curl --request GET \
  --url https://docflow.textin.com/api/app-api/sip/platform/v2/category/sample/list \
  --header 'x-ti-app-id: <api-key>' \
  --header 'x-ti-secret-code: <api-key>'

{
  "code": 200,
  "msg": "<string>",
  "result": {
    "total": 10,
    "page": 1,
    "page_size": 20,
    "samples": [
      {
        "sample_id": "1234567890",
        "file_name": "invoice_sample.pdf"
      }
    ]
  }
}