# Sync Lipsync 3 API

> פּאַסט די ליפּן פֿון יעדן רעדנדיקן ווידעאָ צו אַ נײַעם אַודיאָ־טראַק.

Sync Labs' lipsync-3 בײַט אויס די מויל־באַוועגונג פֿון אַ מענטש אין אַ ווידעא, כּדי זי זאָל שטימען מיט אַ נײַעם קול־טראַק, פֿאַר דאַבינג, אַד־לאָקאַליזאַציע און פֿאַרריכטן שורות אין פּאָסט־פּראָדוקציע. ווען די לענגען פֿון אַודיאָ און ווידעא זענען אַנדערש, קלײַבט אויס צו שנײַדן, לויפֿן אין לופּ, אָפּשפּרינגען, צולייגן שטילקייט אָדער ווידער־מאַפּן.

- Model id: `sync-lipsync/v3`
- Made by: Sync Labs
- Category: Lipsync & Avatars
- Output: video
- Price per minute of your output video: $8.00 / minute of output video (cheapest run $8.00 (8000 API credits))
- Run: `POST https://api.doitong.com/v1/run/sync-lipsync/v3`
- Quote: `POST https://api.doitong.com/v1/quote/sync-lipsync/v3`
- Docs page: https://doitong.com/yi/developers/models/sync-lipsync/v3

## Pricing

Price: **$8.00 / minute of output video**. Price per minute of your output video: 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 $1.334 = 1334 API credits (0.1667 min output video × $8.00).

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/sync-lipsync/v3` 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 |
|---|---|---|---|---|---|---|
| `video_url` | `video` | string (video URL) | yes |  |  | URL וואָס ווײַזט צו דעם אַרײַנגעבונג־ווידעא. |
| `audio_url` | `audio` | string (audio URL) | yes |  |  | אָרט פון אַרײַנגעבונג־אַודיאָ ווי אַ URL. |
| `sync_mode` |  | enum (string) | no | `cut_off` | `cut_off`, `loop`, `bounce`, `silence`, `remap` | ליפּ־סינכראָניזאַציע־מאָדע פֿאַר באַהאַנדלען אונטערשיידן אין אַודיאָ־און ווידעא־לענג. |
| `options` |  | object {sync_mode, model_mode, prompt, temperature, active_speaker_detection, occlusion_detection_enabled} \| null | no |  |  | קאָנפיגורירט דאָ נאָך Sync.so גענערירונג־אָפּפירונג; צוגעשטעלטע options.sync_mode האָט פֿאָרראַנג איבערן אויבערשטן sync_mode ווערט. |
| `options.sync_mode` |  | enum (string) \| null | no |  | `cut_off`, `loop`, `bounce`, `silence`, `remap` | איבערשרײַבונג פֿאַרן אויבערשטן sync_mode, וואָס ספּעציפֿיצירט וואָס געשעט ווען אַרײַנגעבונג־אַודיאָ און ווידעא האָבן פֿאַרשידענע לענגען. |
| `options.model_mode` |  | enum (string) \| null | no |  | `lips`, `face`, `head`, `lipsync`, `emotion`, `talking_head` | אויסקלייב פון עדיטירונג־געגנט, דער עיקר פֿאַר react-1, וואָס ספּעציפֿיצירט וועלכן געגנט דער מאָדעל ענדערט. |
| `options.prompt` |  | enum (string) \| null | no |  | `happy`, `sad`, `angry`, `disgusted`, `surprised`, `neutral` | עמאָציע־אנווײַזונג, דער עיקר געניצט דורך react-1 צו פירן די גענערירונג. |
| `options.temperature` |  | number \| null | no |  | 0 – 1 | אויסדרוקפֿולקייט־באַשטעטיקונג אָן ווירקונג אויף sync-3, וואָס באַהאַנדלט דאָס נאַטירלעך. פֿאַר מאָדעלן וואָס ניצן דעם באַשטעטיקונג גיט 0 די ווייניקסט אויסדרוקפֿולע ליפּ־סינכראָניזאַציע און 1 די מערסטע. |
| `options.active_speaker_detection` |  | object {auto_detect, v3, use_v2, frame_number, coordinates, bounding_boxes, bounding_boxes_url, face_image} \| null | no |  |  | באַשטעטיקונגען פֿאַר אידענטיפֿיצירן דעם אַקטיוון רעדנער אין ווידעאָס מיט עטלעכע מענטשן. |
| `options.active_speaker_detection.auto_detect` |  | boolean \| null | no |  |  | אויטאָמאַטישע אידענטיפֿיצירונג פונעם אַקטיוון רעדנער און אָנווענדונג פון גענערירונג אויף יענעם מענטש. |
| `options.active_speaker_detection.v3` |  | boolean \| null | no |  |  | נוצן v3 אַקטיוו־רעדנער־דערקענונג. |
| `options.active_speaker_detection.use_v2` |  | boolean \| null | no |  |  | אָבזאָלעטער באַשטעטיקונג פֿאַר v2 אַקטיוו־רעדנער־דערקענונג. |
| `options.active_speaker_detection.frame_number` |  | integer \| null | no |  | ≥ 0 | אינדעקס פונעם ראַם געניצט פֿאַר קאָאָרדינאַטן וואָס אויסקלייבן דעם רעדנער מאַנועל. |
| `options.active_speaker_detection.coordinates` |  | array of integer \| null | no |  | 2 – 2 items | פּנים־רעפֿערענץ־פּונקט געגעבן ווי [x, y] פֿאַרן רעדנער אין frame_number. |
| `options.active_speaker_detection.bounding_boxes` |  | array of array of integer \| null | no |  |  | דערקענטע פּנים־גרענעץ־קעסטלעך פֿאַר יעדן ראַם, אויסגעדריקט ווי [x1, y1, x2, y2]. |
| `options.active_speaker_detection.bounding_boxes_url` |  | string \| null | no |  |  | JSON פֿײַל־URL וואָס גיט גרענעץ־קעסטלעך פֿאַר יעדן ראַם. |
| `options.active_speaker_detection.face_image` |  | string \| null | no |  |  | פּנים־בילד קאָדירט אין Base64, געניצט צו אויסקלייבן דעם רעדנער מאַנועל. |
| `options.occlusion_detection_enabled` |  | boolean \| null | no |  |  | אויסשליס־דערקענונג־באַשטימער אָן ווירקונג אויף sync-3 ווײַל די דערקענונג איז דאָרטן אויטאָמאַטיש; אַנדערש באַשטימט ער צי די גענערירונג נעמט אַרײַן אויסשליס־דערקענונג. |

File parameters (`video`, `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
{
  "video": "https://content.doitong.com/video/showcase/v3/avatar/talking_avatar_loop.mp4",
  "audio": "https://content.doitong.com/audio/showcase/v3/tools/dub_es.mp3"
}
```

A fuller example:

```json
{
  "video": "https://content.doitong.com/video/showcase/v3/avatar/talking_avatar_loop.mp4",
  "audio": "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.com/v1/run/sync-lipsync/v3?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "video": "https://content.doitong.com/video/showcase/v3/avatar/talking_avatar_loop.mp4",
    "audio": "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.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/sync-lipsync/v3?wait=20", {
  method: "POST",
  headers,
  body: JSON.stringify({
    "video": "https://content.doitong.com/video/showcase/v3/avatar/talking_avatar_loop.mp4",
    "audio": "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.com/v1"
headers = {"Authorization": "Bearer " + os.environ["DOITONG_API_KEY"]}

payload = {
    "video": "https://content.doitong.com/video/showcase/v3/avatar/talking_avatar_loop.mp4",
    "audio": "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/sync-lipsync/v3", 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": "sync-lipsync/v3",
      "input": {
        "video": "https://content.doitong.com/video/showcase/v3/avatar/talking_avatar_loop.mp4",
        "audio": "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": "sync-lipsync/v3",
  "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": 1334,
    "usd": "1.334",
    "charged": 1334,
    "refunded": 0
  },
  "input": {
    "video": "https://content.doitong.com/video/showcase/v3/avatar/talking_avatar_loop.mp4",
    "audio": "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
    }
  },
  "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.com/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t",
    "cancel": "https://api.doitong.com/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t/cancel"
  }
}
```

### Output fields (`output`)

| Field | Type | Description |
|---|---|---|
| `video` | object {url, content_type, file_name, file_size} | ווידעא געשאַפֿן דורך דעם מאָדעל. |

## Related models

- [Sync React-1](https://doitong.com/developers/models/sync-lipsync/react-1.md) (`sync-lipsync/react-1`): $10.00 / minute of output video
- [sync-3 Avatar Image to Video](https://doitong.com/developers/models/sync-lipsync/v3/image-to-video.md) (`sync-lipsync/v3/image-to-video`): $8.00 / minute of input audio
- [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
- [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
- [Sync Lipsync](https://doitong.com/developers/models/sync-lipsync/v2/pro.md) (`sync-lipsync/v2/pro`): $5.00 / minute of output video
- [Sync Lipsync 2.0](https://doitong.com/developers/models/sync-lipsync/v2.md) (`sync-lipsync/v2`): from $3.00 / minute of output video
- [sync.so -- lipsync 1.9.0-beta](https://doitong.com/developers/models/sync-lipsync.md) (`sync-lipsync`): $0.70 / minute of output video
- [AI Avatar Multi](https://doitong.com/developers/models/ai-avatar/multi.md) (`ai-avatar/multi`): from $0.20 / second of output video

## Links

- HTML page: https://doitong.com/developers/models/sync-lipsync/v3
- 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=sync-lipsync/v3
- Errors: https://doitong.com/developers/docs/errors
- Model details as JSON: https://api.doitong.com/v1/models/sync-lipsync/v3