Kling 3.0 Standard Motion Control API

Transfer reference-video motion onto a character image at 720p.

PlaygroundAPI
Pricing
~333.79s
POST /v2/kling-3-motion-control-standard · submit + poll
 1# pip install "segmind>=1.1.0"
 2# export SEGMIND_API_KEY="YOUR_API_KEY"
 3from segmind import SegmindClient, InferenceFailed, InferenceTimeout
 4
 5# Async (v2) — recommended for long-running / video models.
 6# run() blocks up to 600s; submit_async + job.wait(timeout=...) sets a longer
 7# deadline and keeps the request_id so you can re-poll later.
 8client = SegmindClient()                      # reads SEGMIND_API_KEY
 9payload = {
10    "image_url": "https://segmind-resources.s3.amazonaws.com/input/kling-3-mc-std-character-4c224715.jpg",
11    "video_url": "https://segmind-resources.s3.amazonaws.com/input/kling-3-mc-std-driving-17af71bf.mp4",
12    "prompt": "The martial artist performs the form on a grey flagstone temple courtyard, steady wide shot capturing the full figure.",
13    "character_orientation": "video",
14    "keep_original_sound": True,
15}
16job = client.submit_async("kling-3-motion-control-standard", **payload)
17print(job.request_id)                         # available immediately
18try:
19    result = job.wait(timeout=900, interval=2.0)
20    print(result["status"])                  # COMPLETED
21    print(result.get("output"))              # model output (e.g. video URL)
22except InferenceTimeout as e:
23    print("still running:", e.request_id)    # re-poll later with this id
24except InferenceFailed as e:
25    print("failed:", e.detail)
26
27# Fast models (<=600s) can use the one-liner instead:
28# result = segmind.run("kling-3-motion-control-standard", **payload)

API Endpoint

POSThttps://api.segmind.com/v1/kling-3-motion-control-standard

Parameters

image_urlrequired
string (uri)

The character image to animate. JPG or PNG up to 10 MB, aspect ratio between 1:2.5 and 2.5:1; a clear, well-lit full-body shot works best.

video_urlrequired
string (uri)

The reference video whose motion the character follows. MP4 or MOV up to 100 MB, 3 to 30 seconds (10 seconds when character_orientation is image). The output runs this clip's length and is billed per second of it.

character_orientationoptional
string

Whose facing direction the output keeps: 'video' follows the reference video (clips up to 30 s), 'image' keeps the image's pose (clips up to 10 s).

Default: "video"
Allowed values :
Video→"video"
Image→"image"
keep_original_soundoptional
boolean

Keep the reference video's audio track on the output.

Default: true
promptoptional
string

Optional scene description: add elements to the scene or describe camera movement. The motion itself comes from the video.

Response Type

Returns: Video

Asynchronous requests (v2)

Use Async for video, long-running (>~60s), or high-concurrency workloads; Sync is simplest for fast image & LLM calls. Async submits a request and you poll it to completion.

  1. 1
    POST /v2/kling-3-motion-control-standard

    Submit — returns request_id, status_url, response_url

  2. 2
    GET /v2/requests/{id}/status

    Poll — until COMPLETED or FAILED

  3. 3
    GET /v2/requests/{id}

    Result — final response body

Status states

QUEUED— Accepted, waiting for a worker
PROCESSING— Running on a worker
COMPLETED— Done — result body is ready
FAILED— Errored (incl. content/RAI blocks)
  • A FAILED request is served as HTTP 422 — the body still carries the error detail.
  • An unknown or expired request_id returns HTTP 404.
  • Results are retained for 1 hour, then expire.
  • Content / RAI blocks surface as FAILED, not a separate state.
  • Track completion by polling the status endpoint.

Common Error Codes

The API returns standard HTTP status codes. Detailed error messages are provided in the response body.

400

Bad Request

Invalid parameters or request format

401

Unauthorized

Missing or invalid API key

403

Forbidden

Insufficient permissions

404

Not Found

Model or endpoint not found

406

Insufficient Credits

Not enough credits to process request

429

Rate Limited

Too many requests

500

Server Error

Internal server error

502

Bad Gateway

Service temporarily unavailable

504

Timeout

Request timed out