# Hunyuan Motion [0.46B] API

> Biến thể chuyển văn bản thành chuyển động 0.46B nhỏ hơn cho hoạt ảnh người 3D dưới dạng FBX hoặc JSON

Phiên bản nhỏ gọn của mô hình chuyển động, biến `prompt` văn bản thành chuyển động người 3D. `duration` từ 0.5 đến 12 giây, mặc định 5, `guidance_scale` từ 1 đến 10 và `output_format` là fbx hoặc dict. Trả về tệp FBX, JSON chuyển động và seed.

- Model id: `hunyuan-motion/fast`
- Made by: Tencent
- Category: Text to 3D
- Output: 3d
- Price: $0.06 / request (cheapest run $0.06 (60 API credits))
- Run: `POST https://api.doitong.com/v1/run/hunyuan-motion/fast`
- Quote: `POST https://api.doitong.com/v1/quote/hunyuan-motion/fast`
- Docs page: https://doitong.com/vi/developers/models/hunyuan-motion/fast

## Pricing

Price: **$0.06 / request**. Billed once per request.

The full example input below costs $0.06 = 60 API credits (1 request × 60 API credits).

Prices are the upstream price in USD, paid from the API balance in API credits (1000 API credits = 1 USD). `POST https://api.doitong.com/v1/quote/hunyuan-motion/fast` with the same JSON body returns the exact price for that input; the quote is exactly what a run charges. Invalid input is never charged and failed or canceled requests are refunded automatically.

## Input parameters

| Parameter | Canonical name | Type | Required | Default | Allowed values / range | Description |
|---|---|---|---|---|---|---|
| `prompt` |  | string | yes |  |  | Mô tả văn bản về chuyển động cần tạo sinh. |
| `seed` |  | integer \| null | no |  |  | Seed ngẫu nhiên giúp tái tạo kết quả tạo sinh. |
| `duration` |  | number | no | `5` | 0.5 – 12 | Độ dài chuyển động tính bằng giây, trong khoảng từ 0.5 đến 12.0. |
| `guidance_scale` |  | number | no | `5` | 1 – 10 | Hệ số hướng dẫn không dùng bộ phân loại; giá trị lớn hơn làm tăng mức độ bám sát lời nhắc. |
| `output_format` |  | enum (string) | no | `fbx` | `fbx`, `dict` | Lựa chọn định dạng đầu ra: 'fbx' tạo tệp hoạt ảnh, còn 'dict' tạo JSON thô. |

## Example input

Required parameters only:

```json
{
  "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
}
```

A fuller example:

```json
{
  "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
}
```

## Run it

Set `DOITONG_API_KEY` to a key from https://doitong.com/developers/dashboard#keys. `?wait=20` returns the finished request in the same call when it is ready within 20 seconds; otherwise poll `GET /requests/{id}` (it also accepts `?wait=`), or pass `webhook_url`.

### curl

```bash
# Run the model; wait up to 20 s for the finished result in the same call
curl -X POST "https://api.doitong.com/v1/run/hunyuan-motion/fast?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
  }'

# Still "queued" or "running"? Poll with the id from the response:
curl "https://api.doitong.com/v1/requests/REQUEST_ID?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY"
```

### JavaScript

```javascript
const API = "https://api.doitong.com/v1";
const headers = {
  "Authorization": "Bearer " + process.env.DOITONG_API_KEY,
  "Content-Type": "application/json",
};

// Run the model; wait up to 20 s for the finished result in the same call
let res = await fetch(API + "/run/hunyuan-motion/fast?wait=20", {
  method: "POST",
  headers,
  body: JSON.stringify({
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
  }),
});
let request = await res.json();
if (!res.ok) throw new Error(request.error.code + ": " + request.error.message);

// Not finished yet: long-poll until it is
while (request.status === "queued" || request.status === "running") {
  res = await fetch(API + "/requests/" + request.id + "?wait=20", { headers });
  request = await res.json();
}
if (request.status !== "succeeded") throw new Error(JSON.stringify(request.error));
console.log(request.outputs.map((o) => o.url), request.cost.credits + " API credits ($" + request.cost.usd + ")");
```

### Python

```python
import os
import requests

API = "https://api.doitong.com/v1"
headers = {"Authorization": "Bearer " + os.environ["DOITONG_API_KEY"]}

payload = {
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
}

# Run the model; wait up to 20 s for the finished result in the same call
r = requests.post(API + "/run/hunyuan-motion/fast", params={"wait": 20}, json=payload, headers=headers)
request = r.json()
if not r.ok:
    raise RuntimeError(request["error"]["code"] + ": " + request["error"]["message"])

# Not finished yet: long-poll until it is
while request["status"] in ("queued", "running"):
    request = requests.get(API + "/requests/" + request["id"], params={"wait": 20}, headers=headers).json()
if request["status"] != "succeeded":
    raise RuntimeError(request["error"])
print([o["url"] for o in request["outputs"]], request["cost"]["credits"], "API credits", "$" + request["cost"]["usd"])
```

### MCP

The MCP server at `https://api.doitong.com/v1/mcp` exposes the tools `search_models`, `get_model`, `quote`, `run`, `get_request`, `cancel_request`, `list_requests`, `create_upload` and `get_account`. A `run` call for this model:

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "run",
    "arguments": {
      "model_id": "hunyuan-motion/fast",
      "input": {
        "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
      },
      "wait_seconds": 20
    }
  }
}
```

## Response

Every call returns a request object. `status` is one of `queued`, `running`, `succeeded`, `failed`, `canceled`. `outputs` lists the generated files with URLs on our storage (kept forever, or 7 days with `?storage=temporary`; `storage` says which); `output` is the model's own result object with the same URLs.

```json
{
  "id": "req_8k2m4q7x1z9c3v5b6n0p2r4t",
  "object": "request",
  "model": "hunyuan-motion/fast",
  "status": "succeeded",
  "created_at": "2026-10-20T12:00:00Z",
  "started_at": "2026-10-20T12:00:02Z",
  "completed_at": "2026-10-20T12:00:09Z",
  "queue_position": null,
  "cost": {
    "credits": 60,
    "usd": "0.06",
    "charged": 60,
    "refunded": 0
  },
  "input": {
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
  },
  "output": {
    "fbx_file": {
      "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.jpeg",
      "content_type": "image/jpeg",
      "file_name": "0-output.jpeg",
      "file_size": 1843200
    },
    "motion_json": {
      "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.jpeg",
      "content_type": "image/jpeg",
      "file_name": "0-output.jpeg",
      "file_size": 1843200
    },
    "seed": 42
  },
  "outputs": [
    {
      "type": "file",
      "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.jpeg",
      "content_type": "image/jpeg",
      "file_size": 1843200,
      "stored": true
    }
  ],
  "error": null,
  "metrics": {
    "inference_seconds": 6.8
  },
  "urls": {
    "self": "https://api.doitong.com/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t",
    "cancel": "https://api.doitong.com/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t/cancel"
  }
}
```

### Output fields (`output`)

| Field | Type | Description |
|---|---|---|
| `fbx_file` | object {url, content_type, file_name, file_size} \| null | Tệp FBX chứa hoạt ảnh đã tạo. |
| `motion_json` | object {url, content_type, file_name, file_size} \| null | Dữ liệu chuyển động được tạo ở định dạng JSON. |
| `seed` | integer | Seed được áp dụng trong quá trình tạo sinh. |

## Related models

- [Hunyuan Motion \[1B\]](https://doitong.com/developers/models/hunyuan-motion.md) (`hunyuan-motion`): $0.08 / request
- [Hunyuan 3d](https://doitong.com/developers/models/hunyuan-3d/v3.1/rapid/text-to-3d.md) (`hunyuan-3d/v3.1/rapid/text-to-3d`): from $0.225 / request
- [Hunyuan 3D Pro Text to 3D](https://doitong.com/developers/models/hunyuan-3d/v3.1/pro/text-to-3d.md) (`hunyuan-3d/v3.1/pro/text-to-3d`): $0.375 / run
- [Hunyuan3d V3 · Text to 3D](https://doitong.com/developers/models/hunyuan3d-v3/text-to-3d.md) (`hunyuan3d-v3/text-to-3d`): from $0.225 / run
- [Hyper3D - Rodin V2.5 - Text to 3D](https://doitong.com/developers/models/hyper3d/rodin/v2.5/text-to-3d.md) (`hyper3d/rodin/v2.5/text-to-3d`): from $0.40 / request
- [Hyper3D - Rodin V2.5 - Text to 3D - Fast](https://doitong.com/developers/models/hyper3d/rodin/v2.5/text-to-3d/fast.md) (`hyper3d/rodin/v2.5/text-to-3d/fast`): $0.10 / request
- [Meshy 6 Preview · Text to 3D](https://doitong.com/developers/models/meshy/v6-preview/text-to-3d.md) (`meshy/v6-preview/text-to-3d`): $0.80 / request
- [Meshy 6 · Text to 3D](https://doitong.com/developers/models/meshy/v6/text-to-3d.md) (`meshy/v6/text-to-3d`): $0.80 / request

## Links

- HTML page: https://doitong.com/developers/models/hunyuan-motion/fast
- All models and guides for AI agents: https://doitong.com/developers/llms.txt
- OpenAPI 3.1 with this model's typed request body: https://doitong.com/developers/openapi.json?model=hunyuan-motion/fast
- Errors: https://doitong.com/developers/docs/errors
- Model details as JSON: https://api.doitong.com/v1/models/hunyuan-motion/fast