Bytedance Seedance 1.5 Pro

This page is generated from the upstream official OpenAPI documentation. Endpoints, parameters and examples match the official docs; brand and API domain are replaced with ModelFold.

Endpoint

POST /jobs/createTask

Full URL: https://ai.modelfold.online/v1/jobs/createTask

Authentication: every request must include the Authorization: Bearer <API_KEY> header.

Query Task Status

After submitting a task, use the unified query endpoint to check progress and retrieve results:

Get Task Details — Learn how to query task status and retrieve generation results

TIP

For production use, we recommend using the callBackUrl parameter to receive automatic notifications when generation completes, rather than polling the status endpoint.

Key Features

Text-to-Video — Generate videos directly from text descriptions without input images
Image-to-Video — Animate static images with 0-2 input images support
Dynamic Camera — Advanced camera movement with optional lens locking for stable shots
Audio Generation — Optional audio generation for enhanced video content ::: note Audio Generation: Enabling the generate_audio feature will increase the generation cost. Use it when audio is essential for your video content. :::

TIP

With audio, the per-second price is twice the silent price. For current prices, see ai.modelfold.online/pricing.

Market Overview — Explore all available models
Common API — Check credits and account usage

Request Parameters

Body (application/json)

Parameter	Type	Required	Description
`model`	`string`	Yes	The model name to use for generation. Required field. - Must be `bytedance/seedance-1.5-pro` for this endpoint Default：`"bytedance/seedance-1.5-pro"`。 Allowed values：`bytedance/seedance-1.5-pro`。示例：`bytedance/seedance-1.5-pro`。
`callBackUrl`	`string`	No	The URL to receive generation task completion updates. Optional but recommended for production use. - System will POST task status and results to this URL when generation completes - Callback includes generated content URLs and task information - Your callback endpoint should accept POST requests with JSON payload containing results - Alternatively, use the Get Task Details endpoint to poll task status - To ensure callback security, see Webhook Verification Guide for signature verification implementation 示例：`https://your-domain.com/api/callback`。
`input`	`object`	No	Input parameters for the generation task
`input.prompt`	`string`	Yes	The text prompt used to generate the video. Required field. (Min length: 3, Max length: 20000 characters) 示例：`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`。
`input.input_urls`	`array<string>`	No	URLs of input images for image-to-video generation. Optional field. - Accepts 0-2 images - If not provided, the model will perform text-to-video generation - File URLs after upload, not file content - Accepted types: image/jpeg, image/png, image/webp - Max size per image: 10.0MB
`input.aspect_ratio`	`string`	Yes	Required. One of 1:1, 4:3, 3:4, 16:9, 9:16, 21:9. Allowed values：`1:1` / `4:3` / `3:4` / `16:9` / `9:16` / `21:9`。示例：`1:1`。
`input.resolution`	`string`	No	Video resolution - 480p for faster generation, 720p for balance, 1080p for higher quality Default：`"720p"`。 Allowed values：`480p` / `720p` / `1080p`。示例：`720p`。
`input.duration`	`number`	Yes	Required. Output length in whole seconds, 4–12.
`input.fixed_lens`	`boolean`	No	Seedance adds dynamic camera movement. Enable this feature to lock the camera for stable, static shots. - true: Lock camera for static shots - false: Allow dynamic camera movement Default：`false`。示例：`false`。
`input.generate_audio`	`boolean`	No	Whether to generate synchronized audio. Default: true. Pass false for a silent video. Audio doubles the per-second price. Default：`true`。示例：`false`。
`input.nsfw_checker`	`boolean`	No	Defaults to false. When false, no additional content filtering is applied and results are returned directly by the model.

Request Example

bash

curl -X POST "https://ai.modelfold.online/v1/jobs/createTask" \
  -H "Authorization: Bearer $MODELFOLD_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "bytedance/seedance-1.5-pro",
  "callBackUrl": "https://your-domain.com/api/callback",
  "input": {
    "prompt": "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",
    "input_urls": [
      "https://example.com/your-image.png"
    ],
    "aspect_ratio": "1:1",
    "resolution": "720p",
    "duration": 8,
    "fixed_lens": false,
    "generate_audio": false,
    "nsfw_checker": false
  }
}'

json

{
  "model": "bytedance/seedance-1.5-pro",
  "callBackUrl": "https://your-domain.com/api/callback",
  "input": {
    "prompt": "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",
    "input_urls": [
      "https://example.com/your-image.png"
    ],
    "aspect_ratio": "1:1",
    "resolution": "720p",
    "duration": 8,
    "fixed_lens": false,
    "generate_audio": false,
    "nsfw_checker": false
  }
}

Response

200 — Request successful

json

{
  "code": 200,
  "msg": "success",
  "data": {
    "taskId": "task_bytedance_1765186743319"
  }
}

Callback

videoTaskCompleted

Callback URL: {request.body#/callBackUrl} (the callBackUrl in the request body).

The system sends this callback when the bytedance/seedance-1.5-pro task succeeds or fails.

Callback body parameters

参数	类型	必填	说明
`code`	`integer`	是	Unified callback code: 200 for success, 501 for failure. Allowed values：`200` / `501`。示例：`200`。
`msg`	`string`	是	Unified callback message. Allowed values：`Playground task completed successfully.` / `Playground task failed.`。示例：`Playground task completed successfully.`。
`data`	`object`	是	—
`data.taskId`	`string`	是	The unique task identifier.
`data.model`	`string`	是	The model used for the task. Allowed values：`bytedance/seedance-1.5-pro`。示例：`bytedance/seedance-1.5-pro`。
`data.state`	`string`	是	Terminal task state. Allowed values：`success` / `fail`。示例：`success`。
`data.param`	`string`	是	JSON string containing the submitted task parameters.
`data.resultJson`	`string`	否	JSON string containing resultUrls, firstFrameUrl, lastFrameUrl, or resultObject when successful. Present only when state is success.
`data.failCode`	`string`	否	Failure code, a numeric string such as "400" or "500". Present only when state is fail.
`data.failMsg`	`string`	否	Failure reason. Present only when state is fail.
`data.costTime`	`integer`	否	Processing time in seconds. Present on both success and failure callbacks.
`data.completeTime`	`integer`	否	Task completion timestamp.
`data.createTime`	`integer`	否	Task creation timestamp.
`data.updateTime`	`integer`	否	Use completeTime as the completion time; updateTime may equal createTime.
`data.creditsConsumed`	`number`	否	Credits consumed by the task; 0 for failed tasks.

Task completed successfully

json

{
  "code": 200,
  "msg": "Playground task completed successfully.",
  "data": {
    "taskId": "task_example_video_webhook_001",
    "model": "bytedance/seedance-1.5-pro",
    "state": "success",
    "param": "{\"input\":\"{\\\"prompt\\\":\\\"A serene beach at sunset with waves gently crashing on the shore, palm trees swaying in the breeze, and seagulls flyi...\\\",\\\"input_urls\\\":[\\\"https://example.com/input-image.jpg\\\"],\\\"aspect_ratio\\\":\\\"1:1\\\",\\\"resolution\\\":\\\"720p\\\",\\\"duration\\\":8,\\\"fixed_lens\\\":false,\\\"generate_audio\\\":false,\\\"nsfw_checker\\\":false}\",\"callBackUrl\":\"https://example.com/callback\",\"model\":\"bytedance/seedance-1.5-pro\"}",
    "resultJson": "{\"resultUrls\":[\"https://example.com/generated-video.mp4\"]}",
    "costTime": 12,
    "completeTime": 1234567890,
    "createTime": 1234560000,
    "updateTime": 1234567890,
    "creditsConsumed": 1.23
  }
}

Task failed

json

{
  "code": 501,
  "msg": "Playground task failed.",
  "data": {
    "taskId": "task_example_video_webhook_001",
    "model": "bytedance/seedance-1.5-pro",
    "state": "fail",
    "param": "{\"input\":\"{\\\"prompt\\\":\\\"A serene beach at sunset with waves gently crashing on the shore, palm trees swaying in the breeze, and seagulls flyi...\\\",\\\"input_urls\\\":[\\\"https://example.com/input-image.jpg\\\"],\\\"aspect_ratio\\\":\\\"1:1\\\",\\\"resolution\\\":\\\"720p\\\",\\\"duration\\\":8,\\\"fixed_lens\\\":false,\\\"generate_audio\\\":false,\\\"nsfw_checker\\\":false}\",\"callBackUrl\":\"https://example.com/callback\",\"model\":\"bytedance/seedance-1.5-pro\"}",
    "failCode": "400",
    "failMsg": "<error detail>",
    "costTime": 12,
    "creditsConsumed": 0
  }
}

Bytedance Seedance 1.5 Pro ​

Endpoint ​

Query Task Status ​

Key Features ​

Related Resources ​

Request Parameters ​

Body (application/json) ​

Request Example ​

Response ​

200 — Request successful ​

Callback ​

videoTaskCompleted ​

Bytedance Seedance 1.5 Pro

Endpoint

Query Task Status

Key Features

Related Resources

Request Parameters

Body (application/json)

Request Example

Response

200 — Request successful

Callback

videoTaskCompleted