# Hailuo 02 API

> Hailuo 02 — high-quality AI video generation.

- **Provider**: Hailuo
- **Model id**: `hailuo-02-image-to-video-standard`
- **Modality**: video
- **Price**: 1.39–3.59 credits /sec

## Overview

Hailuo 02 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: `hailuo-02-image-to-video-standard` |
| input | object | Yes | Input parameters object (see below) |
| callbackUrl | string | No | https URL we POST the finished task to. Signed with `X-Webhook-Signature` once you create a webhook signing key in Dashboard → Settings |

### input object parameters

| Parameter | Type | Required | Description |
|-----------|------|----------|-------------|
| prompt | string | Yes | The text prompt describing the video to generate Max 1500 characters. (example: Animate the frame with a gentle parallax drift across a rooftop garden at blue hour, string lights swaying in the breeze as distant skyscraper windows flicker… — full value in the request example) |
| image_url | string | Yes | The URL of the image to use as the first frame of the video (image URL) |
| end_image_url | string | No | Optional URL of the image to use as the last frame of the video (image URL) |
| duration | string | No | The duration of the video in seconds. 10 seconds videos are not supported for 1080p resolution. (options: 6 \| 10) (default: 10) |
| resolution | string | No | The resolution of the generated video. (options: 512P \| 768P) (default: 768P) |
| prompt_optimizer | boolean | No | Whether to use the model's prompt optimizer (true/false) (default: true) |
| nsfw_checker | boolean | No | A configurable parameter. Defaults to true in the Playground. (true/false) (default: true) |

### Request example

```json
{
  "modelId": "hailuo-02-image-to-video-standard",
  "input": {
    "prompt": "Animate the frame with a gentle parallax drift across a rooftop garden at blue hour, string lights swaying in the breeze as distant skyscraper windows flicker on one by one.",
    "image_url": "https://you.bot/examples/grok-imagine-text-to-image.jpg",
    "end_image_url": "https://you.bot/examples/grok-imagine-text-to-image.jpg",
    "duration": "10",
    "resolution": "768P",
    "prompt_optimizer": true,
    "nsfw_checker": true
  }
}
```

### Response example

```json
{
  "taskId": "281e5b0…f39b9",
  "creditsCharged": 35.88
}
```

## Query Task

`GET https://you.bot/api/v1/task/{taskId}?model=hailuo-02-image-to-video-standard`

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 |
| 403 | IP not allowed for this key, or the key is restricted to other models |
| 404 | Task not found, or it has expired |
| 409 | Duplicate request — an identical submit arrived moments ago. Nothing was charged; retry is safe |
| 413 | Payload too large — see the character and file-size limits for this model |
| 429 | Rate limit exceeded — retry after the Retry-After header |
| 500 | Internal server error |
| 504 | Upstream timed out — nothing was delivered; retry is safe |