Python Polling and Download

Create a Seedance 2.0 task, poll for completion, and download the result video with Python.

Seedance 2.0 is asynchronous. Poll the task endpoint until status becomes succeeded, then download content.video_url.

import os
import time
import requests

BASE_URL = "https://api.modelsell.com"
API_KEY = os.environ["MODELSELL_API_KEY"]

response = requests.post(
    f"{BASE_URL}/api/v3/contents/generations/tasks",
    headers={"Authorization": f"Bearer {API_KEY}"},
    json={
        "model": "doubao-seedance-2-0-260128",
        "content": [{"type": "text", "text": "A cinematic city sunrise"}],
        "resolution": "480p",
        "ratio": "16:9",
        "duration": 5,
    },
)
response.raise_for_status()
task_id = response.json()["id"]

while True:
    time.sleep(10)
    result = requests.get(
        f"{BASE_URL}/api/v3/contents/generations/tasks/{task_id}",
        headers={"Authorization": f"Bearer {API_KEY}"},
    )
    result.raise_for_status()
    data = result.json()
    if data["status"] == "succeeded":
        print(data["content"]["video_url"])
        break
    if data["status"] == "failed":
        raise RuntimeError(data.get("error", {}).get("message", "task failed"))