Is This Site Down?

Ask your assistant "is X down?" and it runs a live HTTP check from Singapore and Boston. That way a site blocking one region isn't reported as an outage. It can also list which of 634 popular sites are down right now, show a site's uptime history and recent incidents, and report when a site's TLS certificate expires. No API key and no sign-up. It's the same free public API that downforjustmeoreveryone.com runs on.

该来源不提供完整文件导出（国内平台多为平台内托管），仅存元数据与原链

模型生成摘要（rules/v1 · 2026-09-27 16:55）：Ask your assistant "is X down
这是模型对公开材料的总结，不是官方声明，请以原链内容为准。

接入信息

传输形态: http
鉴权方式: 鉴权未知
端点: https://is-it-down--isitdown.run.tools

鉴权方式未标注，请核对官方文档后再接入——不要直接使用以下片段

{
  "mcpServers": {
    "Is This Site Down?": {
      "url": "https://is-it-down--isitdown.run.tools"
    }
  }
}

能力清单

工具	说明
check_site	Live up/down check of any public website from an independent server (Singapore; Boston for sites that geo-block Singapore). Returns a one-sentence verdict plus status code, latency, resolved IP, redirect target, the view from the other region when available, and how many users reported problems in the last hour. Results are cached 30 s per domain.
list_outages	Lists the monitored sites (634 across 17 categories) that are confirmed down right now: two consecutive failed checks from their home region and no other region seeing them up in the last 15 minutes. Optional category filter.
site_history	Uptime percentage over 24 h and over the requested window (up to 7 days), the list of outages in that window, when the site was last seen down, the current state and user-report counts. Only for monitored sites (see list_monitored_sites); use check_site for anything else.
check_certificate	Reads the HTTPS certificate of a public domain and reports days until expiry, the expiry date and the issuer.
list_monitored_sites	The 634 sites checked every 5 minutes, grouped in 17 categories. Without arguments returns the category list with counts; filter by category or a text query to get domains (at most 200 per call).

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侵权举报经核验成立后，我们会即时下线该条目并删除已存的内容副本。