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POST
/
v1
/
flux-pro-1.1-ultra
Generate an image with FLUX1.1 [pro] ultra mode
curl --request POST \
  --url https://api.bfl.ai/v1/flux-pro-1.1-ultra \
  --header 'Content-Type: application/json' \
  --header 'x-key: <api-key>' \
  --data '
{
  "prompt": "A beautiful landscape with mountains and a lake",
  "prompt_upsampling": false,
  "seed": 42,
  "aspect_ratio": "16:9",
  "safety_tolerance": 2,
  "output_format": "jpeg",
  "raw": false,
  "image_prompt": "<string>",
  "image_prompt_strength": 0.1,
  "webhook_url": "<string>",
  "webhook_secret": "<string>"
}
'
import requests

url = "https://api.bfl.ai/v1/flux-pro-1.1-ultra"

payload = {
    "prompt": "A beautiful landscape with mountains and a lake",
    "prompt_upsampling": False,
    "seed": 42,
    "aspect_ratio": "16:9",
    "safety_tolerance": 2,
    "output_format": "jpeg",
    "raw": False,
    "image_prompt": "<string>",
    "image_prompt_strength": 0.1,
    "webhook_url": "<string>",
    "webhook_secret": "<string>"
}
headers = {
    "x-key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)
const options = {
  method: 'POST',
  headers: {'x-key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    prompt: 'A beautiful landscape with mountains and a lake',
    prompt_upsampling: false,
    seed: 42,
    aspect_ratio: '16:9',
    safety_tolerance: 2,
    output_format: 'jpeg',
    raw: false,
    image_prompt: '<string>',
    image_prompt_strength: 0.1,
    webhook_url: '<string>',
    webhook_secret: '<string>'
  })
};

fetch('https://api.bfl.ai/v1/flux-pro-1.1-ultra', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));
<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.bfl.ai/v1/flux-pro-1.1-ultra",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'prompt' => 'A beautiful landscape with mountains and a lake',
    'prompt_upsampling' => false,
    'seed' => 42,
    'aspect_ratio' => '16:9',
    'safety_tolerance' => 2,
    'output_format' => 'jpeg',
    'raw' => false,
    'image_prompt' => '<string>',
    'image_prompt_strength' => 0.1,
    'webhook_url' => '<string>',
    'webhook_secret' => '<string>'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "x-key: <api-key>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}
package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.bfl.ai/v1/flux-pro-1.1-ultra"

	payload := strings.NewReader("{\n  \"prompt\": \"A beautiful landscape with mountains and a lake\",\n  \"prompt_upsampling\": false,\n  \"seed\": 42,\n  \"aspect_ratio\": \"16:9\",\n  \"safety_tolerance\": 2,\n  \"output_format\": \"jpeg\",\n  \"raw\": false,\n  \"image_prompt\": \"<string>\",\n  \"image_prompt_strength\": 0.1,\n  \"webhook_url\": \"<string>\",\n  \"webhook_secret\": \"<string>\"\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("x-key", "<api-key>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}
HttpResponse<String> response = Unirest.post("https://api.bfl.ai/v1/flux-pro-1.1-ultra")
  .header("x-key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"prompt\": \"A beautiful landscape with mountains and a lake\",\n  \"prompt_upsampling\": false,\n  \"seed\": 42,\n  \"aspect_ratio\": \"16:9\",\n  \"safety_tolerance\": 2,\n  \"output_format\": \"jpeg\",\n  \"raw\": false,\n  \"image_prompt\": \"<string>\",\n  \"image_prompt_strength\": 0.1,\n  \"webhook_url\": \"<string>\",\n  \"webhook_secret\": \"<string>\"\n}")
  .asString();
require 'uri'
require 'net/http'

url = URI("https://api.bfl.ai/v1/flux-pro-1.1-ultra")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["x-key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"prompt\": \"A beautiful landscape with mountains and a lake\",\n  \"prompt_upsampling\": false,\n  \"seed\": 42,\n  \"aspect_ratio\": \"16:9\",\n  \"safety_tolerance\": 2,\n  \"output_format\": \"jpeg\",\n  \"raw\": false,\n  \"image_prompt\": \"<string>\",\n  \"image_prompt_strength\": 0.1,\n  \"webhook_url\": \"<string>\",\n  \"webhook_secret\": \"<string>\"\n}"

response = http.request(request)
puts response.read_body
{
  "id": "<string>",
  "polling_url": "<string>",
  "cost": 123,
  "input_mp": 123,
  "output_mp": 123
}
{
  "detail": [
    {
      "loc": [
        "<string>"
      ],
      "msg": "<string>",
      "type": "<string>"
    }
  ]
}

Authorizations

​
x-key
string
header
required

Body

application/json
​
prompt
string | null
default:""

The prompt to use for image generation.

Example:

"A beautiful landscape with mountains and a lake"

​
prompt_upsampling
boolean
default:false

Whether to perform upsampling on the prompt. If active, automatically modifies the prompt for more creative generation.

​
seed
integer | null

Optional seed for reproducibility. If not provided, a random seed will be used.

Example:

42

​
aspect_ratio
string
default:16:9

Aspect ratio of the image between 21:9 and 9:21

​
safety_tolerance
integer
default:2

Tolerance level for input and output moderation. Between 0 and 6, 0 being most strict, 6 being least strict.

Required range: 0 <= x <= 6
Example:

2

​
output_format
enum<string> | null
default:jpeg

Output format for the generated image. Can be 'jpeg', 'png', or 'webp'.

Available options:
jpeg,
png,
webp
​
raw
boolean
default:false

Generate less processed, more natural-looking images

Example:

false

​
image_prompt
string | null

Optional image to remix in base64 format

​
image_prompt_strength
number
default:0.1

Blend between the prompt and the image prompt

Required range: 0 <= x <= 1
​
webhook_url
string<uri> | null

URL to receive webhook notifications

Required string length: 1 - 2083
​
webhook_secret
string | null

Optional secret for webhook signature verification

Response

Successful Response

​
id
string
required
​
polling_url
string
required
​
cost
number | null

Cost in credits for this request

​
input_mp
number | null

Input megapixels (2 decimal places)

​
output_mp
number | null

Output megapixels (2 decimal places)