Seedance 2.0 Fast

Seedance 2.0-fast offers rapid video generation. It generates 4-15 second videos with text prompts, supports various aspect ratios, audio generation, and enhanced web search capabilities.

Base URL

https://api.icreat.ai

Authentication

All API requests must be authenticated with an API Key. You can obtain an API Key from the console.

export ICREAT_API_KEY="your-api-key-here"

HTTP Request Headers

import os

API_KEY = os.environ.get("ICREAT_API_KEY")
headers = {
    "Content-Type": "application/json",
    "Authorization": "Bearer " + API_KEY,
}

Protect your API Key

Never expose your API Key in client-side code or public repositories. Use environment variables or a backend proxy.

Code Examples

Image and video generation uses a three-step async flow: submit to get task_id, poll status, then fetch results when status is SUCCEEDED.

1. Submit Task

Send a generation request to the submit endpoint.

POST/v1/task/submit/bytedance/seedance-2-0-fast

curl --fail-with-body --connect-timeout 10 --max-time 60 \
  -X POST https://api.icreat.ai/v1/task/submit/bytedance/seedance-2-0-fast \
  -H "Authorization: Bearer ${ICREAT_API_KEY}" \
  -H "Content-Type: application/json" \
  -d '{
  "content": [
    {
      "type": "text",
      "text": "A golden retriever running on a beach at sunset in slow motion"
    }
  ],
  "ratio": "16:9",
  "resolution": "1080p",
  "duration": 5
}'

2. Poll Status

Poll with task_id. Response contains only status.

POST/v1/task/query-status

curl --connect-timeout 10 --max-time 60 \
  -X POST "https://api.icreat.ai/v1/task/query-status" \
  -H "Authorization: Bearer ${ICREAT_API_KEY}" \
  -H "Content-Type: application/json" \
  -d '{
  "task_id": "task-xxx"
}'

3. Get Result

Fetch output when the task succeeds.

POST/v1/task/get-result

curl --connect-timeout 10 --max-time 60 \
  -X POST "https://api.icreat.ai/v1/task/get-result" \
  -H "Authorization: Bearer ${ICREAT_API_KEY}" \
  -H "Content-Type: application/json" \
  -d '{
  "task_id": "task-xxx"
}'

Input Schema

Submit Task — Input

Total: 9 Required: 2 Optional: 7

contentobject[]required

An array of multimodal content. See the schema below

generate_audioboolean

Whether to generate audio

ratiostring

Output aspect ratio. Supported values: 16:9, 4:3, 1:1, 3:4, 9:16, 21:9, and adaptive. When set to adaptive, the model automatically selects the most suitable aspect ratio based on the input

resolutionstring

Output resolution. Supported values: 480p, 720p

durationinteger

Video duration in seconds. Accepts an integer from 4 to 15, or -1 to let the model select the duration automatically

watermarkboolean

Whether to add an “AI Generated” watermark

toolsobject[]

A list of tools to use

typestringrequired

Content type: text, image_url, video_url, or audio_url

need_reviewboolean

Whether to submit the reference for official review. Set this to true when the reference contains faces or copyrighted IP

Poll Status — Input

Total: 1 Required: 1 Optional: 0

task_idstringrequired

Task ID from the submit endpoint.

Get Result — Input

Total: 1 Required: 1 Optional: 0

task_idstringrequired

Task ID from the submit endpoint.

Output Schema

Submit Task — Output

Total: 1

task_idstring

Async task identifier.

Poll Status — Output

Total: 1

statusstring

Current task status. Fetch results when SUCCEEDED.

Get Result — Output

Top-level array of resource objects.

Total: 3

typestring

Resource type; Video for this model.

urlstring

Preview/access URL.

download_urlstring

Download URL.

LLM Prompt

The Markdown below is an LLM-friendly prompt you can paste into AI assistants (e.g. Cursor, ChatGPT) to help them understand this model's API, call flow, and key parameters. Use Copy for AI or copy from the code block below.

# bytedance/seedance-2-0-fast

> Seedance 2.0-fast offers rapid video generation.

## Overview

Use the iCreat three-step async task API: submit a generation request, poll status, then fetch the video URL on success.

## API Info

- **Base URL**：`https://api.icreat.ai`
- **Submit endpoint (POST)**：`/v1/task/submit/bytedance/seedance-2-0-fast`
- **Poll endpoint (POST)**：`/v1/task/query-status`
- **Get result endpoint (POST)**：`/v1/task/get-result`
- **Model ID**：`bytedance/seedance-2-0-fast`
- **Auth**：`Authorization: Bearer ${ICREAT_API_KEY}`

## Call Flow

1. **Submit**: POST submit path with body per Input Notes; response `{ "task_id": "..." }`
2. **Poll**: POST `/v1/task/query-status` with `{ "task_id": "..." }`; response contains **only** `{ "status": "SUBMITTED|SUCCEEDED|FAILED" }`
3. **Get result**: when `status` is `SUCCEEDED`, POST `/v1/task/get-result`; top-level array; read `url` or `download_url` when `type` is `Video`

### Input Notes

- Request body centers on a multimodal `content` array plus resolution/duration params
- `generate_audio` (optional): Whether to generate audio
- `ratio` (optional): Output aspect ratio. Supported values: `16:9`, `4:3`, `1:1`, `3:4`, `9:16`, `21:9`, and `adaptive`. When set to `adaptive`, the model automatically selects the most suitable aspect ratio based on the input
- `resolution` (optional): Output resolution. Supported values: `480p`, `720p`
- `duration` (optional): Video duration in seconds. Accepts an integer from `4` to `15`, or `-1` to let the model select the duration automatically
- `watermark` (optional): Whether to add an “AI Generated” watermark
- `tools` (optional): A list of tools to use
- `need_review` (optional): Whether to submit the reference for official review. Set this to `true` when the reference contains faces or copyrighted IP

### Output Notes

- Poll: read `status` only
- Result: top-level `[{ "type": "Video", "url": "...", "download_url": "..." }]`

## Notes

- Use the same `task_id` across all three steps; do not skip polling
- `FAILED` is terminal — check request parameters or reference media