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Wan 2.7 Video Extend

Wan 2.7 Video Extend is the video extension capability of Alibaba's Wan2.7-Video series, released April 2026: it predicts and generates continuous content from an input clip or frame, extending either forward from the first frames or backward from the last.

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API DOCS / SIMPLIFIED

Integrate this model with one task-based API flow

Wan 2.7 Video Extend is the video extension capability of Alibaba's Wan2.7-Video series, released April 2026: it predicts and generates continuous content from an input clip or frame, extending either forward from the first frames or backward from the last. The examples below are rendered from Wan 2.7 Video Extend, the current gateway base URL, and the selected public model contract using the active example "The man was singing, and passersby applauded and gave him some change.".

X-API-Key on every request
POST /api/v1/openapi/task
GET /api/v1/openapi/task/status/{task_id}
Async task workflow

Single code window

Switch language once. Each example already includes both the task creation request and the task status polling request.

Unified Example
API_KEY="<API_KEY>"
BASE_URL="https://api.musespark.ai"
REQUEST_BODY='{
  "model_id": "wan-2-7-video-extend",
  "parameters": {
    "video": "<VIDEO_URL>",
    "audio": "<AUDIO_URL>",
    "prompt": "The man was singing, and passersby applauded and gave him some change.",
    "resolution": "720p",
    "duration": 5,
    "batch_size": 1
  }
}'

CREATE_RESPONSE=$(curl --request POST "$BASE_URL/api/v1/openapi/task" \
  --header "X-API-Key: $API_KEY" \
  --header "Content-Type: application/json" \
  --data-raw "$REQUEST_BODY")

TASK_ID="<TASK_ID_FROM_CREATE_RESPONSE>"

curl "$BASE_URL/api/v1/openapi/task/status/$TASK_ID" \
  --header "X-API-Key: $API_KEY"

Request and response JSON become the documentation

Keep the payload and task status envelope as the primary contract. Field descriptions, optionality, and enum hints now live inline as JSON comments.

Request Body

Caller payload

This is the request envelope accepted by the public gateway for the selected model contract.

Field comments and caller parameters come directly from the current item's model schema.
{
"model_id": "wan-2-7-video-extend",// target model
"parameters": {
"video": "<VIDEO_URL>",// video for generating the output · accept video/*
"audio": "<AUDIO_URL>",// audio URL to guide generation (optional) · accept audio/*
"prompt": "The man was singing, and passersby applauded and gave him some change.",// positive prompt for the generation
"resolution": "720p",// resolution of the generated media · enum: 720p | 1080p
"duration": 5,// total duration of the final output video in seconds (5-15s) · min 5 · max 15
"batch_size": 1// standard quantity control field. The allowed range for this item is 1-4 · min 1 · max 4
}
}
Response Body

Gateway response

This is the task status response you will query with task_id until the task reaches a terminal state.

Poll every 2-5 seconds and stop once status becomes completed, failed, cancelled.
{
"code": 200,// 200 on success
"msg": "success",
"data": {
"task_id": "task_01HQX8N2QJ0YQ8Q0T7G6N4V6K2",// use for status polling
"status": "completed",// enum: queued | running | completed | failed | cancelled
"progress": 100,// 0-100 if available
"completed_at": 1760000000,// unix timestamp
"expires_at": 1760001800,// unix timestamp
"result": {
"output_urls": [// generated files
"https://cdn.example.com/output.png"
]
}
}
}