Nslookup MCP Server

by venomseven Your server? Claim it

answering

Nslookup is answering right now. Last checked 11 min ago. 141 installs a week from npm. It exposes 23 tools. Last commit 17 Jul 2026.

DNS lookups, health reports, SSL certs, security scans, GEO scoring, uptime checks

Installs per day peak 46 · avg 12 · +127% w/w

a month agotoday

Uptime history 91 days of history · worst day 93%

91 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

192 ms

Response time

average over 24h

141

Installs / week

npm and PyPI

Nothing serious here today

Today is the operative word: we check Nslookup every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 11 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add nslookup --transport http https://mcp.nslookup.io/mcp

Settings → Connectors → Add custom connector, then paste this address

https://mcp.nslookup.io/mcp

~/.codex/config.toml

[mcp_servers.nslookup]
url = "https://mcp.nslookup.io/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "nslookup": {
      "url": "https://mcp.nslookup.io/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "nslookup": {
      "type": "http",
      "url": "https://mcp.nslookup.io/mcp"
    }
  }
}

Available tools 23

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

dns

dns_change_review

Review proposed DNS changes BEFORE applying them. Compares a domain's current public DNS with a proposed future state, returns a diff, deterministic rule-based findings (SPF/DMARC/MX/CAA/DNSSEC pitfalls, dangling records, mail breakage, etc.) with suggested fixes, and an overall 0-100 risk score. Stateless — nothing is stored.

dns_health

Run a comprehensive DNS health audit on a domain — 39 checks across 7 categories: DNSSEC (chain of trust, algorithms, validation), MX & email (PTR, MTA-STS, redundancy), DNS hygiene (SPF conflicts, wildcards, apex CNAME), TTL & SOA configuration, nameserver setup (diversity, lame delegation, EDNS0), CAA certificates, and operational maturity (security.txt, abuse mailbox). Returns an overall severity-weighted score (0–100) plus per-category scores.

dns_lookup

Look up all common DNS records (A, AAAA, NS, MX, TXT, CNAME, SOA) for a domain. Returns results from a specified DNS server.

dns_propagation

Check DNS propagation for a domain across 18+ global DNS servers (Cloudflare, Google, Quad9, OpenDNS, regional servers, and authoritative nameservers). Shows if DNS changes have propagated worldwide.

dns_record

Look up a specific DNS record type for a domain. Supports 53 record types including A, AAAA, MX, TXT, CNAME, SOA, PTR, CAA, SRV, DNSKEY, DS, TLSA, HTTPS, SPF, and more.

my_dns_changes

List recent DNS changes detected on your monitored domains, each with its DNS Change Review risk assessment (0-100 risk score, severity counts, added/removed/modified record counts), plus the latest risk per monitor. Requires sign-in to your NsLookup.io account (or an API token).

uptime

my_uptime_history

Get uptime and response-time history for one of your NsLookup.io uptime monitors: availability stats plus hourly buckets over the requested window. Identify the monitor by id or by URL. Requires sign-in to your NsLookup.io account (or an API token).

uptime_check

Perform a one-time HTTP uptime check on a URL from a single location. Returns whether the site is up or down, HTTP status code, and response time in milliseconds. For multi-location checks, use uptime_check_multi instead.

uptime_check_multi

Check if a website is up or down from 7 global locations simultaneously: Amsterdam, Sydney, London, Frankfurt, Delhi, Warsaw, and South Carolina. Returns status, response time, and HTTP status code for each location.

bimi

bimi_check

Check only the BIMI (Brand Indicators for Message Identification) DNS record for a domain — faster than bimi_vmc because it skips the VMC certificate download and validation. Returns the BIMI record at default._bimi.<domain>, logo URL, and authority (VMC) URL if declared.

bimi_vmc

Check BIMI (Brand Indicators for Message Identification) and VMC (Verified Mark Certificate) for a domain. Returns BIMI DNS record status, VMC certificate details, logo URL, trademark info, and expiry.

certificates

my_certificates

Get an SSL certificate expiry overview for your monitored domains: per-alert-level counts (ok / warning / critical / expired) and every certificate sorted by soonest expiry, highlighting the ones expiring within 30 days. Requires sign-in to your NsLookup.io account (or an API token).

domain

domain_scanner

Scan a domain's email security posture: SPF, DKIM, DMARC, and BIMI configuration. Returns per-indicator scores and detected issues so you can see how well the domain is protected against spoofing and phishing.

geo

geo_checker

Check a domain's GEO (Generative Engine Optimization) score — how well the site is optimized for AI search engines like ChatGPT, Gemini, Claude, and Perplexity. Returns three scores (Technical Readiness, Entity Readiness, Answer Readiness), AI crawler access status, structured data analysis, and prioritized recommendations.

hosting

hosting_report

Find out who hosts a website. Returns the hosting provider, IP/ASN/network owner, server location, DNS/nameserver provider, CDN or proxy detection (Cloudflare, Fastly, etc.), SSL certificate issuer, and mail servers/provider for a domain in one combined report.

incidents

my_incidents

List incidents from your NsLookup.io monitoring (downtime, SSL expiry, DNS changes, propagation issues, VMC problems) — open ones by default, or the full recent history — plus a per-status/per-source summary. Requires sign-in to your NsLookup.io account (or an API token).

monitors

my_monitors

List all monitors in your NsLookup.io account across every type — uptime, API, DNS, WHOIS, DNS propagation, SSL certificates, and BIMI/VMC — with their configuration and latest known state. Requires sign-in to your NsLookup.io account (or an API token).

overview

my_overview

Get an account health snapshot for your NsLookup.io monitoring: an aggregated 0-100 health score with per-subsystem breakdown (uptime, SSL, DNS, propagation, VMC, WHOIS) plus your current product limits/quota. Requires sign-in to your NsLookup.io account (or an API token).

rdap

rdap_lookup

Look up registration data (RDAP — the successor to WHOIS) for an IP address, AS number, or domain name. The query type is detected automatically. Returns the owning organization, network range/CIDR, RIR (ARIN, RIPE, APNIC, LACNIC, AFRINIC), country, status, registration/last-changed dates, nameservers, and abuse/registrant contacts, plus the raw RDAP JSON.

security

security_scan

Run a security scan on a domain to detect DNS misconfigurations, missing SPF/DKIM/DMARC records, cookie security issues, and other web security vulnerabilities. Returns findings with severity levels (critical, high, medium, low, info).

ssl

ssl_certificate

Check the SSL/TLS certificate for a domain. Returns issuer, expiry date, days until expiry, certificate chain validity, cipher strength, SAN domains, fingerprint, and TLS protocol version.

status

status_page

Read a public status page hosted on nslookup.io status pages. Returns the page name, overall status, per-component status and uptime, and active incidents/maintenance. Look up by slug (pages served at hosted.nslookup.io/<slug>) or by the custom domain the page is served on. Provide exactly one of slug or domain.

webservers

webservers

Get the IP addresses (both IPv4 and IPv6) for a domain by looking up A and AAAA records. Also returns the punycode and unicode domain representations.

Endpoints

URL	Transport	State	Latency	Checked
https://mcp.nslookup.io/mcp	streamable-http	answering	164 ms	11 min ago

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8 tools answering

Nslookup — questions

Answers built from our own checks of this server.

What can Nslookup do?

It exposes 23 tools, read directly from the server on our last check. Among them: bimi_check, bimi_vmc, dns_change_review, dns_health, dns_lookup, dns_propagation and 17 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

What is Nslookup mostly used for?

Its tools cluster around dns, uptime and bimi. That is what this server is built to work with — the grouping comes from the actual tool names, not from a category we assigned.

Is Nslookup working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 192 ms. The bar chart above shows every period we have measured.

How do I connect Nslookup?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Nslookup need an API key?

No. Nslookup completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 23 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Nslookup?

It answers our handshake in 192 ms on average, which is faster than 73% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.

How many people use Nslookup?

The npm package @nslookup-io/mcp-server was installed 141 times in the last week. Week over week that is +127%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.

Is Nslookup open source?

The code is open source: it is published under the Apache-2.0 licence, written in TypeScript and 23 stars on GitHub. The licence covers the code in the repository, not the hosted service at mcp.nslookup.io, which runs on its operator's own terms.