curl https://api.voicy.co/v1/get-agent/550e8400-e29b-41d4-a716-446655440001 \
  -H "Authorization: Bearer voicy_sk_live_xxx"

{
  "agent_id": "550e8400-e29b-41d4-a716-446655440001",
  "agent_name": "Customer Support Agent",
  "account_id": "550e8400-e29b-41d4-a716-446655440099",
  "account_name": "Acme Corp",
  "voice_id": "openai:sage",
  "language": "en",
  "begin_message": "Hello! How can I help you today?",
  "agent_prompt": "You are a helpful customer support agent...",
  "begin_message_mode": "static",
  "prompt_text_direction": "ltr",
  "vars_provided": [
    {
      "name": "customer_name",
      "type": "string",
      "default_value": null,
      "description": "Customer's full name"
    }
  ],
  "vars_extracted": [
    {
      "name": "appointment_date",
      "type": "string",
      "description": "Preferred appointment date",
      "required": true
    }
  ],
  "version": 3,
  "deployed_at": null,
  "agent_type": "singlePrompt",
  "notification_emails": []
}