# FLUX.3 Klein Image Editing API

> Urejevalnik FLUX.3 Klein z največ 10 referencami in izbirnim umeščanjem predmetov z omejitvenimi okvirji

Uredi ali sestavi slike iz poziva in 1 do 10 referenc v `image_urls`, na katere se lahko poziv sklicuje po vrstnem redu, na primer na prvo sliko. Do 32 `bounding_boxes` lahko ohrani, premakne, spremeni velikost, odstrani ali doda predmete, poimenovane z oznako v pozivu. Razširitev poziva je privzeto vklopljena. Vrne od 1 do 4 slik v jpeg, png ali 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/sl/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 |  |  | Napišite celoten napis, ki opisuje želeno sliko po urejanju, in reference določite z njihovim zaporedjem, na primer kot prvo ali drugo sliko. |
| `enable_prompt_expansion` |  | boolean | no | `true` |  | Razširjanje poziva v podroben napis pred generiranjem, omogočeno, ko je vrednost true. Pri urejanju je napis utemeljen na referenčnih slikah. |
| `seed` |  | integer \| null | no |  |  | Seed za ponovljive slike: enak poziv in seed ustvarita enako sliko, če različica modela ostane nespremenjena. |
| `num_images` | `num_outputs` | integer | no | `1` | 1 – 4 | Število slik, zahtevanih za generiranje. |
| `enable_safety_checker` |  | boolean | no | `true` |  | Aktivacija varnostnega preverjanja; true omogoči preverjanje. |
| `output_format` |  | enum (string) | no | `png` | `jpeg`, `png`, `webp` | Oblika datoteke končne slike. |
| `image_urls` | `images` | array of image URL | yes |  | 1 – 10 items | Referenčne slike, uporabljene za urejanje ali sestavljanje; največ 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` | Izhodne dimenzije so privzeto enake dimenzijam prve reference, pri več referencah omejene na 1 megapiksel oziroma pri eni referenci povečane na največ 4 megapiksele. Pri izrecnih velikostih mora biti vsaka stran dolga med 256 in 4096 slikovnih pik. |
| `bounding_boxes` |  | array of object {label, description, box, source_image_index, source_box, target_box} \| null | no |  | ≤ 32 items | Izbirna postavitev predmetov za ohranjanje, premikanje, spreminjanje velikosti ali odstranjevanje referenčnih predmetov oziroma za postavljanje novih predmetov. Koordinate se v vsaki sliki začnejo pri (0, 0) v zgornjem levem kotu; polja določite z oznakami v pozivu, na primer `<dragon>`. |
| `bounding_boxes[].label` |  | string \| null | no |  | ≤ 64 characters | Kratka oznaka predmeta za polje, na primer `dragon`; privzeto je `obj_<n>`. V poziv vključite `<dragon>`, da besede povežete s poljem; polja, ki v pozivu niso omenjena, se dodajo v prizor. |
| `bounding_boxes[].description` |  | string | yes |  | ≤ 500 characters | Predmet, ki se upodobi znotraj polja, vključno z njegovim videzom. |
| `bounding_boxes[].box` |  | object {x_min, y_min, x_max, y_max} \| null | no |  |  | Izhodna postavitev predmeta, ki nadomesti `source_box`/`target_box` in uporablja enako vedenje postavitve kot text-to-image. |
| `bounding_boxes[].box.x_min` |  | number | yes |  | 0 – 1 | Leva meja, izražena glede na širino slike, od 0 do 1. |
| `bounding_boxes[].box.y_min` |  | number | yes |  | 0 – 1 | Zgornja meja, izražena glede na višino slike, od 0 do 1. |
| `bounding_boxes[].box.x_max` |  | number | yes |  | 0 – 1 | Desna meja, izražena glede na širino slike, od 0 do 1. |
| `bounding_boxes[].box.y_max` |  | number | yes |  | 0 – 1 | Spodnja meja, izražena glede na višino slike, od 0 do 1. |
| `bounding_boxes[].source_image_index` |  | integer \| null | no |  | ≥ 0 | Izbira vira predmeta: izpustite za nov predmet ali določite obstoječo referenco z njenim indeksom v `image_urls`, pri čemer se štetje začne z 0. |
| `bounding_boxes[].source_box` |  | object {x_min, y_min, x_max, y_max} \| null | no |  |  | Položaj predmeta znotraj referenčne slike; navesti morate tudi `source_image_index`. |
| `bounding_boxes[].source_box.x_min` |  | number | yes |  | 0 – 1 | Leva meja, izražena glede na širino slike, od 0 do 1. |
| `bounding_boxes[].source_box.y_min` |  | number | yes |  | 0 – 1 | Zgornja meja, izražena glede na višino slike, od 0 do 1. |
| `bounding_boxes[].source_box.x_max` |  | number | yes |  | 0 – 1 | Desna meja, izražena glede na širino slike, od 0 do 1. |
| `bounding_boxes[].source_box.y_max` |  | number | yes |  | 0 – 1 | Spodnja meja, izražena glede na višino slike, od 0 do 1. |
| `bounding_boxes[].target_box` |  | object {x_min, y_min, x_max, y_max} \| null | no |  |  | Izhodno polje postavitve predmeta: za premikanje ali spreminjanje velikosti sta potrebni obe polji, pri odstranjevanju referenčnega predmeta pa mora to polje ostati nenastavljeno. |
| `bounding_boxes[].target_box.x_min` |  | number | yes |  | 0 – 1 | Leva meja, izražena glede na širino slike, od 0 do 1. |
| `bounding_boxes[].target_box.y_min` |  | number | yes |  | 0 – 1 | Zgornja meja, izražena glede na višino slike, od 0 do 1. |
| `bounding_boxes[].target_box.x_max` |  | number | yes |  | 0 – 1 | Desna meja, izražena glede na širino slike, od 0 do 1. |
| `bounding_boxes[].target_box.y_max` |  | number | yes |  | 0 – 1 | Spodnja meja, izražena glede na višino slike, od 0 do 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} | Slike, ustvarjene z modelom. |
| `timings` | object | Podatki o času postopka generiranja. |
| `seed` | integer | Seed generiranja za prvo sliko. |
| `has_nsfw_concepts` | array of boolean | Označuje, ali se v generiranih slikah pojavljajo koncepti NSFW. |
| `prompt` | string | Poziv, uporabljen pri generiranju slike. |

## 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