curl -X POST https://api.okrapdf.com/document/my-doc/upload-url \
  -H "Authorization: Bearer okra_YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"url": "https://example.com/report.pdf"}'

{
  "phase": "idle",
  "urls": {
    "status": "<string>",
    "page_images": "<string>",
    "viewer": "<string>"
  }
}