# Heygen v5 Digital Twin API

> 4k ᠪᡠᠶᡝᠮᡝ᠈ ᠪᠣᠯᡤᠣ WebM᠈ ᠮᡠᠩᡤᠠᠨ᠈ watermark ᠪᠣᠯᠣᠨ SRT caption ᠪᡝ ᠪᠠᡥᠠᡵᠠ ᠠᡵᠠᡵᠠᠩᡤᡝ V ᡳ ᡩᡳᠵᡳᡨᠠᠯ ᠵᡠᡵᡠ

ᡥᡡᠯᠠᠨ (`prompt` ᡳ ᡶᡳᠰᡝᠨ `voice`) ᠵᡝᠯᡳᠨ ᡥᡡᠯᡝᠮᠪᡳ ᠠᠸᠠᡨᠠᡵ ᠰᡠᠨᡤᠠ ᠪᡠᠶᡝᠮᡝᠮᡝ ᡝᡵᡝᠮᠪᡳ ᠠᠮᡝ `audio_url` ᡩᡝ ᡤᡳᠰᡠᠨ ᡩᡝᠨᡩᡝᡵᡝ ᠵᡝᡵᡤᡳ ᠵᠠᠯᠠᠨ ᡩᡝ ᡝᡵᡝᠮᠪᡳ. ᡳᠰᡳᠯᠠᠮᠪᡳ ᠵᡝᠯᡳᠨ `avatar`᠂ `fit` ᡩᡝ ᡠᠮᡝᠰᡳ ᠠᠮᠠᠯᠠ ᠵᡝᠪᡝ ᡝᠮᡠ 720p᠂ 1080p ᠠᠮᠠᠯᠠ 4k ᠵᠠᠯᠠᠨ. `output_format` ᠮᡳ ᡝᠮᡠ mp4 ᠠᠮᠠᠯᠠ webm ᠣᠮᠪᡳ; webm ᠮᡳ ᡶᡝᠯᡳ ᠰᡳᠩᡤᡳ ᠪᡳ. ᡝᠨᡩᡝᠮᡠ ᠪᡠᠶᡝᠮᡝ ᡩᡝ ᠵᡠᠯᡤᡝᠨ ᡤᡝᠮᡠᠨ᠂ ᠵᡠᠯᡤᡝᠨ ᡩᡝ ᠰᡳᠩᡤᡳ ᠵᡝᠯᡤᡳ ᠠᠮᠠᠯᠠ ᠵᡝᠯᡳᠨ SRT ᡶᡳᠯᡝ ᠪᡳ.

- Model id: `heygen/avatar5/digital-twin`
- Made by: HeyGen
- Category: Lipsync & Avatars
- Output: video
- Price per second of your input audio: $0.10 / second of input audio (cheapest run $0.10 (100 API credits))
- Run: `POST https://api.doitong.ru/v1/run/heygen/avatar5/digital-twin`
- Quote: `POST https://api.doitong.ru/v1/quote/heygen/avatar5/digital-twin`
- Docs page: https://doitong.com/mnc/developers/models/heygen/avatar5/digital-twin

## Pricing

Price: **$0.10 / second of input audio**. Price per second of your input audio: the input files are measured before the run (length, resolution, frame rate). The quote measures the same files and is exactly what the run charges.

The full example input below costs $1.00 = 1000 API credits (10 s input audio × $0.10).

Prices are the upstream price in USD, paid from the API balance in API credits (1000 API credits = 1 USD). `POST https://api.doitong.ru/v1/quote/heygen/avatar5/digital-twin` 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

Send either the canonical name or the native field name (not both). Canonical names are the same across models.

| Parameter | Canonical name | Type | Required | Default | Allowed values / range | Description |
|---|---|---|---|---|---|---|
| `avatar` |  | string \| null | no | `Abigail Sofa Front` |  | Avatar V ᡩᡝ ᠠᠰᡳᠮᡝ ᠠᠪᡴᠠᡳ ᠵᠠᠯᠠᠨᡳ ᠮᡠᠰᡝ. |
| `prompt` |  | string \| null | no |  |  | ᠠᠪᡴᠠᡳ ᡥᡡᠯᠠᠨ; `audio_url` ᠠᡴᡳ ᠪᡝ ᠪᡝᠯᡝᠨ ᠠᠮᠠᠯᠠᠮᡝ. |
| `voice` |  | enum (string) \| null | no | `Warm Pro Narrator` | `Warm Pro Narrator`, `Chill Brian`, `Ivy`, `John Doe`, `Monika Sogam`, `Hope `, `Archer `, `Brittney`, `Patrick`, `David Castlemore`, `Michael C`, `Adam Stone `, `Juniper`, `Cassidy `, `Jessica Anne Bogart`, `Arabella`, `Andrew`, `Spuds Oxley `, `Grace Elder`, `Helen`, `Canyon Rivers`, `Derya - Lifelike - Excited 🤩`, `Mellow Marcus`, `Jack Sterling - Broadcaster 🎙️`, `Brenda - UGC - 1.mp4`, `Reid`, `Reagan`, `Terry`, `Jenny`, `Radio Rick`, `Denise`, `Tim in car - Excited 🤩`, `Iskander`, `Thompson`, `Delicate Daisy - Excited 🤩`, `Kingston`, `George UGC 1`, `Bold Blake`, `Jane`, `Expressive Evan`, `Marianne - IA`, `Aaron`, `Modern Recipe Host - Voice 1`, `Willow`, `Cute Chloe - Friendly 😊`, `Rafael`, `June - Lifelike`, `Crisp Chloe`, `Slick Simon`, `Nassim - Informative`, `Baritone Ben`, `Maxwell`, `Ellie Faye - Excited 🤩`, `Milani`, `Feisty Fiona - Excited 🤩`, `Professor Dean`, `Rose - UGC - 1.mp4`, `Shona`, `Hudson Wilder`, `Ann - IA`, `Alastair Kensington`, `Oxley`, `Christina`, `Andrew Rizz `, `Peyton`, `Gerardo - Outdoor`, `Chloe - Lifelike`, `Stephanie`, `Anthony - IA`, `Signal - Voice 1`, `Luca`, `Lisa - Voice 1`, `T.W.Tucker`, `Jack Sullivan - Serious 😐`, `Winter`, `Mireia - Lifelike`, `Georgia`, `Stella`, `Masha - Lifelike`, `Charming Charles - Friendly 😊`, `Serenity`, `Annie - Excited`, `Ralph`, `Bethany`, `Dominic`, `Mason Finn`, `Leena`, `Veteran Victor`, `Tamara`, `Nik Public`, `Calm Chloe`, `Sevik`, `Reilly`, `Raul`, `Imposing Ian`, `Relaxed Ray`, `Dexter - Professional`, `Relaxed Rick`, `Edwin`, `Rupert Blackwood`, `Ginny`, `Hope` | ᠠᠪᡴᠠᡳ ᡤᡳᠰᡠᠨᡳ ᠮᡠᠰᡝ ᡥᡡᠯᠠᠨᡳ ᠠᠰᡳᠮᡝ; `audio_url` ᠠᡴᡳ ᠵᠠᠯᠠᠨ. |
| `audio_url` | `audio` | string (audio URL) \| null | no |  |  | HTTP(S) ᡤᡳᠰᡠᠨᡳ ᡶᡳᠯᡝ URL ᠠᠰᡳᠮᡝ, ᠠᠰᡳᠮᡝ ᠪᡝ ᡥᡡᠯᠠᠨ ᠪᡝ ᠰᠣᠯᡥᠣᠮᡝ. ᠵᡝᠯᡤᡳᠶᡝᠨ `prompt` ᠠᡳ `voice` ᠠᠰᡳᠮᡝ ᠠᡴᡡ. |
| `fit` |  | enum (string) | no | `cover` | `contain`, `cover` | ᠠᠪᡴᠠᡳ ᠵᠠᠯᠠᠨᡳ ᠵᠠᠯᠠᠨ ᠪᡝ ᠠᠰᡳᠮᡝ: 'cover' ᠪᡝ ᠪᡠᠶᡝᠮᡝᠨᡳ ᡶᡳᠯᡝᠮᡝ ᠪᡝ ᠵᠠᠯᠠᠮᡝ ᠠᠪᡴᠠᡳ ᠪᡝ ᠰᡳᠯᡤᡳᠮᡝ ᠠᠴᠠᠨᡩᡝ, 'contain' ᠪᡝ ᠠᠪᡴᠠᡳ ᠪᡝ ᡩᠠᠯᠵᡳᠨ ᠠᠰᡳᠮᡝ ᠵᠠᠯᠠᠨ ᠪᡝ ᠨᡝᠮᡝ ᠠᠮᠠᠯᠠᠮᡝ. |
| `remove_background` |  | boolean | no | `false` |  | ᠠᠪᡴᠠᡳ ᠵᡠᠯᡤᡝ ᠪᡝ ᠠᠰᡳᠮᡝ ᠠᡴᡡ; matting ᠪᡝ ᠠᠰᡳᠮᡝ ᠠᠪᡴᠠᡳ ᠵᠠᠯᠠᠨ. |
| `background` |  | object {type, value} \| null | no |  |  | ᠠᠪᡴᠠᡳ ᠠᠴᠠᠨᡩᡝ ᠵᡠᠯᡤᡝ ᠪᡝ ᠠᠰᡳᠮᡝ, `output_format='webm'` ᠠᡴᡳ; ᠴᠠᡤᠠᠨ webm ᠪᡠᠶᡝᠮᡝ ᡝᠯᡝᠩ ᡝᠵᡝᠨ ᡝᠵᡝᠨᡳ ᠵᡠᠯᡤᡝ ᠪᡝ ᠠᠰᡳᠮᡝ ᠠᡴᡡ. |
| `background.type` |  | enum (string) | no | `color` | `color`, `image` | ᠵᡠᠯᡤᡝᠨᡳ ᡝᠮᡤᡳᠯᡝᠨ: `color` ᠪᡝ ᠴᠠᡤᠠᠨ ᠠᠰᡳᠮᡝ, `image` ᠪᡝ ᡤᠠᠳᠠᠨᡳ URL ᠠᠰᡳᠮᡝ. |
| `background.value` |  | string | no | `#FFFFFF` |  | ᠵᡠᠯᡤᡝᠨᡳ ᠠᠮᠠᠯᠠᠨ: ᠡᠮᡤᡳᠯᡝᠨ `color` ᠪᡝ ᠴᠠᡤᠠᠨ ᠠᠰᡳᠮᡝ, `image` ᠪᡝ HTTP(S) URL ᠠᠰᡳᠮᡝ. |
| `watermark` |  | object {image_url, scale, opacity, placement} \| null | no |  |  | ᠪᡠᠶᡝᠮᡝᠨᡳ ᠰᡠᠨᡤᠠᡩᡝ ᠪᡝᠶᡝ ᠪᡝ ᠵᠠᠯᠠᠮᡝ ᠠᠰᡳᠮᡝ ᡝᠮᡤᡳᠯᡝ ᡤᠠᠳᠠᠨ. |
| `watermark.image_url` |  | string (image URL) | yes |  |  | ᠰᡠᠨᡤᠠᡩᡝ ᠵᠠᠯᠠᠮᡝ ᠠᠰᡳᠮᡝ ᠪᡝᠶᡝ ᡤᠠᠳᠠᠨᡳ HTTP(S) URL. |
| `watermark.scale` |  | number \| null | no |  | ≤ 2, > 0 | ᠰᡠᠨᡤᠠᡳ ᠵᠠᠯᠠᠨᡩᡝ ᠪᡝᠶᡝ ᡤᠠᠳᠠᠨᡳ ᠵᠠᠯᠠᠨ, 0.0 ᡩᡝ ᠠᠴᠠᠨᡩᡝ 2.0 ᡩᡝ ᠵᠠᡴᡳ. |
| `watermark.opacity` |  | number \| null | no |  | 0 – 1 | ᠪᡝᠶᡝ ᡤᠠᠳᠠᠨᡳ ᠠᠯᡥᠠᠨᡳ ᠵᠠᠯᠠᠨ: 0.0 ᠪᡝ ᠵᠠᠯᠠᠨ, 1.0 ᠪᡝ ᠠᠯᡥᠠᠨ. |
| `watermark.placement` |  | enum (string) \| null | no |  | `top-left`, `top-right`, `bottom-left`, `bottom-right` | ᠰᡠᠨᡤᠠᡳ ᠵᠠᠯᠠᠨᡩᡝ ᠪᡝᠶᡝ ᡤᠠᠳᠠᠨᡳ ᠵᠠᠯᠠᠨ. |
| `caption` |  | boolean | no | `false` |  | ᠰᡠᠨᡤᠠᡳ ᠠᠯᠪᠠᠨ ᡝᠮᡤᡳᠯᡝᠨ SRT ᡤᠠᠳᠠᠨᡳ ᡶᡳᠯᡝ ᠪᡝ ᠪᡠᠶᡝᠮᡝᠮᠪᡳ. |
| `output_format` |  | enum (string) | no | `mp4` | `mp4`, `webm` | ᠰᡠᠨᡤᠠᡳ ᡶᡳᠯᡝᠮᡝᠨᡳ ᠠᠰᡳᠮᡝ, `webm` ᠪᡝ ᠵᡠᠯᡤᡝᠨᡳ ᠵᠠᠯᠠᠨ ᠪᡝ ᠠᠰᡳᠮᡝ ᠴᠠᡤᠠᠨ ᠪᡝ ᠠᠰᡳᠮᡝ; ᠵᠠᠯᠠᠨᡩᡝ `background` ᠠᡴᡡ. |
| `resolution` |  | enum (string) | no | `720p` | `720p`, `1080p`, `4k` | ᠪᡠᠶᡝᠮᡝᠮᠪᡝ ᠵᠠᠯᠠᠨᡳ ᠵᠠᠯᠠᠨ ᠠᠰᡳᠮᡝ. |
| `aspect_ratio` |  | enum (string) | no | `16:9` | `16:9`, `9:16`, `4:5`, `5:4`, `1:1`, `auto` | ᠰᡠᠨᡤᠠᡳ ᠵᠠᠯᠠᠨᡳ ᠵᠠᠯᠠᠨ ᠪᡝ ᠠᠰᡳᠮᡝ: 'auto' HeyGen ᠪᡝ ᠵᠠᠯᠠᠨᡳ ᠵᠠᠯᠠᠨ ᠪᡝ ᠠᠰᡳᠮᡝ ᠪᡝ ᠠᠮᠠᠯᠠᠮᡝ ᠠᠰᡳᠮᡝ, ᠠᡴᡳ ᠪᡝ '16:9' ᠠᠰᡳᠮᡝ. ᠵᠠᠯᠠᠨᡳ ᠠᠰᡳᠮᡝᠮᠪᡳ: '16:9', '9:16', '4:5', '5:4', ᠠᡴᡳ '1:1'. |
| `enable_safety_checker` |  | boolean | no | `true` |  | ᠠᠰᡠᡵᠠᠮᡝ ᠠᠨᡩᠠ ᠪᡳᠮᡝ ᠰᠠᡳᠨ᠈ ᠵᡠᠴᡝᠨ ᠵᡠᠰᡝ ᠠᠰᡠᡵᠠᠮᡝ᠉ |

File parameters (`audio`) take a public `https://` URL, a `data:` URI up to 10 MB, or the `file_url` of an upload from `POST /files`.

## Example input

Required parameters only:

```json
{}
```

A fuller example:

```json
{
  "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
  "audio_url": "https://content.doitong.com/audio/showcase/v3/tools/dub_es.mp3"
}
```

## 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.ru/v1/run/heygen/avatar5/digital-twin?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",
    "audio_url": "https://content.doitong.com/audio/showcase/v3/tools/dub_es.mp3"
  }'

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

### JavaScript

```javascript
const API = "https://api.doitong.ru/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/heygen/avatar5/digital-twin?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",
    "audio_url": "https://content.doitong.com/audio/showcase/v3/tools/dub_es.mp3"
  }),
});
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.ru/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",
    "audio_url": "https://content.doitong.com/audio/showcase/v3/tools/dub_es.mp3",
}

# Run the model; wait up to 20 s for the finished result in the same call
r = requests.post(API + "/run/heygen/avatar5/digital-twin", 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.ru/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": "heygen/avatar5/digital-twin",
      "input": {
        "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
        "audio_url": "https://content.doitong.com/audio/showcase/v3/tools/dub_es.mp3"
      },
      "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": "heygen/avatar5/digital-twin",
  "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": 1000,
    "usd": "1.00",
    "charged": 1000,
    "refunded": 0
  },
  "input": {
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
    "audio_url": "https://content.doitong.com/audio/showcase/v3/tools/dub_es.mp3"
  },
  "output": {
    "video": {
      "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.mp4",
      "content_type": "video/mp4",
      "file_name": "0-output.mp4",
      "file_size": 1843200
    },
    "caption_file": {
      "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.mp4",
      "content_type": "video/mp4",
      "file_name": "0-output.mp4",
      "file_size": 1843200
    }
  },
  "outputs": [
    {
      "type": "video",
      "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.mp4",
      "content_type": "video/mp4",
      "file_size": 1843200,
      "width": 1280,
      "height": 720,
      "duration": 5,
      "stored": true
    }
  ],
  "error": null,
  "metrics": {
    "inference_seconds": 6.8
  },
  "urls": {
    "self": "https://api.doitong.ru/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t",
    "cancel": "https://api.doitong.ru/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t/cancel"
  }
}
```

### Output fields (`output`)

| Field | Type | Description |
|---|---|---|
| `video` | object {url, content_type, file_name, file_size} | Avatar V ᠪᡠᠶᡝᠮᡝᠮᠪᡳ ᠰᡠᠨᡤᠠᡳ ᡶᡳᠯᡝ. |
| `caption_file` | object {url, content_type, file_name, file_size} \| null | `caption=True` ᠠᠰᡳᠮᡝ ᠪᡠᠶᡝᠮᡝᠮᠪᡳ SRT ᡤᠠᠳᠠᠨᡳ ᡶᡳᠯᡝ, ᠪᡝ ᠠᠰᡳᠮᡝ ᠰᡝᡵᡝ. |

## Related models

- [Kling AI Avatar 2.0 Pro](https://doitong.com/developers/models/kling-video/ai-avatar/v2/pro.md) (`kling-video/ai-avatar/v2/pro`): $0.115 / second of input audio
- [Sync Lipsync 3](https://doitong.com/developers/models/sync-lipsync/v3.md) (`sync-lipsync/v3`): $8.00 / minute of output video
- [VEED Fabric 1.0](https://doitong.com/developers/models/veed/fabric-1.0.md) (`veed/fabric-1.0`): from $0.08 / second of input audio
- [Heygen Lipsync - Precision](https://doitong.com/developers/models/heygen/v3/lipsync/precision.md) (`heygen/v3/lipsync/precision`): $0.10 / second of output video
- [Heygen Lipsync - Speed](https://doitong.com/developers/models/heygen/v3/lipsync/speed.md) (`heygen/v3/lipsync/speed`): $0.05 / second of output video
- [Heygen · Avatar3 · Digital Twin](https://doitong.com/developers/models/heygen/avatar3/digital-twin.md) (`heygen/avatar3/digital-twin`): $0.034 / second of input audio
- [Heygen · Avatar4 · Digital Twin](https://doitong.com/developers/models/heygen/avatar4/digital-twin.md) (`heygen/avatar4/digital-twin`): $0.10 / second of input audio
- [Heygen · Avatar4 · Image to Video](https://doitong.com/developers/models/heygen/avatar4/image-to-video.md) (`heygen/avatar4/image-to-video`): $0.10 / second of input audio

## Links

- HTML page: https://doitong.com/developers/models/heygen/avatar5/digital-twin
- 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=heygen/avatar5/digital-twin
- Errors: https://doitong.com/developers/docs/errors
- Model details as JSON: https://api.doitong.ru/v1/models/heygen/avatar5/digital-twin