{
  "service": "yukikey-hub",
  "usage": "GET /keybox.xml  (header X-Auth-Token: <token>)",
  "info": "多源抓取 + Google 官方吊销核验 + 择优; 每 900s 一轮",
  "endpoints": {
    "health": "/health",
    "status": "/status (auth)",
    "keybox": "/keybox.xml (auth)",
    "alwaysstrong": "/k/<token>/key  (base64, 供 AlwaysStrong 自身拉取)"
  },
  "note": "私钥锁定, 仅本设备使用。keybox 会被 Google 吊销, 本服务只保证『当下有一个全绿的』。"
}