# FLUX.3 Klein Image Editing API

> Golygydd FLUX.3 Klein gyda hyd at 10 cyfeirnod a gosod gwrthrychau mewn blychau terfyn dewisol

Yn golygu neu'n cyfansoddi delweddau o anogiad ac 1 i 10 cyfeiriad yn `image_urls`, y gall yr anogiad gyfeirio atynt yn ôl trefn, megis y ddelwedd gyntaf. Gall hyd at 32 `bounding_boxes` gadw, symud, newid maint, tynnu neu ychwanegu gwrthrychau, a enwir yn yr anogiad yn ôl label. Mae ehangu anogiad ymlaen yn ddiofyn. Mae'n dychwelyd 1 i 4 delwedd mewn jpeg, png neu webp.

- Model id: `blackforestlabs/flux-3/klein/edit-image`
- Made by: Black Forest Labs
- Category: Image Editing
- Output: image
- Price per run: from $0.008 / run of output image (cheapest run $0.008 (8 API credits))
- Run: `POST https://api.doitong.ru/v1/run/blackforestlabs/flux-3/klein/edit-image`
- Quote: `POST https://api.doitong.ru/v1/quote/blackforestlabs/flux-3/klein/edit-image`
- Docs page: https://doitong.com/cy/developers/models/blackforestlabs/flux-3/klein/edit-image

## Pricing

Price: **from $0.008 / run of output image** (the lowest tier; the quote prices your exact input). Price per run: 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 $0.009 = 9 API credits (1 run × $0.009).

Prices are the upstream price in USD, paid from the API balance in API credits (1000 API credits = 1 USD). `POST https://api.doitong.ru/v1/quote/blackforestlabs/flux-3/klein/edit-image` 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 |  |  | Ysgrifennwch gapsiwn llawn sy'n disgrifio'r ddelwedd ddymunol ar ôl golygu, gan nodi unrhyw gyfeiriadau yn ôl dilyniant, megis y ddelwedd gyntaf neu'r ail. |
| `enable_prompt_expansion` |  | boolean | no | `true` |  | Ehangu'r anogiad yn gapsiwn manwl cyn cynhyrchu, wedi'i alluogi pan fo true. Ar gyfer golygu, mae'r capsiwn yn seiliedig ar y delweddau cyfeirnod. |
| `seed` |  | integer \| null | no |  |  | Hadau ar gyfer delweddau atgynhyrchadwy: mae anogiad a hadau unfath yn cynhyrchu delwedd unfath pan nad yw fersiwn y model wedi newid. |
| `num_images` | `num_outputs` | integer | no | `1` | 1 – 4 | Cyfrif delweddau y gofynnir amdano ar gyfer cynhyrchu. |
| `enable_safety_checker` |  | boolean | no | `true` |  | Ysgogi gwiriwr diogelwch; mae true yn galluogi'r gwiriad. |
| `output_format` |  | enum (string) | no | `png` | `jpeg`, `png`, `webp` | Fformat ffeil y ddelwedd sy'n deillio. |
| `image_urls` | `images` | array of image URL | yes |  | 1 – 10 items | Delweddau cyfeirnod a ddefnyddir ar gyfer golygu neu gyfansoddi, wedi'u cyfyngu i 10. |
| `image_size` |  | object {width, height} \| enum (string) \| null | no |  | `square_hd`, `square`, `portrait_4_3`, `portrait_16_9`, `landscape_4_3`, `landscape_16_9` | Mae dimensiynau'r allbwn yn rhagosodedig i rai'r cyfeirnod cyntaf, wedi'u cyfyngu i 1 megapicsel ar gyfer cyfeiriadau lluosog neu wedi'u graddio i uchafswm o 4 megapicsel ar gyfer un cyfeirnod. Rhaid i feintiau penodol gael pob ochr rhwng 256 a 4096 picsel. |
| `bounding_boxes` |  | array of object {label, description, box, source_image_index, source_box, target_box} \| null | no |  | ≤ 32 items | Cynllun gwrthrychau dewisol ar gyfer cadw, symud, newid maint neu dynnu gwrthrychau cyfeirnod, neu osod gwrthrychau newydd. Mae cyfesurynnau'n dechrau yn (0, 0) yng nghornel chwith uchaf pob delwedd; cyfeiriwch at flychau gan ddefnyddio labeli yn yr anogiad, megis `<dragon>`. |
| `bounding_boxes[].label` |  | string \| null | no |  | ≤ 64 characters | Label gwrthrych byr ar gyfer y blwch, megis `dragon`; y rhagosodedig yw `obj_<n>`. Cynhwyswch `<dragon>` yn yr anogiad i gysylltu ei eiriau â'r blwch; ychwanegir blychau na chrybwyllir yn yr anogiad at yr olygfa. |
| `bounding_boxes[].description` |  | string | yes |  | ≤ 500 characters | Gwrthrych i'w rendro o fewn y blwch, gan gynnwys ei olwg. |
| `bounding_boxes[].box` |  | object {x_min, y_min, x_max, y_max} \| null | no |  |  | Lleoliad allbwn y gwrthrych, gan ddisodli `source_box`/`target_box` a defnyddio'r un ymddygiad lleoli â text-to-image. |
| `bounding_boxes[].box.x_min` |  | number | yes |  | 0 – 1 | Ffin chwith wedi'i mynegi mewn perthynas â lled y ddelwedd, o 0 i 1. |
| `bounding_boxes[].box.y_min` |  | number | yes |  | 0 – 1 | Ffin uchaf wedi'i mynegi mewn perthynas ag uchder y ddelwedd, o 0 i 1. |
| `bounding_boxes[].box.x_max` |  | number | yes |  | 0 – 1 | Ffin dde wedi'i mynegi mewn perthynas â lled y ddelwedd, o 0 i 1. |
| `bounding_boxes[].box.y_max` |  | number | yes |  | 0 – 1 | Ffin isaf wedi'i mynegi mewn perthynas ag uchder y ddelwedd, o 0 i 1. |
| `bounding_boxes[].source_image_index` |  | integer \| null | no |  | ≥ 0 | Dewis ffynhonnell gwrthrych: hepgorer ar gyfer gwrthrych newydd, neu nodwch gyfeirnod presennol yn ôl ei fynegai yn `image_urls`, gan gyfrif o 0. |
| `bounding_boxes[].source_box` |  | object {x_min, y_min, x_max, y_max} \| null | no |  |  | Lleoliad gwrthrych o fewn y ddelwedd gyfeirnod; rhaid darparu `source_image_index` hefyd. |
| `bounding_boxes[].source_box.x_min` |  | number | yes |  | 0 – 1 | Ffin chwith wedi'i mynegi mewn perthynas â lled y ddelwedd, o 0 i 1. |
| `bounding_boxes[].source_box.y_min` |  | number | yes |  | 0 – 1 | Ffin uchaf wedi'i mynegi mewn perthynas ag uchder y ddelwedd, o 0 i 1. |
| `bounding_boxes[].source_box.x_max` |  | number | yes |  | 0 – 1 | Ffin dde wedi'i mynegi mewn perthynas â lled y ddelwedd, o 0 i 1. |
| `bounding_boxes[].source_box.y_max` |  | number | yes |  | 0 – 1 | Ffin isaf wedi'i mynegi mewn perthynas ag uchder y ddelwedd, o 0 i 1. |
| `bounding_boxes[].target_box` |  | object {x_min, y_min, x_max, y_max} \| null | no |  |  | Blwch lleoliad allbwn y gwrthrych: mae symud neu newid maint yn gofyn am y ddau flwch, tra bod tynnu gwrthrych cyfeiriedig yn gofyn am adael y blwch hwn heb ei osod. |
| `bounding_boxes[].target_box.x_min` |  | number | yes |  | 0 – 1 | Ffin chwith wedi'i mynegi mewn perthynas â lled y ddelwedd, o 0 i 1. |
| `bounding_boxes[].target_box.y_min` |  | number | yes |  | 0 – 1 | Ffin uchaf wedi'i mynegi mewn perthynas ag uchder y ddelwedd, o 0 i 1. |
| `bounding_boxes[].target_box.x_max` |  | number | yes |  | 0 – 1 | Ffin dde wedi'i mynegi mewn perthynas â lled y ddelwedd, o 0 i 1. |
| `bounding_boxes[].target_box.y_max` |  | number | yes |  | 0 – 1 | Ffin isaf wedi'i mynegi mewn perthynas ag uchder y ddelwedd, o 0 i 1. |

File parameters (`images`) 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",
  "images": [
    "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg"
  ]
}
```

A fuller example:

```json
{
  "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
  "image_urls": [
    "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.ru/v1/run/blackforestlabs/flux-3/klein/edit-image?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_urls": [
      "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.ru/v1/requests/REQUEST_ID?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY"
```

### JavaScript

```javascript
const API = "https://api.doitong.ru/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/blackforestlabs/flux-3/klein/edit-image?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_urls": [
      "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.ru/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_urls": [
        "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/blackforestlabs/flux-3/klein/edit-image", 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.ru/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": "blackforestlabs/flux-3/klein/edit-image",
      "input": {
        "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
        "image_urls": [
          "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": "blackforestlabs/flux-3/klein/edit-image",
  "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": 9,
    "usd": "0.009",
    "charged": 9,
    "refunded": 0
  },
  "input": {
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field",
    "image_urls": [
      "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
      }
    ],
    "timings": {},
    "seed": 42,
    "has_nsfw_concepts": [
      false
    ],
    "prompt": "string"
  },
  "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.ru/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t",
    "cancel": "https://api.doitong.ru/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t/cancel"
  }
}
```

### Output fields (`output`)

| Field | Type | Description |
|---|---|---|
| `images` | array of object {url, content_type, file_name, file_size, width, height} | Delweddau a gynhyrchir gan y model. |
| `timings` | object | Gwybodaeth amseru ar gyfer y broses gynhyrchu. |
| `seed` | integer | Hadau cynhyrchu ar gyfer y ddelwedd gyntaf. |
| `has_nsfw_concepts` | array of boolean | Yn nodi a yw cysyniadau NSFW yn ymddangos yn y delweddau a gynhyrchir. |
| `prompt` | string | Anogiad a ddefnyddir wrth gynhyrchu delweddau. |

## Related models

- [FLUX.3 Klein](https://doitong.com/developers/models/blackforestlabs/flux-3/klein/text-to-image.md) (`blackforestlabs/flux-3/klein/text-to-image`): from $0.008 / run of output image
- [FLUX.1 Kontext \[pro\]](https://doitong.com/developers/models/flux-pro/kontext.md) (`flux-pro/kontext`): $0.04 / image
- [GPT Image 2.5 Edit](https://doitong.com/developers/models/openai/gpt-image-2.5/flare/edit.md) (`openai/gpt-image-2.5/flare/edit`): from $0.12 / image
- [Nano Banana 2 Edit](https://doitong.com/developers/models/nano-banana-2/edit.md) (`nano-banana-2/edit`): from $0.06 / image
- [Nano Banana Pro Edit](https://doitong.com/developers/models/nano-banana-pro/edit.md) (`nano-banana-pro/edit`): from $0.15 / image
- [Qwen Image 3 Edit](https://doitong.com/developers/models/alibaba/qwen-image-3/edit.md) (`alibaba/qwen-image-3/edit`): from $0.04 / image
- [Seedream 5.0 Pro Edit](https://doitong.com/developers/models/bytedance/seedream/v5/pro/edit.md) (`bytedance/seedream/v5/pro/edit`): from $0.0675 / run of output image
- [FLUX 2 Edit](https://doitong.com/developers/models/flux-2/edit.md) (`flux-2/edit`): $0.012 / megapixel

## Links

- HTML page: https://doitong.com/developers/models/blackforestlabs/flux-3/klein/edit-image
- 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=blackforestlabs/flux-3/klein/edit-image
- Errors: https://doitong.com/developers/docs/errors
- Model details as JSON: https://api.doitong.ru/v1/models/blackforestlabs/flux-3/klein/edit-image