# Scail 2 API

> אַנימירט אַ רעפֿערענץ־בילד פֿון אַ כאַראַקטער מיט באַוועגונג פֿון אַ דרייווינג־ווידעאָ, אָדער טוישט אים אַרײַן אין דער אָריגינעלער סצענע

נעמט אַ רעפֿערענץ־כאַראַקטער `image_url` און אַ דרייווינג־`video_url` מיט אַ מענטש, עטלעכע מענטשן אָדער אַן חיה. אין `animation`־מאָדע פֿירט דער כאַראַקטער אויס די דרייווינג־באַוועגונג; אין `replacement`־מאָדע טוישט ער דעם סוביעקט בשעת די סצענע בלײַבט. די רעזאָלוציע איז 512p אָדער 704p, מיט אָריענטאַציע אויסגעקליבן לויטן בילד. `driving_type` קען ניצן דירעקטע end-to-end דרייווינג אָדער אַן אויסדרוקלעכן פּאָזע־סקעלעט.

- Model id: `scail-2`
- Made by: Open model
- Category: Video to Video
- Output: video
- Price per second of your input video: $0.20 / second of input video (cheapest run $0.20 (200 API credits))
- Run: `POST https://api.doitong.com/v1/run/scail-2`
- Quote: `POST https://api.doitong.com/v1/quote/scail-2`
- Docs page: https://doitong.com/yi/developers/models/scail-2

## Pricing

Price: **$0.20 / second of input video**. Price per second of your input 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 $2.00 = 2000 API credits (10 s input video × $0.20).

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/scail-2` 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 |
|---|---|---|---|---|---|---|
| `prompt` |  | string | yes |  |  | פּראָמפּט וואָס באַשטימט דעם געוואָלטן רעזולטאַט־ווידעא. |
| `image_url` | `image` | string (image URL) | yes |  |  | URL פֿון אַ רעפֿערענץ־בילד מיטן כאַראַקטער צו אַנימירן אָדער אײַנשטעלן אַנשטאָט אַ סוביעקט; דער באַוועגונגס־ווידעא באַשטימט די אַנימאַציע אָדער אויסבײַטונג. |
| `video_url` | `video` | string (video URL) | yes |  |  | גיט אָן אַ באַוועגונגס־ווידעא דורך אַ URL, מיט איין מענטש, עטלעכע מענטשן אָדער אַ חיה. |
| `mode` |  | enum (string) | no | `animation` | `animation`, `replacement` | קלײַבט ווי צו ניצן דעם רעפֿערענץ־כאַראַקטער: `replacement` היט אָפּ די אָריגינעלע סצענע, אָבער שטעלט אײַן דעם כאַראַקטער אַנשטאָט דעם סוביעקט אין באַוועגונגס־ווידעא; `animation` גיט איבער די באַוועגונג צום כאַראַקטער. |
| `driving_type` |  | enum (string) | no | `end_to_end` | `end_to_end`, `pose` | די אַנימאַציע־באַוועגונג קומט גלײַך פֿון אַ באַוועגונגס־ווידעא מיט אַ SAM3־מאַסקע בײַ `end_to_end`, די סטאַנדאַרט־ברירה, רעקאָמענדירט פֿאַר מאַקסימאַלער פֿאַרלאָזלעכקייט. אַלטערנאַטיוו ניצט `pose` NLF/DWPose צו רענדערן אַן עקספּליציטן סקעלעט פֿון יענעם ווידעא, מיט מער קאָנטראָל בײַ שווערע אַרײַנגעבונגען. |
| `subject_type` |  | enum (string) | no | `human` | `human`, `animal` | אויסקלײַב פֿונעם סוביעקט אין באַוועגונגס־ווידעא; `animal` שטעלט אײַן דעם דערקענונגס־פּראָמפּט פֿון SAM3 פֿאַר סוביעקטן וואָס זענען נישט `human`. |
| `resolution` |  | enum (string) | no | `512p` | `512p`, `704p` | רעזולטאַט־רעזאָלוציע, מיט אַן אָריענטאַציע וואָס ווערט אויטאָמאַטיש באַשטימט לויטן זײַטן־פֿאַרהעלטעניש פֿונעם רעפֿערענץ־בילד. בײַ אַ ברייטן פֿאָרמאַט ווערט 512p צו 896x512 און 704p צו 1280x704; בײַ אַ הויכן פֿאָרמאַט ווערן געניצט 512x896 און 704x1280, רעספּעקטיוו. |
| `num_inference_steps` |  | integer | no | `40` | 2 – 50 | צאָל שריט בײַ דיפֿוזיע־מוסטערונג. אַ העכערע צאָל פֿאַרבעסערט די קוואַליטעט, אָבער נעמט מער צײַט. |
| `guidance_scale` |  | number | no | `5` | 1 – 10 | Classifier-free guidance שטאַרקייט, וואָס באַלאַנסירט נאָכפֿאָלגן דעם פּראָמפּט קעגן קרעאַטיווקייט. |
| `shift` |  | number | no | `3` | 1 – 10 | ראַש־פּלאַן־פֿאַרשיבונג פֿאַר שטראָם־צופּאַסונג; בײַ 512p איז די רעקאָמענדירטע באַשטעטיקונג 3.0. |
| `seed` |  | integer \| null | no |  |  | גענערירונגס־זוימען אין דער ענטפֿער, צי ער איז בפֿירוש אָנגעגעבן געוואָרן צי צופֿעליק אויסגעקליבן ווײַל די אַרײַנגעבונג איז געבליבן ליידיק. |
| `enable_safety_checker` |  | boolean | no | `true` |  | סקרינינג קען ווערן פאַרלייכטערט דורך שטעלן false, אויב דער רופער איז אָטעריזירט. |

File parameters (`image`, `video`) 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
{
  "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
  "image": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg",
  "video": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4"
}
```

A fuller example:

```json
{
  "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
  "image_url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg",
  "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4"
}
```

## 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/scail-2?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",
    "image_url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg",
    "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4"
  }'

# 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/scail-2?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",
    "image_url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg",
    "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4"
  }),
});
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",
    "image_url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg",
    "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4",
}

# Run the model; wait up to 20 s for the finished result in the same call
r = requests.post(API + "/run/scail-2", 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": "scail-2",
      "input": {
        "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
        "image_url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg",
        "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4"
      },
      "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": "scail-2",
  "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": 2000,
    "usd": "2.00",
    "charged": 2000,
    "refunded": 0
  },
  "input": {
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
    "image_url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg",
    "video_url": "https://content.doitong.com/video/showcase/v3/gen_fox_cartoon.mp4"
  },
  "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
    },
    "seed": 42,
    "preprocessing_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
    },
    "preprocessing_mask_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־פֿײַל געשאַפֿן דורך גענערירונג. |
| `seed` | integer | זוימען פֿאַר ווידעא־גענערירונג. |
| `preprocessing_video` | object {url, content_type, file_name, file_size} \| null | דיבאַג־ווידעא מיט דער Stage-A פּאָזע־באַדינגונגס־אַרײַנגעבונג צום דיפֿוזיע־מאָדעל, פֿאַראַן נאָר מיט `output_preprocessing=true`. דער אינהאַלט ווענדט זיך אין `driving_type`: `end_to_end` ניצט באַוועגונגס־ווידעא מיט אַ SAM3־מאַסקע, בעת `driving_type=pose` ניצט אַ סקעלעט גערענדערט דורך NLF/DWPose. |
| `preprocessing_mask_video` | object {url, content_type, file_name, file_size} \| null | Stage-A באַוועגונגס־מאַסקע־ווידעא פֿאַר דיבאַגינג, פֿאַראַן נאָר מיט `output_preprocessing=true`. |

## Related models

- [AMT Interpolation](https://doitong.com/developers/models/amt-interpolation.md) (`amt-interpolation`): $0.000575 / second of processing time
- [AnimateDiff Turbo · Video to Video](https://doitong.com/developers/models/fast-animatediff/turbo/video-to-video.md) (`fast-animatediff/turbo/video-to-video`): $0.00125 / second of processing time
- [AnimateDiff · Video to Video](https://doitong.com/developers/models/fast-animatediff/video-to-video.md) (`fast-animatediff/video-to-video`): $0.00125 / second of processing time
- [Bernini-R Edit Video](https://doitong.com/developers/models/bernini-r/edit-video.md) (`bernini-r/edit-video`): from $0.04 / second of output video
- [Bernini-R Reference Edit Video](https://doitong.com/developers/models/bernini-r/reference-edit-video.md) (`bernini-r/reference-edit-video`): from $0.04 / second of output video
- [DWPose Pose Prediction · Video](https://doitong.com/developers/models/dwpose/video.md) (`dwpose/video`): $0.0006 / second of processing time
- [Editto](https://doitong.com/developers/models/editto.md) (`editto`): from $0.04 / second of output video
- [ID-V2V](https://doitong.com/developers/models/id-v2v.md) (`id-v2v`): $0.20 / second of output video

## Links

- HTML page: https://doitong.com/developers/models/scail-2
- 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=scail-2
- Errors: https://doitong.com/developers/docs/errors
- Model details as JSON: https://api.doitong.com/v1/models/scail-2