curl --request POST \
  --url https://api.iotools.cloud/v1/tool/css-filter-generator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "blur": "2",
  "brightness": "110",
  "contrast": "100",
  "grayscale": "50",
  "hueRotate": "0",
  "invert": "0",
  "opacity": "100",
  "saturate": "100",
  "sepia": "0"
}
'

{
  "tool": "css-filter-generator",
  "tool_version": "1.0.1",
  "outputs": {
    "cssCode": "filter: blur(2px) brightness(110%) grayscale(50%);"
  },
  "credits_used": 3,
  "credits_remaining": null
}