GET

/v1/schemas/fal/image/fal-ai/fast-lcm-diffusion/inpainting

kind inputactivity imagehash d2c563bf…extracted Oct 29, 2026version currentsource upstream spec ↗
fieldrecorded source
schemaSource linked above.

upstream-spec

Source trace
1a3a76e2639750aeb5a1b414205865594c617fb472b07e8abb1bc5097725ed5f
{
  "fetchedAt": 1793250001,
  "extractorVersion": "1",
  "verifiedAt": null
}

Request body

16 properties · 3 required · 1 $defs
propertytypedescriptionconstraints
image_url*stringThe URL of the image to use as a starting point for the generation.
prompt*stringThe prompt to use for generating the image. Be as descriptive as possible for best results.
mask_url*stringThe URL of the mask to use for inpainting.
sync_modebooleanIf `True`, the media will be returned as a data URI and the output data won't be available in the request history.default: true
formatenumThe format of the generated image.jpeg | png · default: "jpeg"
strengthnumberdetermines how much the generated image resembles the initial image0.01 ≤ n ≤ 1 · default: 0.95
seedinteger The same seed and the same prompt given to the same version of Stable Diffusion will output the same image every time. nullable
enable_prompt_expansionbooleanIf set to true, the prompt will be expanded with additional prompts.default: false
safety_checker_versionenumThe version of the safety checker to use. v1 is the default CompVis safety checker. v2 uses a custom ViT model.v1 | v2 · default: "v1"
image_sizeImageSize | enumThe size of the generated image.default: "square_hd"
num_imagesintegerThe number of images to generate.1 ≤ n ≤ 8 · default: 1
guidance_scalenumberThe 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.0 ≤ n ≤ 20 · default: 1.5
enable_safety_checkerbooleanIf set to true, the safety checker will be enabled.default: true
negative_promptstringThe 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: ""
request_idstringAn id bound to a request, can be used with response to identify the request itself.default: ""
num_inference_stepsintegerThe number of inference steps to perform.1 ≤ n ≤ 32 · default: 6

Types

1 $defs

ImageSizeobject

widthintegerThe width of the generated image.0 < n ≤ 14142 · default: 512
heightintegerThe height of the generated image.0 < n ≤ 14142 · default: 512

Validate a payload

before you spend tokens
shell
$ curl -X POST https://modelschemas.com/v1/validate \
    -d '{"provider":"fal","endpointId":"fal-ai/fast-lcm-diffusion/inpainting","payload":{…}}'
→ {"valid": false, "errors": [{"path": "#", "keyword": "required", …}]}