curl --request POST \
  --url https://extraction-api.nanonets.com/api/v1/classify/batch \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: multipart/form-data' \
  --form 'categories=[{"name": "Invoice"}, {"name": "Contract"}, {"name": "Receipt"}]' \
  --form files.items='@example-file'

{
  "success": true,
  "message": "<string>",
  "batch_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "total_files": 123,
  "successful_files": 123,
  "failed_files": 123,
  "results": [
    {
      "success": true,
      "message": "<string>",
      "record_id": "<string>",
      "filename": "<string>",
      "status": "queued",
      "result": {
        "total_pages": 0,
        "mode": "page",
        "splits": [
          {
            "category": "<string>",
            "pages": [
              123
            ],
            "segment_key": "<string>",
            "segments": [
              {
                "value": "<string>",
                "pages": [
                  123
                ]
              }
            ]
          }
        ]
      },
      "processing_time": 123
    }
  ]
}