Kling 3.0 Standard Text-to-Video Serverless API
Stunning 1080p cinematic videos from simple text prompts.
POST /v2/kling-3-standard-text2video · 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": "Slow cinematic push-in through an empty ancient temple. Fog drifts lazily through the valley below. Golden light catches dust particles floating between stone pillars.",
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}
17job = client.submit_async("kling-3-standard-text2video", **payload)
18print(job.request_id) # available immediately
19try:
20 result = job.wait(timeout=900, interval=2.0)
21 print(result["status"]) # COMPLETED
22 print(result.get("output")) # model output (e.g. video URL)
23except InferenceTimeout as e:
24 print("still running:", e.request_id) # re-poll later with this id
25except InferenceFailed as e:
26 print("failed:", e.detail)
27
28# Fast models (<=600s) can use the one-liner instead:
29# result = segmind.run("kling-3-standard-text2video", **payload) 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": "Slow cinematic push-in through an empty ancient temple. Fog drifts lazily through the valley below. Golden light catches dust particles floating between stone pillars.",
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}
17job = client.submit_async("kling-3-standard-text2video", **payload)
18print(job.request_id) # available immediately
19try:
20 result = job.wait(timeout=900, interval=2.0)
21 print(result["status"]) # COMPLETED
22 print(result.get("output")) # model output (e.g. video URL)
23except InferenceTimeout as e:
24 print("still running:", e.request_id) # re-poll later with this id
25except InferenceFailed as e:
26 print("failed:", e.detail)
27
28# Fast models (<=600s) can use the one-liner instead:
29# result = segmind.run("kling-3-standard-text2video", **payload)API Endpoint
https://api.segmind.com/v1/kling-3-standard-text2videoParameters
promptrequiredstringDescribe the video content. Be detailed about actions, camera movements, lighting.
aspect_ratiooptionalstringAspect ratio of the generated video.
"16:9""16:9""9:16""1:1"cfg_scaleoptionalnumberPrompt adherence strength. Higher values follow the prompt more closely.
0.5Range: 0 - 1durationoptionalstringLength of the output video in seconds.
"5""3""4""5""6""7""8""9""10""11""12"+3 moregenerate_audiooptionalbooleanGenerate synchronized audio. Supports Chinese and English.
truemulti_promptoptionalobject[]Multi-shot video generation. Each segment has its own prompt and duration. Max 5 segments.
promptrequiredstringPrompt for this video segment. Max 512 characters.
durationoptionalstringDuration for this segment in seconds.
"5"negative_promptoptionalstringSpecify elements to avoid. E.g. blur, distort, low quality.
"blur, distort, and low quality"shot_typeoptionalstringCamera shot type.
"customize"voice_idsoptionalstring[]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
POST /v2/kling-3-standard-text2videoSubmit — returns request_id, status_url, response_url
- 2
GET /v2/requests/{id}/statusPoll — until COMPLETED or FAILED
- 3
GET /v2/requests/{id}Result — final response body
Status states
- 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.
Bad Request
Invalid parameters or request format
Unauthorized
Missing or invalid API key
Forbidden
Insufficient permissions
Not Found
Model or endpoint not found
Insufficient Credits
Not enough credits to process request
Rate Limited
Too many requests
Server Error
Internal server error
Bad Gateway
Service temporarily unavailable
Timeout
Request timed out