入门指南

快速入门

创建 API 密钥、充值，并在两分钟内使用 JavaScript、Python 或 cURL 生成第一个 AI 视频。

本指南将带你从零开始，使用 Seedance 2.0 Fast 生成视频。所有模型的步骤都相同，只需更换端点和输入字段。

正在使用编程智能体？

将这段内容粘贴到 Claude Code、Cursor、Codex 或任意编程智能体中。它会将 API 接入你的项目，把密钥保存在 CHEAPERGEN_API_KEY 中，并在开始任何付费操作前先用免费报价进行测试。

Add Seedance 2.0 Fast (CheaperGen endpoint bytedance/seedance-2.0-fast/text-to-video) to this project by following https://cheapergen.com/agents/integrate.md

智能体读取的内容

创建账户和 API 密钥
登录：Google 账号或电子邮箱均可。然后打开 控制面板 → API 密钥 创建密钥。密钥以 cg_live_… 开头，只显示一次，请复制并妥善保存。
充值
CheaperGen 采用预付费模式。前往 控制面板 → 账单。下方示例的费用为 $0.45 — $0.605 位于 the official price。生成失败会自动退款。参见计费与余额.
设置 API 密钥
请勿将密钥写入代码。本文档中的所有示例都会从环境变量中读取密钥：
```
export CHEAPERGEN_API_KEY="cg_live_..."
```

提交生成任务

将模型输入发送到 POST /api/v1/run/bytedance/seedance-2.0-fast/text-to-video。下方脚本会提交任务、持续轮询直到完成，并打印视频 URL。

const API = "https://cheapergen.com/api/v1";
const headers = {
  Authorization: `Bearer ${process.env.CHEAPERGEN_API_KEY}`,
  "Content-Type": "application/json",
};

// 1. Submit the job
let job = await fetch(`${API}/run/bytedance/seedance-2.0-fast/text-to-video`, {
  method: "POST",
  headers,
  body: JSON.stringify({
    "prompt": "黄金时刻，陶艺家缓缓将陶土塑成花瓶，光线中尘埃浮动，浅景深，镜头缓慢推进",
    "aspect_ratio": "16:9",
    "resolution": "720p",
    "duration": 5
  }),
}).then((r) => r.json());

// 2. Poll until it finishes (or pass webhook_url and skip polling)
while (job.status === "queued" || job.status === "running") {
  await new Promise((r) => setTimeout(r, 3000));
  job = await fetch(`${API}/generations/${job.id}`, { headers }).then((r) => r.json());
}

console.log(job.status === "succeeded" ? job.output.video.url : job.error);

import os, time, requests

API = "https://cheapergen.com/api/v1"
headers = {"Authorization": f"Bearer {os.environ['CHEAPERGEN_API_KEY']}"}

# 1. Submit the job
job = requests.post(f"{API}/run/bytedance/seedance-2.0-fast/text-to-video", headers=headers, json={
    "prompt": "黄金时刻，陶艺家缓缓将陶土塑成花瓶，光线中尘埃浮动，浅景深，镜头缓慢推进",
    "aspect_ratio": "16:9",
    "resolution": "720p",
    "duration": 5
}).json()

# 2. Poll until it finishes (or pass "webhook_url" and skip polling)
while job["status"] in ("queued", "running"):
    time.sleep(3)
    job = requests.get(f"{API}/generations/{job['id']}", headers=headers).json()

print(job["status"], job["output"]["video"]["url"] if job["status"] == "succeeded" else job["error"])

curl -X POST https://cheapergen.com/api/v1/run/bytedance/seedance-2.0-fast/text-to-video \
  -H "Authorization: Bearer $CHEAPERGEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "prompt": "黄金时刻，陶艺家缓缓将陶土塑成花瓶，光线中尘埃浮动，浅景深，镜头缓慢推进",
  "aspect_ratio": "16:9",
  "resolution": "720p",
  "duration": 5
}'

API 会立即返回 202 Accepted，并将生成任务设为 queued 状态。任务运行期间，cost.amount_usd 中显示的冻结金额会从余额中保留。

202 Accepted

{
  "id": "gen_8c2QmX1nq0k4Lw7Z",
  "object": "generation",
  "model": "bytedance/seedance-2.0-fast",
  "endpoint": "bytedance/seedance-2.0-fast/text-to-video",
  "mode": "text-to-video",
  "status": "queued",
  "input": {
    "prompt": "黄金时刻，陶艺家缓缓将陶土塑成花瓶，光线中尘埃浮动，浅景深，镜头缓慢推进",
    "aspect_ratio": "16:9",
    "resolution": "720p",
    "duration": 5,
    "generate_audio": true
  },
  "output": null,
  "error": null,
  "cost": {
    "amount_usd": 0.4494,
    "currency": "usd",
    "estimated": true
  },
  "source": "api",
  "created_at": "2026-10-15T09:21:04.512Z",
  "started_at": null,
  "completed_at": null,
  "retention": "1d",
  "expires_at": null,
  "purged_at": null,
  "urls": {
    "get": "https://cheapergen.com/api/v1/generations/gen_8c2QmX1nq0k4Lw7Z",
    "cancel": "https://cheapergen.com/api/v1/generations/gen_8c2QmX1nq0k4Lw7Z/cancel"
  }
}

获取结果

持续轮询生成任务，直到 status 的状态变为 succeeded 或 failed。视频任务通常需要几分钟；图像只需几秒。

curl https://cheapergen.com/api/v1/generations/gen_8c2QmX1nq0k4Lw7Z \
  -H "Authorization: Bearer $CHEAPERGEN_API_KEY"

200 OK

{
  "id": "gen_8c2QmX1nq0k4Lw7Z",
  "object": "generation",
  "model": "bytedance/seedance-2.0-fast",
  "endpoint": "bytedance/seedance-2.0-fast/text-to-video",
  "mode": "text-to-video",
  "status": "succeeded",
  "input": {
    "prompt": "黄金时刻，陶艺家缓缓将陶土塑成花瓶，光线中尘埃浮动，浅景深，镜头缓慢推进",
    "aspect_ratio": "16:9",
    "resolution": "720p",
    "duration": 5,
    "generate_audio": true
  },
  "output": {
    "video": {
      "url": "https://cdn.cheapergen.com/outputs/gen_8c2QmX1nq0k4Lw7Z.mp4",
      "content_type": "video/mp4"
    }
  },
  "error": null,
  "cost": {
    "amount_usd": 0.4494,
    "currency": "usd",
    "estimated": false
  },
  "source": "api",
  "created_at": "2026-10-15T09:21:04.512Z",
  "started_at": "2026-10-15T09:21:09.031Z",
  "completed_at": "2026-10-15T09:22:31.870Z",
  "retention": "1d",
  "expires_at": "2026-10-16T09:22:31.870Z",
  "purged_at": null
}

使用 Webhook 跳过轮询

在请求正文中添加 "webhook_url": "https://your-app.com/hooks/cheapergen"，任务完成后我们会通过 POST 将结果发送给你。参见 Webhooks。

后续步骤#

了解生成任务的生命周期——状态、轮询间隔、取消和输出。
选择模型——所有端点 ID 及每秒或每张图像的价格。
处理错误——了解哪些响应可以重试，哪些需要修正。
Seedance 2.0 Fast API 参考文档——所有输入字段、类型和默认值。

有不清楚或缺少的内容？发邮件至 support@cheapergen.com——我们会认真阅读每一封邮件。

快速入门

创建账户和 API 密钥

充值

设置 API 密钥

提交生成任务

获取结果

后续步骤#