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Seedance 2.0 Fast

POSThttps://api.newportai.com/api/async/seedance_2.0

The Seedance 2.0 Fast Text To Video API generates videos directly from a text prompt with faster generation speed, supporting resolutions up to 720p, configurable aspect ratio and duration, and optional audio generation.

  • Submit a POST request to the Seedance 2.0 Fast API to obtain a taskId.
  • Submit a POST request to the Polling API to retrieve the generated video results.
  • Configure a Callback URL to receive results automatically on completion.

Request Headers

Content-Type string Required

Enum: application/json

Authorization string Required

Bearer authentication token. Example: Bearer {{APIKey}}.

Request Body

model string Required

Model version. Available options: seedance-2.0-fast.

prompt string Required

Text prompt describing the video content to generate.

resolution string Required

Video resolution. Available options: 480p, 720p.

ratio string

Aspect ratio. Default: adaptive (automatically adjusts based on content). Available options: adaptive, 16:9, 9:16, 1:1, 3:4, 4:3.

duration integer Required

Video duration in seconds. Range: [4-15] seconds.

seed integer

Random seed for reproducible results. Default: -1 (random seed).

generateAudio boolean

Whether to generate audio for the video. Default: false.

Response

code integer

Returns 0 for success, or a specific error code.

message string

Returns "success" or a descriptive error message.

data object
taskId string

The unique identifier for the task. Use this ID with the Polling API to retrieve the generated output.

Errors

10192Illegal param

Polling

Use the Polling API to retrieve the processing results.

Callback

Alternatively, you can enable Callback to receive task results automatically upon completion.

0Task Completed
{
    "code": 0,
    "message": "success",
    "data": {
        "task": {
            "taskId": "b08337dc08d7428daa64b3d5e61b8350",
            "status": 3,
            "executionTime": 468854,
            "expire": 1778311264178,
            "taskType": "seedance_2.0"
        },
        "videos": [
            {
                "videoUrl": "https://dreamface-resource-cv.oss-accelerate.aliyuncs.com/talking-face/2026-05-09/7458762962984660992.mp4",
                "videoType": "mp4"
            }
        ]
    }
}
Request
cURL
curl -X POST 'https://api.newportai.com/api/async/seedance_2.0' \
  -H 'Content-Type: application/json' \
  -H 'Authorization: Bearer {{key}}' \
  -d '{
  "model": "seedance-2.0-fast",
  "prompt": "A girl dancing in a park on a sunny day with trees and benches in the background",
  "resolution": "720p",
  "ratio": "adaptive",
  "duration": 8,
  "seed": -1,
  "generateAudio": false
}'
0Successful
{
    "code": 0,
    "message": "success",
    "data": {
        "taskId": "b08337dc08d7428daa64b3d5e61b8350"
    }
}