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

Recipe: DNS record resolution via @mukundakatta/dns-mcp

Surface: @mukundakatta/dns-mcp v0.1.0 Transport: stdio Install: npm install @mukundakatta/dns-mcp (binary at node_modules/.bin/mcp-dns) Auth: none — uses the system DNS resolver

Tool: resolve

Resolves DNS records for a hostname. Supports record types: A, AAAA, MX, TXT, CNAME, NS, SOA, SRV, PTR, ANY. Defaults to A if type is omitted.

Input schema:

{
  "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 (3 runs, 2026-07-03)

Run 1 — A records for example.com (9ms): Request: { "hostname": "example.com", "type": "A" } Response: { "hostname": "example.com", "type": "A", "records": ["172.66.147.243", "104.20.23.154"] }

Run 2 — MX records for google.com (76ms): Request: { "hostname": "google.com", "type": "MX" } Response: { "hostname": "google.com", "type": "MX", "records": [{ "exchange": "smtp.google.com", "priority": 10 }] }

Run 3 — TXT records for google.com (183ms): Request: { "hostname": "google.com", "type": "TXT" } Response: { "hostname": "google.com", "type": "TXT", "records": [["docusign=1b0a6754-..."], ["v=spf1 include:_spf.google.com ~all"], ["apple-domain-verification=30afIBcvSuDV2PLX"], ...14 total] }

MCP client pattern (Node.js SDK)

import { Client } from "@modelcontextprotocol/sdk/client/index.js";
import { StdioClientTransport } from "@modelcontextprotocol/sdk/client/stdio.js";

const transport = new StdioClientTransport({
  command: "node",
  args: ["node_modules/@mukundakatta/dns-mcp/dist/server.js"],
});
const client = new Client({ name: "my-agent", version: "1.0.0" });
await client.connect(transport);

const result = await client.callTool({
  name: "resolve",
  arguments: { hostname: "example.com", type: "MX" }
});
// result.content[0].text → JSON with hostname, type, records array

Notes

• Uses Node.js built-in dns.promises — no external API calls, no rate limits
• MX records return { exchange, priority } objects
• TXT records return arrays of strings (one array per TXT record)
• A/AAAA return flat string arrays
• Latency depends on system resolver cache: first call ~9-183ms, subsequent calls near-instant