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POST
/
v1
/
jobs
/
submit
Kling Extend 3.0 — Extend Video
curl --request POST \
  --url https://api.muvi.video/v1/jobs/submit \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "model": "<string>",
  "input": {
    "video_url": "<string>",
    "work_id": "<string>",
    "prompt": "<string>",
    "negative_prompt": "<string>",
    "quality": "<string>",
    "duration": "<string>"
  }
}
'
{
  "jobId": "<string>",
  "status": "<string>",
  "estimatedCompletionTime": "<string>",
  "costMicroCents": 123
}

Documentation Index

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Use this file to discover all available pages before exploring further.

Continue an existing video by generating new footage that follows on from the source clip with Kling Extend 3.0. Supports std/pro quality tiers and 5- or 10-second extensions.
PropertyValue
ProviderKling
ModelKling Extend 3.0
CapabilityExtend Video
Base Cost70,000 micro-cents/second ($0.07/sec)
Processing Time~240 seconds

​
Request Body

​
model
string
required
Model slug. Use kling/kling-extend-v3/extend-video.
​
input
object
required
Input parameters for video extension.
​
webhookUrl
string
HTTPS URL to receive a webhook notification when the job completes or fails.

​
Pricing

Base cost: 70,000 micro-cents per second ($0.07/sec) 
finalCost = baseCost × duration × quality
FactorOptionMultiplier
Duration55x
1010x
Qualitystd1x
pro1.5x
Default cost: 5 seconds, std quality = 70,000 × 5 × 1 = 350,000 micro-cents ($0.35)

​
Response

​
jobId
string
Unique identifier for the submitted job.
​
status
string
Initial job status. Always "pending" on successful submission.
​
estimatedCompletionTime
string
ISO 8601 timestamp of the estimated completion time.
​
costMicroCents
number
The cost of the job in micro-cents.

​
Code Examples

curl -X POST https://api.muvi.video/v1/jobs/submit \
  -H "Authorization: Bearer $PIXELBYTE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "kling/kling-extend-v3/extend-video",
    "input": {
      "video_url": "https://example.com/video.mp4",
      "prompt": "The character keeps walking forward into the open square",
      "quality": "std",
      "duration": "5"
    }
  }'