const res = await fetch('/api/native/convert-http', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
    options: {
      from_formats: ['docx', 'pptx', 'html', 'image', 'pdf', 'asciidoc', 'md', 'xlsx'],
      to_formats: ['md'],
      image_export_mode: 'placeholder',
      table_mode: 'fast',
      abort_on_error: false,
      return_as_file: false,
      do_table_structure: true,
      include_images: false
    },
    http_sources: [{ url: 'https://arxiv.org/pdf/2206.01062' }]
  })
});