curl --request DELETE \
  --url https://api.coval.dev/v1/monitors/{monitor_id} \
  --header 'X-API-Key: <api-key>'

{
  "error": {
    "code": "UNAUTHENTICATED",
    "message": "Authentication failed",
    "details": [
      {
        "field": "X-API-Key",
        "description": "Invalid or missing API key"
      }
    ]
  }
}