curl --request POST \
  --url https://api.iotools.cloud/v1/tool/hsts-preload-header-generator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "maxAge": "31536000",
  "includeSubDomains": "true",
  "preload": "true"
}
'

{
  "tool": "hsts-preload-header-generator",
  "tool_version": "1.0.1",
  "outputs": {
    "headerOutput": "Strict-Transport-Security: max-age=31536000; includeSubDomains; preload",
    "eligibility": "✓ Eligible for hstspreload.org submission.\n\n✓ max-age is at least 1 year (31536000 seconds).\n✓ includeSubDomains directive is present.\n✓ preload directive is present.\n\nAlso required (cannot be checked here): a valid HTTPS certificate, the header served over HTTPS, and all HTTP traffic redirected to HTTPS on the same host."
  },
  "credits_used": 3,
  "credits_remaining": null
}