# Wan 2.2 Outpainting — API Reference

Model ID: `model_wan-2-2-vace-fun-a14b-outpainting`

---

## Authentication

Scenario API uses HTTP Basic Auth. Encode your credentials in Base64 and pass them as the `Authorization` header.

```
Authorization: Basic base64("<API_KEY>:<API_SECRET>")
```

- **API_KEY** and **API_SECRET** are found in your [Scenario Project Settings](https://app.scenario.com/team&tab=project_api_keys) under API Keys.
- In shell: `$(echo -n '<API_KEY>:<API_SECRET>' | base64)`
- In JavaScript: `btoa("<API_KEY>:<API_SECRET>")`
- In Python: `base64.b64encode(f"{api_key}:{api_secret}".encode()).decode()`

---

## Generate

**Endpoint:** `POST https://api.cloud.scenario.com/v1/generate/custom/model_wan-2-2-vace-fun-a14b-outpainting`

### Parameters

| Parameter | Type | Required | Default | Description |
|-----------|------|----------|---------|-------------|
| `prompt` | string | yes | - | Text prompt for video generation |
| `expandLeft` | boolean | - | `true` | Expand video to the left |
| `expandRight` | boolean | - | `true` | Expand video to the right |
| `expandTop` | boolean | - | `true` | Expand video to the top |
| `expandBottom` | boolean | - | `true` | Expand video to the bottom |
| `expandRatio` | number | - | `0.25` | Amount of expansion. This is a float value between 0 and 1, where 0.25 adds 25% to the original video size on the specified sides. |
| `negativePrompt` | string | - | - | Text negative prompt for video generation |
| `matchInputNumFrames` | boolean | - | `false` | Match the number of frames from input video |
| `numFrames` | number | - | `81` | Number of frames to generate |
| `matchInputFramesPerSecond` | boolean | - | `false` | If true, the frames per second of the generated video will match the input video. If false, the frames per second will be determined by the Frames Per Seconds parameter. |
| `framesPerSecond` | number | - | `16` | Frames per second of the generated video. Ignored if match_input_frames_per_second is true. Default value: 16 |
| `resolution` | string | - | `720p` | Output video resolution |
| `aspectRatio` | string | - | `auto` | Aspect ratio for output video |
| `numInferenceSteps` | number | - | `30` | Number of inference steps |
| `guidanceScale` | number | - | `5` | Guidance scale for generation |
| `enablePromptExpansion` | boolean | - | `false` | Enable prompt expansion |
| `acceleration` | string | - | `regular` | Processing acceleration mode |
| `videoQuality` | string | - | `high` | Output video quality |
| `videoWriteMode` | string | - | `balanced` | Video writing mode |
| `numInterpolatedFrames` | number | - | `1` | Number of frames to interpolate between the original frames. A value of 0 means no interpolation |
| `interpolatorModel` | string | - | `film` | Interpolator model to use |
| `seed` | number | - | - | Random seed for reproducibility. If None, a random seed is chosen. |

### Example Requests

**cURL**

```bash
curl -X POST "https://api.cloud.scenario.com/v1/generate/custom/model_wan-2-2-vace-fun-a14b-outpainting" \
  -H "Authorization: Basic $(echo -n '<API_KEY>:<API_SECRET>' | base64)" \
  -H "Content-Type: application/json" \
  --data-binary @- <<'EOF'
{
  "prompt": "A fantasy landscape",
  "expandLeft": true,
  "expandRight": true,
  "expandTop": true,
  "expandBottom": true,
  "expandRatio": 0.25,
  "matchInputNumFrames": false,
  "numFrames": 81,
  "matchInputFramesPerSecond": false,
  "framesPerSecond": 16,
  "resolution": "720p",
  "aspectRatio": "auto",
  "numInferenceSteps": 30,
  "guidanceScale": 5,
  "enablePromptExpansion": false,
  "acceleration": "regular",
  "videoQuality": "high",
  "videoWriteMode": "balanced",
  "numInterpolatedFrames": 1,
  "interpolatorModel": "film"
}
EOF
```

**Python**

```python
import requests
import base64

api_key = "<API_KEY>"
api_secret = "<API_SECRET>"
token = base64.b64encode(f"{api_key}:{api_secret}".encode()).decode()

url = "https://api.cloud.scenario.com/v1/generate/custom/model_wan-2-2-vace-fun-a14b-outpainting"
headers = {
    "Authorization": f"Basic {token}",
    "Content-Type": "application/json"
}
payload = {
    "prompt": "A fantasy landscape",
    "expandLeft": True,
    "expandRight": True,
    "expandTop": True,
    "expandBottom": True,
    "expandRatio": 0.25,
    "matchInputNumFrames": False,
    "numFrames": 81,
    "matchInputFramesPerSecond": False,
    "framesPerSecond": 16,
    "resolution": "720p",
    "aspectRatio": "auto",
    "numInferenceSteps": 30,
    "guidanceScale": 5,
    "enablePromptExpansion": False,
    "acceleration": "regular",
    "videoQuality": "high",
    "videoWriteMode": "balanced",
    "numInterpolatedFrames": 1,
    "interpolatorModel": "film"
}

response = requests.post(url, headers=headers, json=payload)
print(response.json())
```

**JavaScript**

```javascript
const token = btoa("<API_KEY>:<API_SECRET>");

const body = {
  "prompt": "A fantasy landscape",
  "expandLeft": true,
  "expandRight": true,
  "expandTop": true,
  "expandBottom": true,
  "expandRatio": 0.25,
  "matchInputNumFrames": false,
  "numFrames": 81,
  "matchInputFramesPerSecond": false,
  "framesPerSecond": 16,
  "resolution": "720p",
  "aspectRatio": "auto",
  "numInferenceSteps": 30,
  "guidanceScale": 5,
  "enablePromptExpansion": false,
  "acceleration": "regular",
  "videoQuality": "high",
  "videoWriteMode": "balanced",
  "numInterpolatedFrames": 1,
  "interpolatorModel": "film"
};

const response = await fetch(
  "https://api.cloud.scenario.com/v1/generate/custom/model_wan-2-2-vace-fun-a14b-outpainting",
  {
    method: "POST",
    headers: {
      "Authorization": `Basic ${token}`,
      "Content-Type": "application/json",
    },
    body: JSON.stringify(body),
  }
);

const data = await response.json();
console.log(data);
```

---

## Retrieve Results

After submitting a generation request, you receive a `jobId`. Poll the job status endpoint until the job completes.

**Endpoint:** `GET https://api.cloud.scenario.com/v1/jobs/{jobId}`

**Headers:**
```
Authorization: Basic base64("<API_KEY>:<API_SECRET>")
```

Poll until `job.status` is `"success"`. The generated asset IDs are in `job.metadata.assetIds`.

**Example response:**
```json
{
  "job": {
    "jobId": "job_abc123",
    "status": "success",
    "metadata": {
      "assetIds": [
        "asset_abc123"
      ]
    }
  }
}
```

> **Important:** Generated asset URLs are **temporary** and expire after a short period. Download and store any images you wish to keep before the URL expires. More info: [Content Delivery Network (CDN)](https://docs.scenario.com/docs/content-delivery-network-cdn).

---

*Generated by [Scenario](https://app.scenario.com)*