Kling 3.0 API 使用教程：API Key、请求、轮询、首尾帧与多镜头

export SEEDROUTER_API_KEY="your-key"

curl https://api.seedrouter.ai/v1/videos/generations \
  -H "Authorization: Bearer $SEEDROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "kling-3-0",
    "prompt": "A red paper boat drifting on a calm pond at sunrise, soft mist on the water, slow push-in, no text, no logos.",
    "mode": "std",
    "duration": 5,
    "aspect_ratio": "16:9"
  }'

{"id": "task_...", "model": "kling-3-0", "status": "processing", "created_at": 1789689600}

import os
import time
import requests

API = "https://api.seedrouter.ai/v1"
HEADERS = {"Authorization": f"Bearer {os.environ['SEEDROUTER_API_KEY']}"}

task = requests.post(
    f"{API}/videos/generations",
    headers=HEADERS,
    json={
        "model": "kling-3-0",
        "prompt": "A red paper boat drifting on a calm pond at sunrise, slow push-in, no text, no logos.",
        "mode": "std",
        "duration": 5,
    },
    timeout=60,
)
task.raise_for_status()
task_id = task.json()["id"]

while True:
    result = requests.get(f"{API}/tasks/{task_id}", headers=HEADERS, timeout=60).json()
    if result["status"] in ("completed", "failed"):
        break
    time.sleep(15)

if result["status"] == "completed":
    print(result["output"]["video_url"])
else:
    print(result["error"])

{
  "id": "task_...",
  "model": "kling-3-0",
  "status": "completed",
  "output": {"video_url": "https://static.seedrouter.ai/media/tasks/task_example/0.mp4"}
}

{
  "model": "kling-3-0",
  "prompt": "The camera glides from the empty street to the lit shop window",
  "image_urls": ["https://example.com/start.png", "https://example.com/end.png"],
  "mode": "pro",
  "duration": 6
}

{
  "model": "kling-3-0",
  "mode": "pro",
  "sound": true,
  "multi_shots": true,
  "multi_prompt": [
    {"prompt": "Wide shot of a small open kitchen, a chef tosses vegetables in a wok, flames rising, warm light.", "duration": 3},
    {"prompt": "Close-up of the wok, vegetables flipping through the flames, oil sizzling, steam drifting.", "duration": 3}
  ]
}

{
  "model": "kling-3-0",
  "prompt": "@hero slowly turns toward the camera in soft window light",
  "kling_elements": [
    {
      "name": "hero",
      "description": "a young woman with short black hair and a yellow raincoat",
      "element_input_urls": ["https://example.com/hero-front.png", "https://example.com/hero-side.png"]
    }
  ]
}