Seedance API 使用教程：API Key、请求、轮询与参考素材

export SEEDROUTER_API_KEY="your-key"

curl https://api.seedrouter.ai/v1/contents/generations/tasks \
  -H "Authorization: Bearer $SEEDROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "dreamina-seedance-2-0",
    "content": [{"type": "text", "text": "A red paper boat drifts across a calm pond at sunrise, slow dolly-in"}],
    "resolution": "720p",
    "ratio": "16:9",
    "duration": 5,
    "generate_audio": true
  }'

{"id": "task_..."}

import os
import time
import requests

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

response = requests.post(
    f"{API}/contents/generations/tasks",
    headers=headers,
    json={
        "model": "dreamina-seedance-2-0",
        "content": [{"type": "text", "text": "A red paper boat drifts across a calm pond at sunrise, slow dolly-in"}],
        "resolution": "720p",
        "ratio": "16:9",
        "duration": 5,
    },
    timeout=60,
)
response.raise_for_status()
task_id = response.json()["id"]

deadline = time.monotonic() + 1800
while time.monotonic() < deadline:
    result = requests.get(f"{API}/contents/generations/tasks/{task_id}", headers=headers, timeout=30)
    result.raise_for_status()
    task = result.json()
    if task["status"] == "succeeded":
        print(task["content"]["video_url"])
        break
    if task["status"] in ("failed", "expired"):
        raise RuntimeError(task["error"]["message"])
    time.sleep(15)
else:
    raise TimeoutError(f"Still waiting. Resume polling task {task_id}.")

curl https://api.seedrouter.ai/v1/contents/generations/tasks \
  -H "Authorization: Bearer $SEEDROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "dreamina-seedance-2-0",
    "content": [
      {"type": "text", "text": "The character from the image walks through the market in the video, same camera move"},
      {"type": "image_url", "image_url": {"url": "https://example.com/character.png"}, "role": "reference_image"},
      {"type": "video_url", "video_url": {"url": "https://example.com/market.mp4"}, "role": "reference_video"}
    ],
    "ratio": "adaptive",
    "duration": 8
  }'

{
  "model": "dreamina-seedance-2-5",
  "content": [
    {"type": "text", "text": "Change the jacket to red. Keep everything else the same."},
    {"type": "video_url", "video_url": {"url": "https://example.com/clip.mp4"}, "role": "reference_video"}
  ],
  "omni_reference_task_type": "edit"
}

Use the SeedRouter API to generate a Seedance video for me.

Security: read SEEDROUTER_API_KEY from my local environment. Never ask me to paste it and never print it.

Goal: [subject, action, camera move, lighting, what the clip is for]
Model: [dreamina-seedance-2-0 | dreamina-seedance-2-0-fast | dreamina-seedance-2-0-mini | dreamina-seedance-2-5]
Resolution: [480p | 720p | 1080p | 4k]    Ratio: [16:9 | 9:16 | 1:1 | adaptive]    Duration: [seconds]
References: [public image, video or audio URLs with their roles, or none]

Send POST https://api.seedrouter.ai/v1/contents/generations/tasks with
{"model": "...",
 "content": [{"type": "text", "text": "..."}],
 "resolution": "...", "ratio": "...", "duration": 5}
Media goes in content as image_url, video_url or audio_url items with a role,
never base64. Do not add fields that are not in the API reference.

Before sending, show me the request body and wait for my approval: each
task is charged. Then poll GET https://api.seedrouter.ai/v1/contents/generations/tasks/{id}
every 15 seconds until status is succeeded, failed or expired. If polling
times out, keep checking the same task; never resubmit. Save
content.video_url into ./videos/ and tell me the file path.