curl -X POST https://api.rapidcall.ai/api/kb/folders/kb_folder_001/text \
  -H "Authorization: Bearer YOUR_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "Return Policy",
    "content": "Our return policy allows returns within 30 days of purchase. Items must be in original condition with tags attached..."
  }'

{
  "document": {
    "id": "doc_003",
    "name": "Return Policy",
    "type": "text",
    "characterCount": 2450,
    "createdAt": "2026-04-02T12:00:00Z"
  }
}