WHOIS MCP Server - install, status & alternatives [2026]

01 · Install WHOIS

before you install - you'll need

Set WHOIS_REDIS_ADDR, WHOIS_BOOTSTRAP_INTERVAL, WHOIS_AUTH_KEYS before connecting.

Claude Code

claude mcp add kincaidyang-whois --transport http https://whois.ddnsip.cn/mcp

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "kincaidyang-whois": {
      "url": "https://whois.ddnsip.cn/mcp"
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

https://whois.ddnsip.cn/mcp

transport: streamable-http

endpoint alive - responded to MCP initialize · probed 2026-09-30

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as remote - your agent's requests go to whois.ddnsip.cn

endpoint auth accepted our unauthenticated MCP initialize - no credentials needed to connect

license MIT - declared in the repository

registry namespace io.github.KincaidYang is GitHub-verified and matches the repo owner

03 · What WHOIS can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

Latest releases

v1.4.0 · 2026-09-26

安全 · 出站连接防护：查询 RDAP、WHOIS 和拉取 IANA 引导数据时，拒绝连接环回、私网（RFC 1918 / ULA）、链路本地（含云主机元数据地址 169.254.169.254）、组播和未指定地址。检查在建立连接时针对解析后的实际地址进行，DNS 重绑定也绕不过去。重定向最多 5 跳，且不允许从 https 降级为 http。100.64.0.0/10 与 198.18.0.0/15 保持可达（常见代理工具的…

v1.3.0 · 2026-08-22

安全：构建改用 Go 1.27.0（原 1.26.5）。govulncheck 实证 1.26.5 构建出的二进制有五条可达的标准库公告，全部在 1.26.6 修复并带进 1.27.0：GO-2026-6089（net/http 对明文 HTTP/2 探测没有应用 ReadHeaderTimeout，客户端可以把连接按住超过头部超时，本服务的 ListenAndServe 可达）、GO-2026-6218（net/url…

v1.2.0 · 2026-07-26

新增：纯内存模式 - - redis.addr 留空即彻底禁用 Redis，不建客户端、不尝试连接、/health 报 memory 后端。此前留空会去连隐式的 localhost:6379 再失败回退。WHOIS_REDIS_ADDR 区分「未设置」（沿用配置文件）与「显式为空」（禁用 Redis），容器部署不挂配置文件也能用；cache.requireRedis: true 配空地址属自相矛盾，启动即报错 · 修复：TLD 既无…

04 · Who maintains WHOIS

WHOIS is maintained by kincaidyang. It's the only MCP server we track from this author; the repo dates to Sep 2023.

05 · Facts

repository: github.com/kincaidyang/whois
website: https://github.com/KincaidYang/whois
category: cloud infrastructure - ranked #100 of 165 actively-maintained cloud infrastructure servers as of 2026-09-30.
release cadence: 4 releases in the last 90 days (latest 2026-09-26)
registry: io.github.KincaidYang/whois (active, first published 2026-07-11 · 4 versions)

06 · WHOIS FAQ

What is WHOIS?

基于 Golang 实现的域名 Whois 查询工具，支持所有允许公开查询的 TLD 后缀的域名、IPv4/v6、ASN 的 Whois 信息查询。根据 ICANN 《通用顶级域名注册数据临时政策细则（Temporary Specification for gTLD Registration Data）》和欧盟《通用数据保护条例》合规要求，在查询域名信息时，程序只返回了部分必要的信息（详见下方返回结果示例），不会返回所有者的联系方式、地址、电话、邮箱等字段。. It is available as a remote MCP endpoint.

Is WHOIS still maintained?

Yes - as of 2026-09-30, its last commit was 2026-09-26 and it shipped 4 releases in the last 90 days. We re-verify nightly.

How do I install WHOIS?

Run `claude mcp add kincaidyang-whois --transport http https://whois.ddnsip.cn/mcp`. The README documents 3 environment variables (WHOIS_REDIS_ADDR, WHOIS_BOOTSTRAP_INTERVAL, WHOIS_AUTH_KEYS) to set first. Set WHOIS_REDIS_ADDR, WHOIS_BOOTSTRAP_INTERVAL, WHOIS_AUTH_KEYS before connecting. You can also paste the ready-made client config above.

Does WHOIS require authentication?

No - the endpoint accepted our unauthenticated MCP initialize when probed on 2026-09-30; you can connect without credentials.

07 · Alternatives to WHOIS

Alternatives to WHOIS

Maintained cloud infrastructure servers if WHOIS isn't the fit.

Pairs well with

Servers that cover what WHOIS doesn't - only shown when the pairing reason fits the companion.

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