# Image Editing Expression Change API

> آزاد متن کے پرامپٹ سے چہرے کے تاثرات تبدیل کرتا ہے، ڈیفالٹ اداس ہے

`image_url` تصویر میں چہرے کو `prompt` میں دیے گئے جذبے کے مطابق ایڈٹ کرتا ہے، جس کا ڈیفالٹ sad ہے۔ چونکہ یہ آزاد متن ہے، اس لیے کسی بھی تاثر، جیسے مسکراہٹ یا سنجیدہ انداز، کی درخواست کی جا سکتی ہے۔ اختیارات میں `guidance_scale` (0 سے 20)، `num_inference_steps` (1 سے 50)، `seed`، نو `aspect_ratio` انتخاب اور jpeg یا png آؤٹ پٹ شامل ہیں۔

- Model id: `image-editing/expression-change`
- Made by: Utility
- Category: Image Editing
- Output: image
- Price: $0.04 / image (cheapest run $0.04 (40 API credits))
- Run: `POST https://api.doitong.com/v1/run/image-editing/expression-change`
- Quote: `POST https://api.doitong.com/v1/quote/image-editing/expression-change`
- Docs page: https://doitong.com/ur/developers/models/image-editing/expression-change

## Pricing

Price: **$0.04 / image**. Billed per generated image.

The full example input below costs $0.04 = 40 API credits (1 image × 40 API credits).

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/image-editing/expression-change` 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 |
|---|---|---|---|---|---|---|
| `image_url` | `image` | string (image URL) | yes |  |  | omni ماڈل کو پرامپٹ کرنے کے لیے استعمال ہونے والی تصویر۔ |
| `guidance_scale` |  | number | no | `3.5` | 0 – 20 | تصویر کے انتخاب کے لیے پرامپٹ کی پابندی کی طاقت، CFG (Classifier Free Guidance) کے طور پر ظاہر کی جاتی ہے۔ |
| `num_inference_steps` |  | integer | no | `30` | 1 – 50 | sampling کے دوران استعمال ہونے والے inference مراحل کی تعداد۔ |
| `safety_tolerance` |  | enum (string) | no | `2` | `1`, `2`, `3`, `4`, `5`, `6` | تخلیق شدہ تصاویر کے لیے حفاظتی ترتیب: سب سے زیادہ نرم فلٹرنگ کے لیے 6 یا سب سے سخت کے لیے 1 منتخب کریں۔ |
| `output_format` |  | enum (string) | no | `jpeg` | `jpeg`, `png` | نتیجہ خیز تصویر کا فائل فارمیٹ۔ |
| `aspect_ratio` |  | enum (string) \| null | no |  | `21:9`, `16:9`, `4:3`, `3:2`, `1:1`, `2:3`, `3:4`, `9:16`, `9:21` | نتیجے میں حاصل ہونے والی تصویر کا aspect ratio۔ |
| `seed` |  | integer \| null | no |  |  | قابلِ تکرار تصاویر کے لیے سیڈ: ماڈل ورژن تبدیل نہ ہونے پر یکساں پرامپٹ اور سیڈ یکساں تصویر تیار کرتے ہیں۔ |
| `prompt` |  | string | no | `sad` |  | تصویر میں استعمال ہونے والا چہرے کا تاثر۔ |

File parameters (`image`) 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
{
  "image": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg"
}
```

A fuller example:

```json
{
  "image_url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg"
}
```

## 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/image-editing/expression-change?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "image_url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg"
  }'

# 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/image-editing/expression-change?wait=20", {
  method: "POST",
  headers,
  body: JSON.stringify({
    "image_url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg"
  }),
});
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 = {
    "image_url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg",
}

# Run the model; wait up to 20 s for the finished result in the same call
r = requests.post(API + "/run/image-editing/expression-change", 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": "image-editing/expression-change",
      "input": {
        "image_url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg"
      },
      "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": "image-editing/expression-change",
  "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": 40,
    "usd": "0.04",
    "charged": 40,
    "refunded": 0
  },
  "input": {
    "image_url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg"
  },
  "output": {
    "images": [
      {
        "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.jpeg",
        "content_type": "image/jpeg",
        "file_name": "0-output.jpeg",
        "file_size": 1843200,
        "width": 1024,
        "height": 768
      }
    ],
    "seed": 42
  },
  "outputs": [
    {
      "type": "image",
      "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.jpeg",
      "content_type": "image/jpeg",
      "file_size": 1843200,
      "width": 1024,
      "height": 768,
      "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 |
|---|---|---|
| `images` | array of object {url, content_type, file_name, file_size, width, height} |  |
| `seed` | integer |  |

## Related models

- [Image Editing](https://doitong.com/developers/models/image-editing/baby-version.md) (`image-editing/baby-version`): $0.04 / image
- [Image Editing Age Progression](https://doitong.com/developers/models/image-editing/age-progression.md) (`image-editing/age-progression`): $0.04 / image
- [Image Editing Background Change](https://doitong.com/developers/models/image-editing/background-change.md) (`image-editing/background-change`): $0.04 / image
- [Image Editing Broccoli Haircut](https://doitong.com/developers/models/image-editing/broccoli-haircut.md) (`image-editing/broccoli-haircut`): $0.04 / image
- [Image Editing Cartoonify](https://doitong.com/developers/models/image-editing/cartoonify.md) (`image-editing/cartoonify`): $0.04 / image
- [Image Editing Color Correction](https://doitong.com/developers/models/image-editing/color-correction.md) (`image-editing/color-correction`): $0.04 / image
- [Image Editing Face Enhancement](https://doitong.com/developers/models/image-editing/face-enhancement.md) (`image-editing/face-enhancement`): $0.04 / image
- [Image Editing Hair Change](https://doitong.com/developers/models/image-editing/hair-change.md) (`image-editing/hair-change`): $0.04 / image

## Links

- HTML page: https://doitong.com/developers/models/image-editing/expression-change
- 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=image-editing/expression-change
- Errors: https://doitong.com/developers/docs/errors
- Model details as JSON: https://api.doitong.com/v1/models/image-editing/expression-change