curl --request POST \
  --url https://extraction-api.nanonets.com/api/v2/classify/sync \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "input": "file://a1b2c3d4-e5f6-7890-abcd-ef1234567890",
  "classification_config": {
    "categories": [
      {
        "name": "Invoice",
        "description": "Bills and invoices"
      },
      {
        "name": "Receipt",
        "description": "Payment receipts"
      },
      {
        "name": "Contract",
        "description": "Legal agreements"
      }
    ],
    "mode": "document"
  }
}
'

{
  "success": true,
  "message": "Document classified successfully",
  "status": "completed",
  "result": {
    "filename": "invoice.pdf",
    "total_pages": 3,
    "mode": "document",
    "document_category": "Invoice",
    "confidence": 92.5,
    "reasoning": "Page 1: Contains invoice header with vendor details; Page 2: Itemized list of products with pricing"
  },
  "processing_time": 1.5,
  "filename": "invoice.pdf"
}