nslookup.io MCP Server

<p align="center"> <a href="https://nslookup.io"> <img src="https://www.nslookup.io/img/logo.svg" alt="NSLookup.io" width="300" /> </a> </p>

<p align="center"> <strong>MCP Server for nslookup.io</strong><br/> DNS lookups, SSL certificate checks, security scanning, and domain intelligence — via the Model Context Protocol. </p>

<p align="center"> <a href="https://nslookup.io">Website</a> · <a href="https://docs.nslookup.io">API Docs</a> · <a href="https://www.npmjs.com/package/@nslookup-io/mcp-server">npm</a> · <a href="https://nslookup.io/contact-us/">Contact</a> </p>

Tools

DNS Tools

Tool	Description
dns_lookup	Look up all common DNS records (A, AAAA, NS, MX, TXT, CNAME, SOA) for a domain
dns_record	Look up a specific DNS record type — supports all 53 types (HTTPS, DNSKEY, TLSA, SPF, etc.)
dns_propagation	Check DNS propagation across 18+ global servers (Cloudflare, Google, Quad9, regional, authoritative)
webservers	Get IPv4 and IPv6 addresses for a domain

Security & Certificate Tools

Tool	Description
ssl_certificate	Check SSL/TLS certificate — issuer, expiry, chain validity, cipher strength, SAN domains, TLS version
bimi_vmc	Check BIMI record and VMC (Verified Mark Certificate) — logo URL, trademark info, certificate expiry
security_scan	Scan a domain for security issues — SPF/DKIM/DMARC, cookie security, DNS misconfigurations
uptime_check	One-time HTTP uptime check — status, response time, HTTP status code

Supported DNS Record Types

A, AAAA, AFSDB, APL, AXFR, CAA, CDNSKEY, CDS, CERT, CNAME, CSYNC, DHCID, DLV, DNAME, DNSKEY, DS, EUI48, EUI64, HINFO, HIP, HTTPS, IPSECKEY, IXFR, KEY, KX, LOC, MX, NAPTR, NS, NSEC, NSEC3, NSEC3PARAM, NXT, OPENPGPKEY, OPT, PTR, RP, RRSIG, SIG, SMIMEA, SOA, SPF, SRV, SSHFP, SVCB, TA, TKEY, TLSA, TSIG, TXT, URI, ZONEMD

DNS Servers

cloudflare, google, quad9, opendns, authoritative, and regional servers in South Africa, Australia, India, Netherlands, Canada, USA, Brazil, Ukraine, Russia.

Setup

Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "nslookup": {
      "command": "npx",
      "args": ["-y", "@nslookup-io/mcp-server"]
    }
  }
}

Claude Code

Available globally (all projects):

claude mcp add nslookup --scope user -- npx -y @nslookup-io/mcp-server

Or for a specific project only:

claude mcp add nslookup --scope project -- npx -y @nslookup-io/mcp-server

Manual / Local

git clone https://github.com/nslookup-io/nslookup-mcp.git
cd nslookup-mcp
npm install
npm run build
npm start

Configuration

Environment Variable	Default	Description
NSLOOKUP_API_URL	https://www.nslookup.io	Base URL for the nslookup.io API

Example Prompts

Once configured, you can ask Claude things like:

• "What are the DNS records for github.com?"
• "Check the MX records for google.com"
• "Has the DNS propagated for my-domain.com A record?"
• "What IP addresses does cloudflare.com resolve to?"
• "Show me the DNSKEY records for example.com"
• "Check the SPF record for amazon.com"
• "Check the SSL certificate for github.com"
• "Does google.com have a BIMI record?"
• "Run a security scan on example.com"
• "Is https://cloudflare.com up right now?"
• "Check DNS propagation for example.com NS records across all global servers"

Feedback

We'd love to hear from you! At nslookup.io, we're building a fast, reliable, and free DNS lookup tool and monitoring platform for everyone — from developers and sysadmins to everyday internet users.

Your feedback is what helps us improve. Whether you've spotted a bug, have a feature idea, or just want to share your thoughts — we're listening. Contact us.

License

Apache 2.0