# Scail 2 API

> Beòthaich ìomhaigh caractair iomraidh le gluasad bho bhidio stiùiridh, no cuir an caractar san t-sealladh thùsail na àite

Gabhaidh e `image_url` caractair iomraidh agus `video_url` stiùiridh a sheallas duine, grunn dhaoine no beathach. Ann am modh `animation` nì an caractar gluasad a’ bhidio stiùiridh; ann am modh `replacement` cuiridh e an caractar an àite a’ chuspair fhad ’s a chumas e an sealladh. ’S e 512p no 704p an rùn, le stiùireadh air a thaghadh bhon ìomhaigh. Faodaidh `driving_type` stiùireadh dìreach deireadh-gu-deireadh no cnàimhneach posaidh soilleir a chleachdadh.

- 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/gd/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 |  |  | Prompt a’ sònrachadh a’ bhidio às-chuir a thathar ag iarraidh. |
| `image_url` | `image` | string (image URL) | yes |  |  | URL ìomhaigh iomraidh caractar a bheir seachad an caractar ri bheothachadh no ri chur an àite cuspair, leis a’ bhidio dràibhidh a’ dearbhadh a’ bheothachaidh no an àiteachaidh. |
| `video_url` | `video` | string (video URL) | yes |  |  | Thoir seachad bhidio a bhios a’ stiùireadh gluasad tro URL, le aon duine, grunn dhaoine no beathach. |
| `mode` |  | enum (string) | no | `animation` | `animation`, `replacement` | Tagh mar a chleachdas tu an caractar iomraidh: `replacement` a’ gleidheadh an t-seallaidh thùsail ach a’ cur a’ charactair an àite a’ chuspair dràibhidh; `animation` a’ cur gluasad dràibhidh ris a’ charactar. |
| `driving_type` |  | enum (string) | no | `end_to_end` | `end_to_end`, `pose` | Tha gluasad beothachaidh a’ tighinn dìreach bho bhidio dràibhidh air a mhasgadh le SAM3 le `end_to_end`, am bun-roghainn agus an roghainn a thathar a’ moladh airson an làn sheasmhachd. Air neo, bidh `pose` a’ cleachdadh NLF/DWPose gus cnàimhneach follaiseach a thoirt seachad bhon bhidio sin, a’ tabhann barrachd smachd le in-churan dùbhlanach. |
| `subject_type` |  | enum (string) | no | `human` | `human`, `animal` | Taghadh cuspair a’ bhidio dràibhidh, le `animal` a’ rèiteachadh prompt lorg SAM3 airson cuspairean nach eil `human`. |
| `resolution` |  | enum (string) | no | `512p` | `512p`, `704p` | Dùmhlachd-bhreacaidh às-chuir le stiùireadh air a dhearbhadh gu fèin-obrachail a rèir co-mheas taobh na h-ìomhaigh iomraidh. Ann an cruth-tìre, tha 512p a’ mapadh gu 896x512 agus 704p gu 1280x704; bidh cruth-dhealbh a’ cleachdadh 512x896 agus 704x1280 fa leth. |
| `num_inference_steps` |  | integer | no | `40` | 2 – 50 | Àireamh cheumannan samplachaidh sgaoilidh. Le bhith ga mheudachadh leasaichear càileachd ach bheir e barrachd ùine. |
| `guidance_scale` |  | number | no | `5` | 1 – 10 | Neart stiùiridh classifier-free, a’ cothromachadh gèilleadh don phrompt agus cruthachalachd. |
| `shift` |  | number | no | `3` | 1 – 10 | Gluasad clàr-ama fuaim airson maidseadh srutha, le suidheachadh 3.0 air a mholadh nuair a thathar a’ cleachdadh 512p. |
| `seed` |  | integer \| null | no |  |  | Sìol gineadh a tha san fhreagairt, ge bith an deach a thoirt seachad gu soilleir no a thaghadh air thuaiream leis gun deach an in-chur fhàgail falamh. |
| `enable_safety_checker` |  | boolean | no | `true` |  | Faodar sgrìonadh a shocrachadh le false, ma tha cead aig an neach-gairm. |

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} | Faidhle bhidio a chaidh a chruthachadh le gineadh. |
| `seed` | integer | Sìol air a chleachdadh airson gineadh bhidio. |
| `preprocessing_video` | object {url, content_type, file_name, file_size} \| null | Bhidio dì-bhugadaidh anns a bheil an in-chur suidheachaidh Stage-A a chaidh a thoirt don mhodail sgaoilidh, ri fhaighinn dìreach le `output_preprocessing=true`. Tha a shusbaint an urra ri `driving_type`: bidh `end_to_end` a’ cleachdadh fiolm dràibhidh air a mhasgadh le SAM3, agus bidh `driving_type=pose` a’ cleachdadh cnàimhneach air a thoirt seachad le NLF/DWPose. |
| `preprocessing_mask_video` | object {url, content_type, file_name, file_size} \| null | Bhidio masg dràibhidh Stage-A airson dì-bhugachadh, ri fhaighinn dìreach le `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