# FLUX.3 Klein Image Editing API

> He kaiwhakatika FLUX.3 Klein me te 10 tohutoro te mea nui rawa me te whakatakoto ahanoa ki ngā pouaka here kōwhiringa

Ka whakatika, ka waihanga rānei i ngā atahanga mai i tētahi tohutohu me ngā tohutoro 1 ki te 10 kei `image_urls`, ka taea te whakahuatia e te tohutohu mā te raupapa, pēnei i te atahanga tuatahi. Tae atu ki te 32 `bounding_boxes` hei pupuri, neke, whakarahi, tango, tāpiri rānei i ngā ahanoa, ka whakaingoatia i te tohutohu mā te tapanga. Ka whakakāngia te whakawhānui tohutohu hei taunoa. Ka whakahokia ngā atahanga 1 ki te 4 i te jpeg, png, webp rānei.

- 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/mi/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 |  |  | Tuhia he tapanga katoa e whakaahua ana i te atahanga e hiahiatia ana i muri i te whakatika, me te tautuhi i ngā tohutoro mā te raupapa, pērā i te atahanga tuatahi, tuarua rānei. |
| `enable_prompt_expansion` |  | boolean | no | `true` |  | Whakawhānui tohutohu hei tapanga taipitopito i mua i te whakaputanga, ka whakahohea ina true. Mō te whakatika, ka ū te tapanga ki ngā atahanga tohutoro. |
| `seed` |  | integer \| null | no |  |  | Kākano mō ngā atahanga ka taea te whakahoki anō: mā te tohutohu me te kākano ōrite ka puta he atahanga ōrite ina kāore te putanga tauira i whakarerekēhia. |
| `num_images` | `num_outputs` | integer | no | `1` | 1 – 4 | Te tatau atahanga e tonoa ana mō te whakaputanga. |
| `enable_safety_checker` |  | boolean | no | `true` |  | Whakahohe kaitaki haumaru; mā true e whakahohe te tirotiro. |
| `output_format` |  | enum (string) | no | `png` | `jpeg`, `png`, `webp` | Te hōputu kōnae mō te atahanga ka puta. |
| `image_urls` | `images` | array of image URL | yes |  | 1 – 10 items | Ngā atahanga tohutoro mō te whakatika, te tito rānei, kaua e neke atu i te 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` | Ka taunoa ngā rahinga putanga ki ērā o te tohutoro tuatahi, ka herea ki te 1 mekapika mō ngā tohutoro maha, ka whakarahi rānei ki te 4 mekapika mō te tohutoro kotahi. Me noho ia taha o ngā rahinga pū i waenga i te 256 me te 4096 pika. |
| `bounding_boxes` |  | array of object {label, description, box, source_image_index, source_box, target_box} \| null | no |  | ≤ 32 items | Tahora ahanoa kōwhiringa mō te pupuri, neke, whakarahi, tango rānei i ngā ahanoa tohutoro, mō te whakatakoto ahanoa hou rānei. Ka tīmata ngā taunga ki (0, 0) i te kokonga mauī-runga o ia atahanga; tirohia ngā pouaka mā ngā tapanga i te tohutohu, pērā i `<dragon>`. |
| `bounding_boxes[].label` |  | string \| null | no |  | ≤ 64 characters | Tapanga poto mō te pouaka, pērā i `dragon`; ko `obj_<n>` te taunoa. Whakaurua `<dragon>` ki te tohutohu hei hono i ōna kupu ki te pouaka; ka tāpirihia ngā pouaka kāore i whakahuatia ki te horopaki. |
| `bounding_boxes[].description` |  | string | yes |  | ≤ 500 characters | Ahanoa hei whakaputa i roto i te pouaka, tae atu ki tōna āhua. |
| `bounding_boxes[].box` |  | object {x_min, y_min, x_max, y_max} \| null | no |  |  | Tūnga putanga mō te ahanoa, hei whakakapi i `source_box`/`target_box` me te whakamahi i te whanonga tūnga ōrite ki text-to-image. |
| `bounding_boxes[].box.x_min` |  | number | yes |  | 0 – 1 | Rāhenga mauī e whakaatuhia ana ki te whānui atahanga, mai i te 0 ki te 1. |
| `bounding_boxes[].box.y_min` |  | number | yes |  | 0 – 1 | Rāhenga runga e whakaatuhia ana ki te teitei atahanga, mai i te 0 ki te 1. |
| `bounding_boxes[].box.x_max` |  | number | yes |  | 0 – 1 | Rāhenga matau e whakaatuhia ana ki te whānui atahanga, mai i te 0 ki te 1. |
| `bounding_boxes[].box.y_max` |  | number | yes |  | 0 – 1 | Rāhenga raro e whakaatuhia ana ki te teitei atahanga, mai i te 0 ki te 1. |
| `bounding_boxes[].source_image_index` |  | integer \| null | no |  | ≥ 0 | Kōwhiringa pūtake ahanoa: waiho mō tētahi ahanoa hou, tautuhia rānei he tohutoro kei roto mā tōna taupū i `image_urls`, ka tatau mai i te 0. |
| `bounding_boxes[].source_box` |  | object {x_min, y_min, x_max, y_max} \| null | no |  |  | Tauwāhi ahanoa i roto i te atahanga tohutoro; me whakarato hoki `source_image_index`. |
| `bounding_boxes[].source_box.x_min` |  | number | yes |  | 0 – 1 | Rāhenga mauī e whakaatuhia ana ki te whānui atahanga, mai i te 0 ki te 1. |
| `bounding_boxes[].source_box.y_min` |  | number | yes |  | 0 – 1 | Rāhenga runga e whakaatuhia ana ki te teitei atahanga, mai i te 0 ki te 1. |
| `bounding_boxes[].source_box.x_max` |  | number | yes |  | 0 – 1 | Rāhenga matau e whakaatuhia ana ki te whānui atahanga, mai i te 0 ki te 1. |
| `bounding_boxes[].source_box.y_max` |  | number | yes |  | 0 – 1 | Rāhenga raro e whakaatuhia ana ki te teitei atahanga, mai i te 0 ki te 1. |
| `bounding_boxes[].target_box` |  | object {x_min, y_min, x_max, y_max} \| null | no |  |  | Pouaka tūnga putanga mō te ahanoa: me rua ngā pouaka mō te neke, te whakarahi rānei, engari mō te tango i tētahi ahanoa tohutoro me waiho tēnei pouaka kia kore tautuhia. |
| `bounding_boxes[].target_box.x_min` |  | number | yes |  | 0 – 1 | Rāhenga mauī e whakaatuhia ana ki te whānui atahanga, mai i te 0 ki te 1. |
| `bounding_boxes[].target_box.y_min` |  | number | yes |  | 0 – 1 | Rāhenga runga e whakaatuhia ana ki te teitei atahanga, mai i te 0 ki te 1. |
| `bounding_boxes[].target_box.x_max` |  | number | yes |  | 0 – 1 | Rāhenga matau e whakaatuhia ana ki te whānui atahanga, mai i te 0 ki te 1. |
| `bounding_boxes[].target_box.y_max` |  | number | yes |  | 0 – 1 | Rāhenga raro e whakaatuhia ana ki te teitei atahanga, mai i te 0 ki te 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} | Ngā atahanga i whakaputaina e te tauira. |
| `timings` | object | Ngā pārongo wā mō te tukanga whakaputa. |
| `seed` | integer | Kākano whakaputa mō te atahanga tuatahi. |
| `has_nsfw_concepts` | array of boolean | Ka tohu mēnā ka puta ngā ariā NSFW i ngā atahanga kua whakaputaina. |
| `prompt` | string | Te tohutohu e whakamahia ana i te whakaputanga atahanga. |

## 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