Kling Extend Video

Live

videoedit

Extend a previously generated Kling video by its video_id.

Endpoint

POSThttps://brahmand-api.bulletshorts.co/v1/video/kling-extend-video

Authenticate with the X-API-Key request header.

Pricing

19 credits / sec1 credit = ₹1. Billed on success: per second of output.

Price varies by resolution — pass resolution in your request. Credit cost per second:

resolution	credits / sec	vs base
720p	19	1×
1080p	30	1.6×

List price. Volume / bulk customers get a discounted rate — contact us for account pricing.

Parameters

Name	Type	Required	Description	Default / options
video_id	string	required	ID of a prior Kling video to extend.	—
prompt	string	optional	Optional prompt guiding the extension.	—
negative_prompt	string	optional	Text describing what to avoid in the video.	—
cfg_scale	number	optional	Prompt-adherence / freedom level, 0-1 (default 0.5). May be ignored by Kling 2.x/3.0.	—
callback_url	string	optional	Webhook URL notified when the task completes.	—

Request

curl

curl -X POST https://brahmand-api.bulletshorts.co/v1/video/kling-extend-video \
  -H "X-API-Key: $TRINETRA_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"video_id":"kling_vid_xyz789","prompt":"the camera pulls back to reveal a crowd"}'

request body (JSON)

{
  "video_id": "kling_vid_xyz789",
  "prompt": "the camera pulls back to reveal a crowd"
}

Response

Submitting a job returns 202 Accepted with a job id. Poll GET /v1/jobs/{id} until the job reaches a terminal state, or register a webhook to be notified.

202 Accepted

{
  "job_id": "job_klingextendvideo_a1b2c3",
  "status": "queued"
}

GET /v1/jobs/{id} → succeeded

{
  "id": "job_klingextendvideo_a1b2c3",
  "model": "kling-extend-video",
  "status": "succeeded",
  "output": {
    "outputs": [
      {
        "url": "https://cdn.trinetra.ai/out/kling-extend-video/a1b2c3.mp4",
        "type": "video"
      }
    ]
  },
  "credits_charged": 10
}

Webhook: set a webhook_url on your API key to receive a POST with the terminal job document instead of polling.