# Kling 3.0 API

> Cinematic text & image to video with native sound and multi-shot support.

- **Provider**: Kuaishou
- **Model id**: `kling-3-0`
- **Modality**: video
- **Price**: 7.95–38.92 credits /sec

## Overview

Kling 3.0 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: `kling-3-0` |
| 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 |
|-----------|------|----------|-------------|
| image_urls | string[] | No | Start Frame / End Frame |
| multi_shots | boolean | Yes | True/false (default: false) |
| sound | boolean | No | True/false (default: true) |
| prompt | string | Yes | Text value (default: A barista pours latte art in slow motion at a cozy window counter, morning light, steam curling.) |
| duration | number | Yes | Range 1-15 (default: 5) |
| kling_elements | object[] | No | Array of { name, description, media } |
| aspect_ratio | string | No | Options: 1:1 | 9:16 | 16:9 (default: 1:1) |
| mode | string | No | Generation mode. std has standard resolution, pro has higher resolution. (options: std | pro | 4K) (default: std) |

### Request example

```json
{
  "modelId": "kling-3-0",
  "input": {
    "image_urls": [
      "https://example.com/input.jpg"
    ],
    "multi_shots": false,
    "sound": true,
    "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": "5",
    "aspect_ratio": "1:1",
    "mode": "std"
  }
}
```

### Response example

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

## Query Task

`GET https://you.bot/api/v1/task/{taskId}?model=kling-3-0`

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 |