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v1

latestOpenAPI 3.1.0MIT2026-07-262861121.0 KB

Extend a Midjourney video using a task-based flow (taskId + index).

post/generate-video/extend

Request body

taskIdstring required

Run ID from the original Midjourney video request.

indexinteger required

Zero-based index of the Midjourney video to extend (0-3).

Example request

{
  "taskId": "vid_m1abc123def456",
  "index": 0
}

Response

Video extension request submitted successfully (asynchronous processing)

runIdstring required

Unique identifier for the video generation request

projectIdstring

Project identifier (for LongStories models)

status'pending' | 'processing' | 'completed' | 'failed' required

Current status of the generation

modelstring required

The model used for generation

costnumber

Cost of the video generation

paymentSourcestring

Payment source used (USD or XNO)

remainingBalancenumber

Remaining balance after the generation

prechargeLabelstring

Provider label for the precharge