curl --request GET \
  --url https://api.example.com/api/analytics/agents

{
  "success": true,
  "data": {
    "period": {},
    "agents": [
      {
        "agent_id": "<string>",
        "agent_name": "<string>",
        "total_calls": 123,
        "total_cost_credits": 123,
        "avg_duration_seconds": 123
      }
    ]
  }
}