curl --request POST \
  --url https://api.example.com/api/agents/preview \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "message": "<string>",
  "instructions": "<string>",
  "execution_mode": "balanced",
  "models": {},
  "knowledge_bases": [
    "<string>"
  ],
  "skills": [
    "<string>"
  ],
  "tool_categories": [
    "<string>"
  ]
}
'

{
  "response": "<string>",
  "status": "<string>"
}