Kling 3.0 Standard Image-to-Video Serverless API

Controlled cinematic 1080p videos from starting images.

~108.62s
POST /v2/kling-3-standard-image2video · 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    "prompt": "The subject moves naturally with realistic physics and smooth camera motion.",
11    "duration": "5",
12    "cfg_scale": 0.5,
13    "aspect_ratio": "16:9",
14    "generate_audio": True,
15    "negative_prompt": "blur, distort, and low quality",
16    "start_image_url": "",
17}
18job = client.submit_async("kling-3-standard-image2video", **payload)
19print(job.request_id)                         # available immediately
20try:
21    result = job.wait(timeout=900, interval=2.0)
22    print(result["status"])                  # COMPLETED
23    print(result.get("output"))              # model output (e.g. video URL)
24except InferenceTimeout as e:
25    print("still running:", e.request_id)    # re-poll later with this id
26except InferenceFailed as e:
27    print("failed:", e.detail)
28
29# Fast models (<=600s) can use the one-liner instead:
30# result = segmind.run("kling-3-standard-image2video", **payload)

API Endpoint

POSThttps://api.segmind.com/v1/kling-3-standard-image2video

Parameters

promptrequired
string

Describe the motion and animation to create from the image.

start_image_urlrequired
string (uri)

Starting image to animate. This will be the first frame. Max 50MB.

aspect_ratiooptional
string

Aspect ratio of the generated video.

Default: "16:9"
Allowed values :
"16:9""9:16""1:1"
cfg_scaleoptional
number

Prompt adherence strength.

Default: 0.5Range: 0 - 1
durationoptional
string

Length of the output video in seconds.

Default: "5"
Allowed values (13 total):
"3""4""5""6""7""8""9""10""11""12"+3 more
elementsoptional
object[]

Character/object elements to include. Reference in prompt with @Element1, @Element2. Max 3 elements.

Array items:
frontal_image_urloptional
string (uri)

Frontal view image of the character or object.

reference_image_urlsoptional
string[]

Up to 3 reference images for this element.

end_image_urloptional
string (uri)

Ending image. Animation transitions from start to end. Max 50MB.

generate_audiooptional
boolean

Generate synchronized audio. Supports Chinese and English.

Default: true
multi_promptoptional
object[]

Multi-shot video generation. Each segment has its own prompt and duration. Max 5 segments.

Array items:
promptrequired
string

Prompt for this video segment. Max 512 characters.

durationoptional
string

Duration for this segment in seconds.

Default: "5"
negative_promptoptional
string

Specify elements to avoid.

Default: "blur, distort, and low quality"
shot_typeoptional
string

Camera shot type.

Default: "customize"
voice_idsoptional
string[]

Voice IDs for audio. Reference in prompt as <<<voice_1>>>, <<<voice_2>>>. Max 2. Get voice IDs from the Kling Create Voice endpoint: https://www.segmind.com/models/kling-create-voice

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-standard-image2video

    Submitreturns request_id, status_url, response_url

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

    Polluntil COMPLETED or FAILED

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

    Resultfinal response body

Status states

QUEUEDAccepted, waiting for a worker
PROCESSINGRunning on a worker
COMPLETEDDone — result body is ready
FAILEDErrored (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