# MiniMax H3 (Hailuo-03) API

> MiniMax H3 (Hailuo-03) — high-quality AI video generation.

- **Provider**: Hailuo
- **Model id**: `minimax-h3-text-to-video`
- **Modality**: video
- **Price**: 29.29 credits /sec

## Overview

MiniMax H3 (Hailuo-03) is called in two steps: create a generation task, then poll the task until the result is ready.

## Authentication

All requests require a Bearer Token in the request header:

```
Authorization: Bearer YOUR_API_KEY
```

## Create Task

`POST https://you.bot/api/v1/generate`

| Parameter | Type | Required | Description |
|-----------|------|----------|-------------|
| modelId | string | Yes | Model id: `minimax-h3-text-to-video` |
| input | object | Yes | Input parameters object (see below) |
| callbackUrl | string | No | https URL to receive a signed webhook on completion |

### input object parameters

| Parameter | Type | Required | Description |
|-----------|------|----------|-------------|
| prompt | string | Yes | Video description prompt. Max 7000 characters. (default: A luminous spiral conch shell rests on black volcanic sand as the tide draws back, faint bioluminescence tracing its ridges, slow forward camera move. Audio: shallow waves, wind over wet sand, one low resonant tone.) |
| duration | number | Yes | Video duration in seconds. Available values: 4-15. (range 4-15) (default: 15) |
| aspect_ratio | string | Yes | The ratio of output video. (options: 21:9 | 16:9 | 4:3 | 1:1 | 3:4 | 9:16) (default: 21:9) |

### Request example

```json
{
  "modelId": "minimax-h3-text-to-video",
  "input": {
    "prompt": "A cinematic aerial shot of a coastal town at golden hour, gentle waves rolling onto the shore, warm light, slow camera push-in.",
    "duration": "15",
    "aspect_ratio": "21:9"
  }
}
```

### Response example

```json
{
  "taskId": "281e5b0…f39b9",
  "creditsCharged": 24
}
```

## Query Task

`GET https://you.bot/api/v1/task/{taskId}?model=minimax-h3-text-to-video`

When `state` is `success`, the output is in `resultUrls`: `{ "state": "success", "resultUrls": [ ... ] }`. (Text models return inline in the create response.)

## Error Codes

| Code | Description |
|------|-------------|
| 200 | Request successful |
| 400 | Invalid request parameters |
| 401 | Authentication failed, check API Key |
| 402 | Insufficient account balance |
| 422 | Parameter validation failed |
| 429 | Request rate limit exceeded |
| 500 | Internal server error |