# Seedance V1 API

> Seedance V1 — high-quality AI video generation.

- **Provider**: ByteDance
- **Model id**: `bytedance-v1-pro-image-to-video`
- **Modality**: video
- **Price**: 1.5–7.49 credits /sec

## Overview

Seedance V1 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: `bytedance-v1-pro-image-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 | The text prompt used to generate the video (default: Slow cinematic push-in, gentle ambient motion, softly shifting light, and subtle parallax for a lifelike, atmospheric feel.) |
| image_url | string | Yes | The URL of the image used to generate video (image URL) |
| resolution | string | No | Video resolution - 480p for faster generation, 720p for balance, 1080p for higher quality (options: 480p | 720p | 1080p) (default: 720p) |
| duration | string | No | Duration of the video in seconds (options: 5 | 10) (default: 5) |
| camera_fixed | boolean | No | Whether to fix the camera position (true/false) (default: false) |
| seed | number | No | Random seed to control video generation. Use -1 for random. (range -1-2147483647) (default: -1) |
| enable_safety_checker | boolean | No | The safety checker is always enabled in Playground. It can only be disabled by setting false through the API. (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": "bytedance-v1-pro-image-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.",
    "image_url": "https://example.com/input.jpg",
    "resolution": "720p",
    "duration": "5",
    "camera_fixed": false,
    "seed": "-1",
    "enable_safety_checker": true,
    "nsfw_checker": true
  }
}
```

### Response example

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

## Query Task

`GET https://you.bot/api/v1/task/{taskId}?model=bytedance-v1-pro-image-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 |