# Seedance 2.5 API Documentation

> Generate videos with the Seedance 2.5 model through the AI Studio API.

## Overview

Use the AI Studio API to create Seedance 2.5 generation tasks and query their status. The flow is asynchronous: create a task first, then poll the task endpoint with the returned `taskId`.

## Authentication

All requests require an API key in the `Authorization` header.

```http
Authorization: Bearer YOUR_API_KEY
```

## Available models

| modelId | Version | Provider | Runtime model |
| --- | --- | --- | --- |
| `video:bytedance-seedance-2-5` | Seedance 2.5 | Bytedance Seedance 2.5 | bytedance/seedance-2-5 |

## 1. Create generation task

### Endpoint

```http
POST https://localhost:3000/api/ai-studio/execute
Content-Type: application/json
Authorization: Bearer YOUR_API_KEY
```

### Request example

```json
{
  "modelId": "video:bytedance-seedance-2-5",
  "isPublic": true,
  "payload": {
    "model": "bytedance/seedance-2-5",
    "input": {
      "prompt": "A cinematic product reveal with smooth orbit camera movement"
    }
  }
}
```

### Success response

```json
{
  "success": true,
  "data": {
    "modelId": "video:bytedance-seedance-2-5",
    "generationId": "generation-id",
    "reservedCredits": 20,
    "taskId": "provider-task-id",
    "state": "queued"
  }
}
```

## 2. Query task status

### Endpoint

```http
GET https://localhost:3000/api/ai-studio/tasks/{taskId}
Authorization: Bearer YOUR_API_KEY
```

### Success response

```json
{
  "success": true,
  "data": {
    "generationId": "generation-id",
    "taskId": "provider-task-id",
    "modelId": "video:bytedance-seedance-2-5",
    "state": "succeeded",
    "mediaUrls": [
      "https://example.com/result.mp4"
    ],
    "reservedCredits": 20,
    "refundedCredits": 0
  }
}
```

## Request fields

### Seedance 2.5

#### Payload fields

| Field | Type | Required | Default / Example | Options | Description |
| --- | --- | --- | --- | --- | --- |
| `model` | enum | Yes | `"bytedance/seedance-2-5"` | bytedance/seedance-2-5 | The model name to use for generation. Required field. - Must be `bytedance/seedance-2-5` for this endpoint |
| `input` | object | Yes | `-` | - | Input parameters for the generation task |

#### Input fields

| Field | Type | Required | Default / Example | Options | Description |
| --- | --- | --- | --- | --- | --- |
| `prompt` | string | No | `"A serene beach at sunset with waves gently crashing on the shore, palm trees swaying in the breeze, and seagulls flying across the orange sky"` | - | The text prompt used to generate the video.. ( Max length: 30000 characters) |
| `first_frame_url` | string | No | `-` | - | First frame image url or asset://{assetId} (for example: asset://asset-20260404242101-76djj)<br>Cannot be used simultaneously with reference_image_urls, reference_video_urls, or reference_audio_urls. |
| `last_frame_url` | string | No | `-` | - | End frame image url or asset://{assetId} (for example: asset://asset-20260404242101-76djj)<br>last_frame_url cannot be passed alone; first_frame_url must be provided together with it. |
| `reference_image_urls` | string[] | No | `["https://file.aiquickdraw.com/custom-page/akr/section-images/example1.png"]` | - | Enter a list of image URLs or asset://{assetId} (for example: asset://asset-20260404242101-76djj).<br>Single image requirements:<br>Format: jpeg, png, webp, bmp, tiff, gif.<br>Aspect ratio (width/height): (0.4, 2.5)<br>Width and height (px): (300, 6000)<br>Size: Single image less than 30 MB.<br>Maximum number of files: The sum of the number of frames at the beginning and end must not exceed 30.<br>Mutually exclusive with the first/last-frame scenario; |
| `reference_video_urls` | string[] | No | `-` | - | Enter a list of video URLs or asset://{assetId} (for example: asset://asset-20260404242101-76djj) .<br>Single video requirements:<br>Video format: mp4, mov.<br>Resolution: 480p, 720p<br>Dimensions:<br>Aspect ratio (width/height): [0.4, 2.5]<br>Width/height (px): [300, 6000]<br>Total pixels: [640×640=409600, 834×1112=927408], i.e., the product of width and height must meet the range requirement of [409600, 927408].<br>Size: Single video not exceeding 200 MB.<br>Frame rate (FPS): [24, 60]<br>Single video duration: [2, 30] seconds; Mutually exclusive with the first/last-frame scenario; Total duration of reference videos must not exceed 30 seconds. |
| `reference_audio_urls` | string[] | No | `-` | - | Enter a list of audio URLs or asset://{assetId} (for example: asset://asset-20260404242101-76djj) .<br>Single audio requirements:<br>Format: wav, mp3<br>Size: Single audio file size not exceeding 15 MB.<br>Single audio duration: [2, 30] seconds; Mutually exclusive with the first/last-frame scenario; Total duration of reference videos must not exceed 30 seconds. |
| `return_last_frame` | boolean | No | `false` | - | Whether to return the last frame of the video. When draft=true, this parameter cannot be set to true. |
| `generate_audio` | boolean | No | `true` | - | Whether to generate audio for the video. - **true**: Generate with audio (higher cost)<br>- **false**: Generate without audio Note: Enabling audio will increase the generation cost |
| `resolution` | enum | No | `"720p"` | 480p, 720p | Video resolution - 480p for faster generation, 720p for balance. |
| `aspect_ratio` | enum | No | `"adaptive"` | 1:1, 4:3, 3:4, 16:9, 9:16, 21:9, adaptive | Video aspect ratio configuration. |
| `duration` | number | No | `5` | - | Video duration in seconds, from 4 to 30. |
| `output_format` | enum | No | `"mp4"` | mp4, mov | Video output format. |
| `web_search` | boolean | No | `-` | - | Enable online search? |
| `nsfw_checker` | boolean | No | `-` | - | Defaults to false. You can set it to false based on your needs. If set to false, our content filtering will be disabled, and all results will be returned directly by the model itself.<br>Note: There is no guarantee that everything can be filtered out; if you are not satisfied with the results, you will need to make your own arrangements. |

## Pricing

Credits are reserved when a generation task is created. The `reservedCredits` value in the create-task response is the final amount reserved for that request.

| Model | Type | Spec | Price | Billing |
| --- | --- | --- | --- | --- |
| Seedance 2.5 | Video to Video | 480p | 17 credits/s | (input + output) × 17 |
| Seedance 2.5 | Text/Image to Video | 480p | 28 credits/s | Output seconds × 28 |
| Seedance 2.5 | Video to Video | 720p | 38 credits/s | (input + output) × 38 |
| Seedance 2.5 | Text/Image to Video | 720p | 63 credits/s | Output seconds × 63 |

## Common errors

| Status | Meaning |
| --- | --- |
| `400` | Invalid request payload |
| `401` | Missing or invalid API key |
| `402` | Insufficient credits or plan limit |
| `404` | Model or task not found |
| `429` | Rate limit exceeded |
| `500` | Server error |