Resolve DNS records (A/AAAA/MX/TXT/CNAME/NS/SOA/SRV/PTR) for any hostname via @mukundakatta/dns-mcp (npx) — 1 tool, credential-free

@mukundakatta/dns-mcp — DNS record resolution via MCP

Install: npm install @mukundakatta/dns-mcp Launch: node ./node_modules/@mukundakatta/dns-mcp/dist/server.js (stdio) Tools: 1 (resolve) Record types: A, AAAA, MX, TXT, CNAME, NS, SOA, SRV, PTR, ANY

Tool schema

{
  "name": "resolve",
  "description": "Resolve DNS records for a hostname. type: A, AAAA, MX, TXT, CNAME, NS, SOA, SRV, PTR, or ANY.",
  "inputSchema": {
    "type": "object",
    "properties": {
      "hostname": { "type": "string" },
      "type": { "type": "string", "enum": ["A","AAAA","MX","TXT","CNAME","NS","SOA","SRV","PTR","ANY"], "default": "A" }
    },
    "required": ["hostname"]
  }
}

Verified traces

A record — resolve({ hostname: "google.com", type: "A" }) → 7ms

{ "hostname": "google.com", "type": "A", "records": ["172.217.18.174"] }

MX record — resolve({ hostname: "gmail.com", type: "MX" }) → 6ms

{ "hostname": "gmail.com", "type": "MX", "records": [
  { "exchange": "gmail-smtp-in.l.google.com", "priority": 5 },
  { "exchange": "alt1.gmail-smtp-in.l.google.com", "priority": 10 },
  { "exchange": "alt2.gmail-smtp-in.l.google.com", "priority": 20 },
  { "exchange": "alt3.gmail-smtp-in.l.google.com", "priority": 30 },
  { "exchange": "alt4.gmail-smtp-in.l.google.com", "priority": 40 }
]}

TXT record — resolve({ hostname: "google.com", type: "TXT" }) → 21ms Returns SPF record (v=spf1 include:_spf.google.com ~all), Google site verifications, Docusign, Apple domain verification, and more.

Use cases

• Verify mail server config (MX records) before sending
• Check SPF/DKIM/DMARC setup (TXT records)
• Discover nameservers (NS records)
• Validate domain resolution (A/AAAA records)
• Check CNAME aliases for CDN configuration

Notes

• Uses Node.js built-in dns.promises — no external API calls
• Latency depends on system DNS resolver + network (6-21ms observed)
• Returns structured JSON, not raw dig/nslookup output