curl --request POST \
  --url https://api.example.com/api/v1/markdown/convert \
  --header 'Content-Type: multipart/form-data' \
  --form 'file=<string>' \
  --form 'url=<string>' \
  --form 'url_headers=<string>' \
  --form use_llm=false

{
  "content_length": 1234,
  "content_type": "application/pdf",
  "filename": "document.pdf",
  "markdown": "# Document Title\n\nThis is the content...",
  "success": true
}