":"cm"}'
```

## Response envelope

```json
{
  "request_id": "01K...",
  "tool": "child-height-predictor",
  "tool_version": "2026-04-22",
  "credits_used": 1,
  "result": {}
}
```

## Errors

Errors are RFC 7807 `application/problem+json`. Branch on `code`, not `title`.

## MCP

Agents can discover and call this tool through `https://api.miniwebtool.com/mcp` or `https://api.miniwebtool.com/v1/mcp` using MCP `tools/list` and `tools/call`.

## Frequently asked

### What does the Child Height Predictor API do?

Predicted adult height from parents' heights via the mid-parental (Tanner) method with range and adult percentile. Use it to add this utility without rebuilding formulas, validation, examples, and documentation.

### How much does one call cost?

1 credit per successful call. Failed calls do not bill.

### What parameters are required?

Required fields: (none). Full schema at `https://api.miniwebtool.com/v1/openapi.json`.

### Is this deterministic?

Yes. Same input, same output. Tool version: 2026-04-22.