Kling V3 Text to Image Serverless API

Photorealistic, print-ready images from text prompts.

~46.33s
POST /v2/kling-3-text2image · submit + poll
 1# pip install "segmind>=1.1.0"
 2# export SEGMIND_API_KEY="YOUR_API_KEY"
 3import segmind
 4
 5# Async (v2): submit to the queue and block until COMPLETED.
 6# run() returns the final result dict (600s deadline, 1.0s poll by default).
 7result = segmind.run(
 8    "kling-3-text2image",
 9    prompt="A majestic snow-capped mountain range at golden hour, reflected in a crystal-clear alpine lake, photorealistic, ultra detailed, cinematic lighting",
10    negative_prompt="blurry, low quality, distorted, watermark",
11    resolution="1K",
12    aspect_ratio="16:9",
13    output_format="png",
14)
15print(result["status"])                      # COMPLETED
16print(result.get("output"))                  # model output (e.g. media URL)
17print(result["metrics"]["inference_time"])   # server compute seconds
18
19# --- Or submit + poll manually (track request_id, control the cadence) ---
20from segmind import SegmindClient, InferenceFailed, InferenceTimeout
21
22client = SegmindClient()                      # reads SEGMIND_API_KEY
23payload = {
24    "prompt": "A majestic snow-capped mountain range at golden hour, reflected in a crystal-clear alpine lake, photorealistic, ultra detailed, cinematic lighting",
25    "negative_prompt": "blurry, low quality, distorted, watermark",
26    "resolution": "1K",
27    "aspect_ratio": "16:9",
28    "output_format": "png",
29}
30job = client.submit_async("kling-3-text2image", **payload)
31print(job.request_id)                         # available immediately
32try:
33    result = job.wait(timeout=600, interval=1.0)
34except InferenceTimeout as e:
35    print("still running:", e.request_id)
36except InferenceFailed as e:
37    print("failed:", e.detail)

API Endpoint

POSThttps://api.segmind.com/v1/kling-3-text2image

Parameters

promptrequired
string

Describe the desired output. Use parentheses like (element1) to reference elements.

aspect_ratiooptional
string

Frame dimensions for the output image.

Default: "16:9"
Allowed values :
"16:9""9:16""1:1""4:3""3:4""3:2""2:3"
elementsoptional
object[]

Character/object elements to include. Reference in prompt with parentheses like (element1). Max 10 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.

negative_promptoptional
string

Describe elements that should be avoided in the generated image.

output_formatoptional
string

Select output format. Use png for best quality, jpeg for smaller files.

Default: "png"
Allowed values :
PNG"png"
JPEG"jpeg"
WebP"webp"
resolutionoptional
string

Output resolution. 1K for standard, 2K for higher quality.

Default: "1K"
Allowed values :
"1K""2K"

Response Type

Returns: Text/JSON

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-text2image

    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