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The client provides a convenient way to interact with the model API.
npm install --save @fal-ai/clientThe @fal-ai/serverless-client package has been deprecated in favor of @fal-ai/client. Install the new package and update your imports — see client setup.
Set FAL_KEY as an environment variable in your runtime.
export FAL_KEY="YOUR_API_KEY"The client API handles the API submit protocol. It will handle the request status updates and return the result when the request is completed.
import { fal } from "@fal-ai/client";
const result = await fal.subscribe("fal-ai/creative-upscaler", {
input: {
image_url: "https://storage.googleapis.com/falserverless/model_tests/upscale/owl.png"
},
logs: true,
onQueueUpdate: (update) => {
if (update.status === "IN_PROGRESS") {
update.logs.map((log) => log.message).forEach(console.log);
}
},
});
console.log(result.data);
console.log(result.requestId);The API uses an API Key for authentication. It is recommended you set the FAL_KEY environment variable in your runtime when possible.
import { fal } from "@fal-ai/client";
fal.config({
credentials: "YOUR_FAL_KEY"
});When running code on the client-side (e.g. in a browser, mobile app or GUI applications), make sure to not expose your FAL_KEY. Instead, use a server-side proxy to make requests to the API. For more information, check out our server-side integration guide.
The client API provides a convenient way to submit requests to the model.
import { fal } from "@fal-ai/client";
const { request_id } = await fal.queue.submit("fal-ai/creative-upscaler", {
input: {
image_url: "https://storage.googleapis.com/falserverless/model_tests/upscale/owl.png"
},
webhookUrl: "https://optional.webhook.url/for/results",
});You can fetch the status of a request to check if it is completed or still in progress.
import { fal } from "@fal-ai/client";
const status = await fal.queue.status("fal-ai/creative-upscaler", {
requestId: "764cabcf-b745-4b3e-ae38-1200304cf45b",
logs: true,
});Once the request is completed, you can fetch the result. See the Output Schema for the expected result format.
import { fal } from "@fal-ai/client";
const result = await fal.queue.result("fal-ai/creative-upscaler", {
requestId: "764cabcf-b745-4b3e-ae38-1200304cf45b"
});
console.log(result.data);
console.log(result.requestId);Some attributes in the API accept file URLs as input. Whenever that's the case you can pass your own URL or a Base64 data URI.
You can pass a Base64 data URI as a file input. The API will handle the file decoding for you. Keep in mind that for large files, this alternative although convenient can impact the request performance.
You can also pass your own URLs as long as they are publicly accessible. Be aware that some hosts might block cross-site requests, rate-limit, or consider the request as a bot.
We provide a convenient file storage that allows you to upload files and use them in your requests. You can upload files using the client API and use the returned URL in your requests.
import { fal } from "@fal-ai/client";
const file = new File(["Hello, World!"], "hello.txt", { type: "text/plain" });
const url = await fal.storage.upload(file);The client will auto-upload the file for you if you pass a binary object (e.g. File, Data).
Read more about file handling in our file upload guide.
model_type ModelTypeEnumThe type of model to use for the upscaling. Default is SD_1_5 Default value: "SD_1_5"
Possible enum values: SD_1_5, SDXL
image_url string* requiredThe image to upscale.
prompt stringThe prompt to use for generating the image. Be as descriptive as possible for best results. If no prompt is provide BLIP2 will be used to generate a prompt.
scale floatThe scale of the output image. The higher the scale, the bigger the output image will be. Default value: 2
creativity floatHow much the output can deviate from the original Default value: 0.5
detail floatHow much detail to add Default value: 1
shape_preservation floatHow much to preserve the shape of the original image Default value: 0.25
prompt_suffix stringThe suffix to add to the prompt. This is useful to add a common ending to all prompts such as 'high quality' etc or embedding tokens. Default value: " high quality, highly detailed, high resolution, sharp"
negative_prompt stringThe negative prompt to use.Use it to address details that you don't want
in the image. This could be colors, objects, scenery and even the small details
(e.g. moustache, blurry, low resolution). Default value: "blurry, low resolution, bad, ugly, low quality, pixelated, interpolated, compression artifacts, noisey, grainy"
seed integerThe same seed and the same prompt given to the same version of Stable Diffusion will output the same image every time.
guidance_scale floatThe 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. Default value: 7.5
num_inference_steps integerThe number of inference steps to use for generating the image. The more steps
the better the image will be but it will also take longer to generate. Default value: 20
enable_safety_checks booleanIf set to true, the resulting image will be checked whether it includes any
potentially unsafe content. If it does, it will be replaced with a black
image. Default value: true
skip_ccsr booleanIf set to true, the image will not be processed by the CCSR model before being processed by the creativity model.
override_size_limits booleanAllow for large uploads that could take a very long time.
base_model_url stringThe URL to the base model to use for the upscaling
additional_lora_url stringThe URL to the additional LORA model to use for the upscaling. Default is None
additional_lora_scale floatThe scale of the additional LORA model to use for the upscaling. Default is 1.0 Default value: 1
additional_embedding_url stringThe URL to the additional embeddings to use for the upscaling. Default is None
{
"model_type": "SD_1_5",
"image_url": "https://storage.googleapis.com/falserverless/model_tests/upscale/owl.png",
"scale": 2,
"creativity": 0.5,
"detail": 1,
"shape_preservation": 0.25,
"prompt_suffix": " high quality, highly detailed, high resolution, sharp",
"negative_prompt": "blurry, low resolution, bad, ugly, low quality, pixelated, interpolated, compression artifacts, noisey, grainy",
"seed": 42,
"guidance_scale": 7.5,
"num_inference_steps": 20,
"enable_safety_checks": true,
"additional_lora_scale": 1
}The generated image file info.
seed integer* requiredSeed 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.
{
"image": {
"url": "",
"content_type": "image/png",
"file_name": "z9RV14K95DvU.png",
"file_size": 4404019,
"width": 1024,
"height": 1024
}
}url string* requiredThe URL where the file can be downloaded from.
content_type stringThe mime type of the file.
file_name stringThe name of the file. It will be auto-generated if not provided.
file_size integerThe size of the file in bytes.
width integerThe width of the image in pixels.
height integerThe height of the image in pixels.