Flux LoRA Fill

Flux LoRA — Flux LoRA Fill.

Input

Add your inputs and customize the generation settings.

The prompt to generate an image from.
Upload, drag and drop, or paste a public HTTPS URL.
Selected image

URL of image to use for fill operation
Upload, drag and drop, or paste a public HTTPS URL.
Selected image

The mask to area to Inpaint in.

Customize your input with more control.

Calculate credits for your selected settings before generating.

Result & Pricing

Image output — your generated image will appear here.

Your image will appear here

Choose your inputs and customize your settings.

Model pricing (tax excluded) per processed image megapixel

SpecificationWebot INR
Rate₹4.19
Calculate credits in the input panel for your selected settings.

Prices, estimates and credit deductions exclude tax. Any applicable tax is charged only when you buy plans or credits.

Prices are converted to INR. Credits use your current plan rate.

  • Prices shown are estimates, not final charges. Final billing details will be available in Reports after generation is complete.

API

WEBOT API · Flux LoRA Fill

Generate from your server with your WEBOT account credits.

Use your 120-character WEBOT customer key (a–z, A–Z, 0–9). Send Authorization: Bearer YOUR_KEY. Keys are secrets: call from a server, never from public frontend code. Results come from verified webhooks and remain saved if your stream disconnects.
1. Configure your server
WEBOT_BASE_URL=https://webot.online
WEBOT_API_KEY=<your-server-side-WEBOT-key>

This base URL is resolved from verified domain mappings and your direct creator reseller. Forwarded Host headers are not trusted. New custom reseller domains need DNS, TLS and platform verification before activation.

2. Quote, then generate
MethodEndpointPurpose
POSThttps://webot.online/api/v1/models/creative_c23d8deb740eeaffb88c9e79/quoteValidate input and calculate credits (no deduction).
POSThttps://webot.online/api/v1/models/creative_c23d8deb740eeaffb88c9e79/requestsReserve quoted credits and queue an asynchronous job.
GEThttps://webot.online/api/v1/models/creative_c23d8deb740eeaffb88c9e79/requests/{request_id}/resultRead your saved result: 202 pending, 200 terminal.
GEThttps://webot.online/api/v1/models/creative_c23d8deb740eeaffb88c9e79/requests/{request_id}/eventsAuthenticated SSE: generation / terminal events.

Send JSON {"input":{…}} to quote. Send the same input plus integer quoted_credits to generate, with Authorization: Bearer … and Idempotency-Key. Use a unique 16–128 character key per new job; persist it and reuse the same key and input on any uncertain response. Never retry with a new key: that creates a second chargeable job.

Credits are reserved only after validation and a durable request is saved. A changed quote or insufficient balance returns 409. Credits exclude purchase taxes. The quoted amount is an initial reservation. After generation, the final charge replaces it using confirmed usage. Any verified unused allocation becomes available automatically; additional usage may require more credits. Missing billing stays pending, including for failed jobs.

3. Input example

Save this as input.json. Replace sample prompts, files and media URLs with your own. Schemas do not guarantee provider acceptance of the content.

Supported generation options
  • Choose explicit output dimensions; automatic sizing is unavailable for an accurate quote.
{
    "image_url": "https://example.com/source.png",
    "mask_url": "https://example.com/source.png",
    "image_size": {
        "width": 1024,
        "height": 1024
    },
    "num_images": 1,
    "sync_mode": false,
    "paste_back": true,
    "loras": [],
    "guidance_scale": 30,
    "acceleration": "none",
    "prompt": "",
    "num_inference_steps": 28,
    "resize_to_original": false,
    "enable_safety_checker": true,
    "output_format": "jpeg"
}
4. Language examples
# Save the model's example input as input.json, then replace prompts/media URLs.
# Requires curl and jq. Store NONCE once for this job; reuse it on any retry.
export NONCE="$(openssl rand -hex 16)"
BASE="${WEBOT_BASE_URL%/}"
jq -n --slurpfile input input.json '{input:$input[0]}' > quote-body.json
curl --fail-with-body -sS "$BASE/api/v1/models/creative_c23d8deb740eeaffb88c9e79/quote" \
  -H "Authorization: Bearer $WEBOT_API_KEY" -H 'Content-Type: application/json' \
  --data-binary @quote-body.json > quote.json
CREDITS=$(jq -er '.quote.credits_consumed' quote.json)
jq --argjson credits "$CREDITS" '. + {quoted_credits:$credits}' quote-body.json > request-body.json
curl --fail-with-body -sS "$BASE/api/v1/models/creative_c23d8deb740eeaffb88c9e79/requests" \
  -H "Authorization: Bearer $WEBOT_API_KEY" -H "Idempotency-Key: $NONCE" \
  -H 'Content-Type: application/json' --data-binary @request-body.json > job.json
# Subscribe; after a nonterminal disconnect, reconnect this SAME URL.
curl --fail-with-body -N "$(jq -er '.events_url' job.json)" -H "Authorization: Bearer $WEBOT_API_KEY"
# Read saved output after terminal notification (never call provider status/results).
curl --fail-with-body -sS "$(jq -er '.result_url' job.json)" -H "Authorization: Bearer $WEBOT_API_KEY"
// Node.js 18+. Save your customized input in input.json.
import { readFileSync } from 'node:fs';
import { randomUUID } from 'node:crypto';
const base = process.env.WEBOT_BASE_URL.replace(/\/$/, '');
const key = process.env.WEBOT_API_KEY;
const input = JSON.parse(readFileSync('input.json', 'utf8'));
const nonce = process.env.WEBOT_JOB_NONCE || randomUUID(); // Persist before submission.
async function post(path, body, nonce) {
  const response = await fetch(base + path, {method:'POST', headers:{
    Authorization:`Bearer ${key}`, 'Content-Type':'application/json',
    ...(nonce ? {'Idempotency-Key':nonce} : {})}, body:JSON.stringify(body)});
  const json = await response.json();
  if (!response.ok) throw new Error(JSON.stringify(json));
  return json;
}
const {quote} = await post('/api/v1/models/creative_c23d8deb740eeaffb88c9e79/quote', {input});
const job = await post('/api/v1/models/creative_c23d8deb740eeaffb88c9e79/requests', {input, quoted_credits:quote.credits_consumed}, nonce);
console.log(job); // Stable WEBOT request_id, events_url, result_url.
// Stream saved webhook state. Reconnect ONLY the event stream, not the generation.
while (!job.terminal || job.financial_pending) {
  const stream = await fetch(job.events_url, {headers:{Authorization:`Bearer ${key}`}});
  if (!stream.ok) throw new Error(`Event stream HTTP ${stream.status}`);
  let buffer = '';
  for await (const chunk of stream.body.pipeThrough(new TextDecoderStream())) {
    buffer += chunk;
    let end;
    while ((end = buffer.indexOf('\n\n')) !== -1) {
      const event = buffer.slice(0, end); buffer = buffer.slice(end + 2);
      const data = event.split('\n').find(line => line.startsWith('data: '));
      if (!data) continue;
      const state = JSON.parse(data.slice(6));
      if (state.error && !state.status) throw new Error(JSON.stringify(state.error));
      if (state.terminal && !state.financial_pending) { console.log(state.output ?? state.error); process.exit(0); }
    }
  }
  await new Promise(resolve => setTimeout(resolve, 1500));
}
console.log(job.output ?? job.error);
// Node.js 18+. Save your customized input in input.json.
import { readFileSync } from 'node:fs';
import { randomUUID } from 'node:crypto';
const base = process.env.WEBOT_BASE_URL!.replace(/\/$/, '');
const key = process.env.WEBOT_API_KEY!;
const input = JSON.parse(readFileSync('input.json', 'utf8'));
const nonce = process.env.WEBOT_JOB_NONCE || randomUUID(); // Persist before submission.
async function post(path: string, body: unknown, nonce?: string) {
  const response = await fetch(base + path, {method:'POST', headers:{
    Authorization:`Bearer ${key}`, 'Content-Type':'application/json',
    ...(nonce ? {'Idempotency-Key':nonce} : {})}, body:JSON.stringify(body)});
  const json = await response.json();
  if (!response.ok) throw new Error(JSON.stringify(json));
  return json;
}
const {quote} = await post('/api/v1/models/creative_c23d8deb740eeaffb88c9e79/quote', {input});
const job = await post('/api/v1/models/creative_c23d8deb740eeaffb88c9e79/requests', {input, quoted_credits:quote.credits_consumed}, nonce);
console.log(job); // Stable WEBOT request_id, events_url, result_url.
// Stream saved webhook state. Reconnect ONLY the event stream, not the generation.
while (!job.terminal || job.financial_pending) {
  const stream = await fetch(job.events_url, {headers:{Authorization:`Bearer ${key}`}});
  if (!stream.ok) throw new Error(`Event stream HTTP ${stream.status}`);
  let buffer = '';
  for await (const chunk of stream.body.pipeThrough(new TextDecoderStream())) {
    buffer += chunk;
    let end;
    while ((end = buffer.indexOf('\n\n')) !== -1) {
      const event = buffer.slice(0, end); buffer = buffer.slice(end + 2);
      const data = event.split('\n').find(line => line.startsWith('data: '));
      if (!data) continue;
      const state = JSON.parse(data.slice(6));
      if (state.error && !state.status) throw new Error(JSON.stringify(state.error));
      if (state.terminal && !state.financial_pending) { console.log(state.output ?? state.error); process.exit(0); }
    }
  }
  await new Promise(resolve => setTimeout(resolve, 1500));
}
console.log(job.output ?? job.error);
# Python 3.9+, pip install requests
import json, os, time, uuid, requests
base = os.environ['WEBOT_BASE_URL'].rstrip('/')
headers = {'Authorization': 'Bearer ' + os.environ['WEBOT_API_KEY']}
with open('input.json', encoding='utf-8') as file:
    input_data = json.load(file)
nonce = os.environ.get('WEBOT_JOB_NONCE') or str(uuid.uuid4()) # Persist before submitting.
def post(path, body, extra=None):
    response = requests.post(base + path, headers={**headers, **(extra or {})}, json=body, timeout=180)
    response.raise_for_status()
    return response.json()
quote = post('/api/v1/models/creative_c23d8deb740eeaffb88c9e79/quote', {'input': input_data})['quote']
job = post('/api/v1/models/creative_c23d8deb740eeaffb88c9e79/requests', {'input': input_data, 'quoted_credits': quote['credits_consumed']}, {'Idempotency-Key': nonce})
state = job
while not state['terminal'] or state.get('financial_pending', False):
    # Reconnect while nonterminal; this reads WEBOT's database, never a provider status API.
    with requests.get(job['events_url'], headers=headers, stream=True, timeout=(10, 40)) as stream:
        stream.raise_for_status()
        for line in stream.iter_lines(decode_unicode=True):
            if line and line.startswith('data: '):
                state = json.loads(line[6:])
                if 'status' not in state: raise RuntimeError(state)
                if state['terminal'] and not state.get('financial_pending', False): break
    if not state['terminal'] or state.get('financial_pending', False): time.sleep(1.5)
print(state['output'] if state['status'] == 'completed' else state['error'])
<?php // PHP 8.1+ with cURL
$base = rtrim(getenv('WEBOT_BASE_URL'), '/');
$input = json_decode(file_get_contents('input.json'), false, 64, JSON_THROW_ON_ERROR);
$nonce = getenv('WEBOT_JOB_NONCE') ?: bin2hex(random_bytes(16)); // Persist this before submission.
function post(string $path, array $body, ?string $nonce = null): array {
    global $base;
    $headers = ['Authorization: Bearer '.getenv('WEBOT_API_KEY'), 'Content-Type: application/json'];
    if ($nonce) $headers[] = 'Idempotency-Key: '.$nonce;
    $ch = curl_init($base.$path);
    curl_setopt_array($ch, [CURLOPT_RETURNTRANSFER=>true, CURLOPT_POST=>true,
        CURLOPT_TIMEOUT=>180, CURLOPT_HTTPHEADER=>$headers,
        CURLOPT_POSTFIELDS=>json_encode($body, JSON_THROW_ON_ERROR)]);
    $raw = curl_exec($ch); $status = curl_getinfo($ch, CURLINFO_HTTP_CODE); curl_close($ch);
    if ($raw === false || $status < 200 || $status >= 300) throw new RuntimeException('WEBOT HTTP '.$status);
    return json_decode($raw, true, 64, JSON_THROW_ON_ERROR);
}
$quote = post('/api/v1/models/creative_c23d8deb740eeaffb88c9e79/quote', ['input'=>$input])['quote'];
$job = post('/api/v1/models/creative_c23d8deb740eeaffb88c9e79/requests', ['input'=>$input, 'quoted_credits'=>$quote['credits_consumed']], $nonce);
echo json_encode($job, JSON_PRETTY_PRINT); // Connect to events_url with the same Bearer header.
// Go 1.20+; save as main.go.
package main
import ("bytes"; "encoding/json"; "fmt"; "io"; "net/http"; "os"; "strings"; "time"; "crypto/rand"; "encoding/hex")
func main() {
    base := strings.TrimRight(os.Getenv("WEBOT_BASE_URL"), "/")
    raw, err := os.ReadFile("input.json"); if err != nil { panic(err) }
    nonce := os.Getenv("WEBOT_JOB_NONCE")
    if nonce == "" { b := make([]byte,16); if _,err:=rand.Read(b);err!=nil {panic(err)}; nonce=hex.EncodeToString(b) }
    // Persist nonce before the submission; reuse on ambiguous responses.
    client := &http.Client{Timeout:180*time.Second}
    post := func(path string, body any, id string) map[string]any {
        data, err := json.Marshal(body); if err != nil {panic(err)}
        req, err := http.NewRequest("POST",base+path,bytes.NewReader(data)); if err!=nil {panic(err)}
        req.Header.Set("Authorization","Bearer "+os.Getenv("WEBOT_API_KEY")); req.Header.Set("Content-Type","application/json")
        if id!="" {req.Header.Set("Idempotency-Key",id)}
        res,err:=client.Do(req); if err!=nil {panic(err)}; defer res.Body.Close()
        data,err=io.ReadAll(res.Body); if err!=nil {panic(err)}
        if res.StatusCode<200||res.StatusCode>=300 {panic(string(data))}
        var result map[string]any; if err=json.Unmarshal(data,&result);err!=nil {panic(err)}; return result
    }
    input:=json.RawMessage(raw)
    quote:=post("/api/v1/models/creative_c23d8deb740eeaffb88c9e79/quote",map[string]any{"input":input},"")["quote"].(map[string]any)
    job:=post("/api/v1/models/creative_c23d8deb740eeaffb88c9e79/requests",map[string]any{"input":input,"quoted_credits":quote["credits_consumed"]},nonce)
    fmt.Println(job) // Stream events_url with the same Authorization header.
}
// Java 11+, Jackson databind dependency; class Main in Main.java.
import java.net.URI;
import java.net.http.*;
import java.nio.file.*;
import java.time.Duration;
import java.util.UUID;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.node.ObjectNode;
public class Main {
  static final ObjectMapper json = new ObjectMapper();
  static final HttpClient client = HttpClient.newHttpClient();
  static final String base = System.getenv("WEBOT_BASE_URL").replaceAll("/$", "");
  static JsonNode post(String path, JsonNode body, String nonce) throws Exception {
    var b = HttpRequest.newBuilder(URI.create(base+path)).timeout(Duration.ofSeconds(180))
      .header("Authorization","Bearer "+System.getenv("WEBOT_API_KEY")).header("Content-Type","application/json")
      .POST(HttpRequest.BodyPublishers.ofString(json.writeValueAsString(body)));
    if(nonce!=null)b.header("Idempotency-Key",nonce);
    var r=client.send(b.build(),HttpResponse.BodyHandlers.ofString());
    if(r.statusCode()<200||r.statusCode()>=300)throw new IllegalStateException(r.body());
    return json.readTree(r.body());
  }
  public static void main(String[] args) throws Exception {
    var input=json.readTree(Files.readString(Path.of("input.json")));
    ObjectNode body=json.createObjectNode();body.set("input",input);
    var quote=post("/api/v1/models/creative_c23d8deb740eeaffb88c9e79/quote",body,null).get("quote");
    body.put("quoted_credits",quote.get("credits_consumed").asInt());
    String nonce=System.getenv("WEBOT_JOB_NONCE");if(nonce==null)nonce=UUID.randomUUID().toString(); // Persist before POST.
    var job=post("/api/v1/models/creative_c23d8deb740eeaffb88c9e79/requests",body,nonce);System.out.println(job);
    // Subscribe to job.events_url with Authorization; use BodyHandlers.ofLines().
  }
}
// .NET 8 console app, top-level statements.
using System.Net.Http;
using System.Text;
using System.Text.Json.Nodes;
var client = new HttpClient { Timeout = TimeSpan.FromSeconds(180) };
var root = Environment.GetEnvironmentVariable("WEBOT_BASE_URL")!.TrimEnd('/');
var key = Environment.GetEnvironmentVariable("WEBOT_API_KEY");
async Task<JsonNode> Post(string path, JsonNode body, string? nonce = null) {
    using var req = new HttpRequestMessage(HttpMethod.Post, root + path);
    req.Headers.Add("Authorization", "Bearer " + key);
    if (nonce != null) req.Headers.Add("Idempotency-Key", nonce);
    req.Content = new StringContent(body.ToJsonString(), Encoding.UTF8, "application/json");
    using var res = await client.SendAsync(req);
    var raw = await res.Content.ReadAsStringAsync();res.EnsureSuccessStatusCode();
    return JsonNode.Parse(raw)!;
}
var input = JsonNode.Parse(await File.ReadAllTextAsync("input.json"));
var body = new JsonObject { ["input"] = input };
var quote = await Post("/api/v1/models/creative_c23d8deb740eeaffb88c9e79/quote", body);
body["quoted_credits"] = quote["quote"]!["credits_consumed"]!.GetValue<int>();
var nonce = Environment.GetEnvironmentVariable("WEBOT_JOB_NONCE") ?? Guid.NewGuid().ToString(); // Persist before submitting.
var job = await Post("/api/v1/models/creative_c23d8deb740eeaffb88c9e79/requests", body, nonce);
Console.WriteLine(job); // Subscribe to events_url with the same Bearer header and ResponseHeadersRead.
# Ruby 3+, standard library only.
require 'net/http'
require 'json'
require 'securerandom'
base = ENV.fetch('WEBOT_BASE_URL').sub(%r{/$}, '')
post = lambda do |path, body, nonce = nil|
  uri = URI(base + path)
  req = Net::HTTP::Post.new(uri)
  req['Authorization'] = 'Bearer ' + ENV.fetch('WEBOT_API_KEY')
  req['Content-Type'] = 'application/json'
  req['Idempotency-Key'] = nonce if nonce
  req.body = JSON.generate(body)
  res = Net::HTTP.start(uri.host, uri.port, use_ssl: true, read_timeout: 180) { |http| http.request(req) }
  raise res.body unless res.is_a?(Net::HTTPSuccess)
  JSON.parse(res.body)
end
input = JSON.parse(File.read('input.json'))
quote = post.call('/api/v1/models/creative_c23d8deb740eeaffb88c9e79/quote', {'input' => input})['quote']
nonce = ENV['WEBOT_JOB_NONCE'] || SecureRandom.uuid # Persist this before submission.
job = post.call('/api/v1/models/creative_c23d8deb740eeaffb88c9e79/requests', {'input' => input, 'quoted_credits' => quote['credits_consumed']}, nonce)
puts JSON.pretty_generate(job) # Subscribe to events_url with the same Authorization header.
// Swift 5.9 server-side/CLI only. Do not embed customer keys in shipped apps.
import Foundation
#if canImport(FoundationNetworking)
import FoundationNetworking
#endif
@main struct Main {
 static func main() async throws {
  let env=ProcessInfo.processInfo.environment
  let base=env["WEBOT_BASE_URL"]!.trimmingCharacters(in: CharacterSet(charactersIn:"/"))
  let input=try JSONSerialization.jsonObject(with: Data(contentsOf:URL(fileURLWithPath:"input.json")))
  func post(_ path:String,_ body:[String:Any],_ nonce:String?=nil) async throws -> [String:Any] {
   var req=URLRequest(url:URL(string:base+path)!);req.httpMethod="POST";req.timeoutInterval=180
   req.setValue("Bearer "+env["WEBOT_API_KEY"]!,forHTTPHeaderField:"Authorization")
   req.setValue("application/json",forHTTPHeaderField:"Content-Type")
   if let nonce {req.setValue(nonce,forHTTPHeaderField:"Idempotency-Key")}
   req.httpBody=try JSONSerialization.data(withJSONObject:body)
   let (data,res)=try await URLSession.shared.data(for:req)
   guard let http=res as? HTTPURLResponse,(200..<300).contains(http.statusCode) else {throw NSError(domain:"WEBOT",code:1)}
   return try JSONSerialization.jsonObject(with:data) as! [String:Any]
  }
  let quote=try await post("/api/v1/models/creative_c23d8deb740eeaffb88c9e79/quote",["input":input])["quote"] as! [String:Any]
  let nonce=env["WEBOT_JOB_NONCE"] ?? UUID().uuidString // Persist before submission.
  let job=try await post("/api/v1/models/creative_c23d8deb740eeaffb88c9e79/requests",["input":input,"quoted_credits":quote["credits_consumed"]!],nonce)
  print(job) // Subscribe to events_url with the same Authorization header.
 }
}
// Server-side Kotlin/JVM 17+, Gradle dependencies: OkHttp 4.12, org.json 20240303.
import okhttp3.*
import okhttp3.MediaType.Companion.toMediaType
import okhttp3.RequestBody.Companion.toRequestBody
import org.json.JSONObject
import java.io.File
import java.util.UUID
import java.util.concurrent.TimeUnit
fun main() {
 val base=System.getenv("WEBOT_BASE_URL").trimEnd('/')
 val client=OkHttpClient.Builder().readTimeout(180,TimeUnit.SECONDS).build()
 fun post(path:String,body:JSONObject,nonce:String?=null):JSONObject {
  val b=Request.Builder().url(base+path).header("Authorization","Bearer "+System.getenv("WEBOT_API_KEY"))
   .post(body.toString().toRequestBody("application/json".toMediaType()))
  if(nonce!=null)b.header("Idempotency-Key",nonce)
  return client.newCall(b.build()).execute().use {res ->
   val raw=res.body!!.string();check(res.isSuccessful){raw};JSONObject(raw)
  }
 }
 val body=JSONObject().put("input",JSONObject(File("input.json").readText()))
 val quote=post("/api/v1/models/creative_c23d8deb740eeaffb88c9e79/quote",body).getJSONObject("quote")
 body.put("quoted_credits",quote.getInt("credits_consumed"))
 val nonce=System.getenv("WEBOT_JOB_NONCE") ?: UUID.randomUUID().toString() // Persist before submission.
 val job=post("/api/v1/models/creative_c23d8deb740eeaffb88c9e79/requests",body,nonce)
 println(job) // Subscribe to events_url with the same Authorization header.
}
5. Receive all results

The response includes a stable WEBOT request_id, events_url and result_url. Subscribe with a Bearer-authenticated HTTP stream. Nonterminal streams end after 25 seconds; reconnect to the same URL after at least 1.5 seconds. Current saved state is replayed immediately, including completion that happened while disconnected. A terminal event contains the result envelope. The JSON terminal flag describes generation completion. Keep reconnecting while financial_pending is true; stop after the terminal event confirms financial settlement. Never poll provider status/results. Native browser EventSource cannot send a Bearer header; keep the key on your server.

Completed output contains the full model result, including every generated media/document item, not just the first URL. Failed output is null with error and refund_state. Results are strictly limited to the key owner, including on reseller domains. Model-independent aliases: /api/v1/requests/{request_id}/result and /events. Revoking a key blocks subsequent reads and streams; saved results remain accessible with another valid key of the same account.

6. Schemas and parameter defaults

Required fields are marked with *. Required text must contain non-whitespace content. Defaults apply when an optional parameter is omitted; null, false, 0 and an empty array are distinct values. “No documented default” means WEBOT does not invent one. Examples are sample inputs, not defaults. WEBOT generation constraints can require an explicit value even when the provider publishes an automatic default.

Input schema · fields, constraints and defaults
ParameterTypeRequiredDefault when omittedDescription / constraints
num_imagesintegerNo1The number of images to generate. This is always set to 1 for streaming output.
minimum: 1 · maximum: 4
sync_modebooleanNofalseIf `True`, the media will be returned as a data URI and the output data won't be available in the request history.
paste_backbooleanNotrueSpecifies whether to paste-back the original image onto to the non-inpainted areas of the output
lorasarrayNo[] The LoRAs to use for the image generation. You can use any number of LoRAs and they will be merged together to generate the final image.
loras[].pathstringYes *No documented defaultURL or the path to the LoRA weights.
loras[].scalenumberNo1 The scale of the LoRA weight. This is used to scale the LoRA weight before merging it with the base model.
minimum: 0 · maximum: 4
seedinteger | nullNoNo documented default The same seed and the same prompt given to the same version of the model will output the same image every time.
image_sizeobject | stringNo"square_hd"The size of the generated image.
image_size.variant0.heightintegerNo512The height of the generated image.
maximum: 14142 · exclusiveMinimum: 0
image_size.variant0.widthintegerNo512The width of the generated image.
maximum: 14142 · exclusiveMinimum: 0
image_urlstringYes *No documented defaultURL of image to use for fill operation
guidance_scalenumberNo30 The CFG (Classifier Free Guidance) scale is a measure of how close you want the model to stick to your prompt when looking for a related image to show you.
minimum: 28 · maximum: 35
accelerationstringNo"none"Acceleration level for image generation. 'regular' balances speed and quality.
enum: ["none","regular"]
promptstringNo""The prompt to generate an image from.
num_inference_stepsintegerNo28The number of inference steps to perform.
minimum: 1 · maximum: 50
fill_imageobject | nullNoNo documented defaultUse an image fill input to fill in particular images into the masked area.
fill_image.variant0.use_promptbooleanNofalseWhether to use the prompt as well in the generation, along with the redux image.
fill_image.variant0.in_context_fillbooleanNofalseUses the provided fill image in context with the base image to fill in more faithfully. Will increase price.
fill_image.variant0.fill_image_urlarray | string | nullNoNo documented defaultURLs of images to be filled into the masked area.
resize_to_originalbooleanNofalseResizes the image back to the original size. Use when you wish to preserve the exact image size as the originally provided image.
enable_safety_checkerbooleanNotrueIf set to true, the safety checker will be enabled. Disabling it requires account authorization; unauthorized requests are always checked, and images flagged as unsafe are returned as black images.
mask_urlstringYes *No documented default The mask to area to Inpaint in.
output_formatstringNo"jpeg"The format of the generated image.
enum: ["jpeg","png"]
{
    "x-webot-order-properties": [
        "prompt",
        "image_size",
        "num_inference_steps",
        "seed",
        "loras",
        "guidance_scale",
        "sync_mode",
        "num_images",
        "enable_safety_checker",
        "output_format",
        "acceleration",
        "image_url",
        "mask_url",
        "paste_back",
        "fill_image",
        "resize_to_original"
    ],
    "required": [
        "image_url",
        "mask_url"
    ],
    "type": "object",
    "title": "FillInput",
    "properties": {
        "num_images": {
            "minimum": 1,
            "description": "The number of images to generate. This is always set to 1 for streaming output.",
            "type": "integer",
            "maximum": 4,
            "title": "Num Images",
            "default": 1
        },
        "sync_mode": {
            "description": "If `True`, the media will be returned as a data URI and the output data won't be available in the request history.",
            "type": "boolean",
            "title": "Sync Mode",
            "default": false
        },
        "paste_back": {
            "description": "Specifies whether to paste-back the original image onto to the non-inpainted areas of the output",
            "type": "boolean",
            "title": "Paste Back",
            "default": true
        },
        "loras": {
            "examples": [],
            "default": [],
            "description": "\n            The LoRAs to use for the image generation. You can use any number of LoRAs\n            and they will be merged together to generate the final image.\n        ",
            "type": "array",
            "items": {
                "x-webot-order-properties": [
                    "path",
                    "scale"
                ],
                "required": [
                    "path"
                ],
                "type": "object",
                "title": "LoraWeight",
                "properties": {
                    "path": {
                        "description": "URL or the path to the LoRA weights.",
                        "type": "string",
                        "title": "Path"
                    },
                    "scale": {
                        "minimum": 0,
                        "description": "\n            The scale of the LoRA weight. This is used to scale the LoRA weight\n            before merging it with the base model.\n        ",
                        "type": "number",
                        "maximum": 4,
                        "title": "Scale",
                        "default": 1
                    }
                }
            },
            "title": "Loras"
        },
        "seed": {
            "anyOf": [
                {
                    "type": "integer"
                },
                {
                    "type": "null"
                }
            ],
            "description": "\n            The same seed and the same prompt given to the same version of the model\n            will output the same image every time.\n        ",
            "title": "Seed"
        },
        "image_size": {
            "anyOf": [
                {
                    "x-webot-order-properties": [
                        "width",
                        "height"
                    ],
                    "type": "object",
                    "title": "ImageSize",
                    "properties": {
                        "height": {
                            "default": 512,
                            "description": "The height of the generated image.",
                            "type": "integer",
                            "maximum": 14142,
                            "title": "Height",
                            "exclusiveMinimum": 0
                        },
                        "width": {
                            "default": 512,
                            "description": "The width of the generated image.",
                            "type": "integer",
                            "maximum": 14142,
                            "title": "Width",
                            "exclusiveMinimum": 0
                        }
                    }
                },
                {
                    "type": "string",
                    "enum": [
                        "square_hd",
                        "square",
                        "portrait_4_3",
                        "portrait_16_9",
                        "landscape_4_3",
                        "landscape_16_9"
                    ]
                }
            ],
            "description": "The size of the generated image.",
            "title": "Image Size",
            "default": "square_hd"
        },
        "image_url": {
            "description": "URL of image to use for fill operation",
            "type": "string",
            "examples": [
                "https://storage.googleapis.com/falserverless/flux-lora/example-images/knight.jpeg"
            ],
            "title": "Image Url"
        },
        "guidance_scale": {
            "minimum": 28,
            "description": "\n            The CFG (Classifier Free Guidance) scale is a measure of how close you want\n            the model to stick to your prompt when looking for a related image to show you.\n        ",
            "type": "number",
            "maximum": 35,
            "title": "Guidance scale (CFG)",
            "default": 30
        },
        "acceleration": {
            "description": "Acceleration level for image generation. 'regular' balances speed and quality.",
            "type": "string",
            "title": "Acceleration",
            "enum": [
                "none",
                "regular"
            ],
            "default": "none"
        },
        "prompt": {
            "description": "The prompt to generate an image from.",
            "type": "string",
            "examples": [
                "A knight in shining armour holding a greatshield with 'FAL' on it"
            ],
            "title": "Prompt",
            "default": ""
        },
        "num_inference_steps": {
            "minimum": 1,
            "description": "The number of inference steps to perform.",
            "type": "integer",
            "maximum": 50,
            "title": "Num Inference Steps",
            "default": 28
        },
        "fill_image": {
            "anyOf": [
                {
                    "x-webot-order-properties": [
                        "fill_image_url",
                        "in_context_fill",
                        "use_prompt"
                    ],
                    "type": "object",
                    "title": "ImageFillInput",
                    "properties": {
                        "use_prompt": {
                            "description": "Whether to use the prompt as well in the generation, along with the redux image.",
                            "type": "boolean",
                            "title": "Use Prompt",
                            "default": false
                        },
                        "in_context_fill": {
                            "description": "Uses the provided fill image in context with the base image to fill in more faithfully. Will increase price.",
                            "type": "boolean",
                            "title": "In Context Fill",
                            "default": false
                        },
                        "fill_image_url": {
                            "anyOf": [
                                {
                                    "type": "array",
                                    "items": {
                                        "type": "string"
                                    }
                                },
                                {
                                    "type": "string"
                                },
                                {
                                    "type": "null"
                                }
                            ],
                            "description": "URLs of images to be filled into the masked area.",
                            "title": "Fill Image Url"
                        }
                    }
                },
                {
                    "type": "null"
                }
            ],
            "description": "Use an image fill input to fill in particular images into the masked area."
        },
        "resize_to_original": {
            "description": "Resizes the image back to the original size. Use when you wish to preserve the exact image size as the originally provided image.",
            "type": "boolean",
            "title": "Resize To Original",
            "default": false
        },
        "enable_safety_checker": {
            "description": "If set to true, the safety checker will be enabled. Disabling it requires account authorization; unauthorized requests are always checked, and images flagged as unsafe are returned as black images.",
            "type": "boolean",
            "title": "Enable Safety Checker",
            "default": true
        },
        "mask_url": {
            "description": "\n            The mask to area to Inpaint in.\n        ",
            "type": "string",
            "examples": [
                "https://storage.googleapis.com/falserverless/flux-lora/example-images/mask_knight.jpeg"
            ],
            "title": "Mask Url"
        },
        "output_format": {
            "description": "The format of the generated image.",
            "type": "string",
            "title": "Output Format",
            "enum": [
                "jpeg",
                "png"
            ],
            "default": "jpeg"
        }
    }
}
Output (inside result.output) schema · fields, constraints and defaults
ParameterTypeRequiredDefault when omittedDescription / constraints
has_nsfw_conceptsarrayYes *No documented defaultWhether the generated images contain NSFW concepts.
imagesarrayYes *No documented defaultThe generated image files info.
images[].heightintegerYes *No documented default
images[].widthintegerYes *No documented default
images[].urlstringYes *No documented default
images[].content_typestring | nullNo"image/jpeg"
seedintegerYes *No documented default Seed of the generated Image. It will be the same value of the one passed in the input or the randomly generated that was used in case none was passed.
promptstringYes *No documented defaultThe prompt used for generating the image.
timingsobjectYes *No documented default
{
    "x-webot-order-properties": [
        "images",
        "timings",
        "seed",
        "has_nsfw_concepts",
        "prompt"
    ],
    "required": [
        "images",
        "timings",
        "seed",
        "has_nsfw_concepts",
        "prompt"
    ],
    "type": "object",
    "title": "Output",
    "properties": {
        "has_nsfw_concepts": {
            "description": "Whether the generated images contain NSFW concepts.",
            "type": "array",
            "items": {
                "type": "boolean"
            },
            "title": "Has Nsfw Concepts"
        },
        "images": {
            "description": "The generated image files info.",
            "type": "array",
            "items": {
                "x-webot-order-properties": [
                    "url",
                    "width",
                    "height",
                    "content_type"
                ],
                "required": [
                    "url",
                    "width",
                    "height"
                ],
                "type": "object",
                "title": "Image",
                "properties": {
                    "height": {
                        "type": "integer",
                        "title": "Height"
                    },
                    "width": {
                        "type": "integer",
                        "title": "Width"
                    },
                    "url": {
                        "type": "string",
                        "title": "Url"
                    },
                    "content_type": {
                        "anyOf": [
                            {
                                "type": "string"
                            },
                            {
                                "type": "null"
                            }
                        ],
                        "default": "image/jpeg",
                        "title": "Content Type"
                    }
                }
            },
            "title": "Images"
        },
        "seed": {
            "description": "\n            Seed of the generated Image. It will be the same value of the one passed in the\n            input or the randomly generated that was used in case none was passed.\n        ",
            "type": "integer",
            "title": "Seed"
        },
        "prompt": {
            "description": "The prompt used for generating the image.",
            "type": "string",
            "title": "Prompt"
        },
        "timings": {
            "additionalProperties": {
                "type": "number"
            },
            "type": "object",
            "title": "Timings"
        }
    }
}
Errors and limits

401 invalid/expired/revoked key · 403 key scope or domain mismatch · 404 unavailable model or unowned request · 409 quote changed, balance, concurrency or idempotency conflict · 413 JSON exceeds 2 MB · 415 wrong content type · 422 invalid fields/media · 429 rate limit · 503 temporary/ambiguous submission. Respect Retry-After. Current limits per account: 12 quotes/submissions, 120 result reads and 8 stream connections per minute. One submission preparation at a time per account. Do not automatically regenerate failed jobs.

Your requests

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How to use Flux LoRA Fill

Use an existing picture as the starting material. This model changes or processes it according to its specific task and the controls shown here.

Required inputs

  • Image Url: The input picture. Use a clear image in one of the accepted formats. If the form offers upload, select a file there; if it asks for a URL, use an accessible HTTPS file link.
  • Mask Url: A selection map showing which area is affected. White may mean “change this area” or “keep this area” depending on the model. Follow this model’s documentation below; do not assume every mask works the same way.

Workflow

  1. Prepare your source material and fill the required inputs above. Review the supported settings for this model.
  2. Sign in to calculate the credit estimate. Review the estimate before choosing Generate.
  3. Keep this model page open while the request runs. Completed results arrive in the result area; use the available player or download controls to review the output.

When to use this workflow

  • Work from a photo or illustration you already have.
  • Apply this model’s documented image transformation.

Key settings

Image Url
The input picture. Use a clear image in one of the accepted formats. If the form offers upload, select a file there; if it asks for a URL, use an accessible HTTPS file link.
Mask Url
A selection map showing which area is affected. White may mean “change this area” or “keep this area” depending on the model. Follow this model’s documentation below; do not assume every mask works the same way.
Prompt
Your instructions to the model. Say what you want, include the important details and avoid contradictory directions. For a video, describe the action as well as the scene.
Image Size
The output dimensions, usually width and height in pixels or a named size. Pixels are tiny dots that form a picture. More pixels make a larger image; they do not automatically make it more accurate. Choose a size suited to where you will use it. Supported choices: "square_hd", "square", "portrait_4_3", "portrait_16_9", "landscape_4_3", "landscape_16_9"
Height
The vertical size: how tall the output is, usually in pixels. Width and height together determine the shape and total pixel count. Maximum: 14142. Greater than: 0
Width
The horizontal size: how wide the output is, usually in pixels. Changing it can also change the shape or crop. Respect the allowed increments as well as the minimum and maximum. Maximum: 14142. Greater than: 0

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