curl --request GET \
  --url 'http://localhost:8000/metrics/json' \
  --header 'Authorization: Bearer YOUR_API_KEY'

{
  "timestamp": "2026-07-24T12:00:00Z",
  "system_metrics": {},
  "api_metrics": {},
  "performance_metrics": {},
  "security_metrics": {},
  "cache_metrics": {}
}