net.isitdns/isitdns

up checked 2026-11-11T10:38:00.534Z

Unclaimed · Unverified

Publisher-provided title

isitdns

Publisher-provided description

Is it DNS? Audit a site or domain that isn't working: one call says if it resolves and why. No key.

Summary by lookupd

Diagnoses unresolvable domains: checks public DNS resolution, zone audits, DNSSEC chains, RDAP registration data, and delegation traces.

Install

Claude Code, remote (streamable-http)

claude mcp add --transport http isitdns https://isitdns.net/mcp

Codex, remote (streamable-http)

codex mcp add isitdns --url https://isitdns.net/mcp

Cursor, remote (streamable-http) → .cursor/mcp.json

{
  "mcpServers": {
    "isitdns": {
      "url": "https://isitdns.net/mcp"
    }
  }
}

Other clients: docs. Or tell your agent: Set up lookupd for me: read https://lookupd.com/agent.md and follow it.

Publisher-provided text

check_domain Check a domain that is not working: whether the name resolves in public DNS, then the eleven-check audit of its zone, each row ok, warn, fail or skipped with wh
dig Dig one name and type at one board resolver, or at Cloudflare, Google, Quad9 and AdGuard side by side (resolver all): records, flags, rcode, EDE, latency. Not f
trace Trace a delegation from the root to the authority, like dig +trace: each referral and its glue, the one server that answered at each zone cut and any dial that
dnssec_chain Walk the DNSSEC chain from the root to one answer: DS and DNSKEY at each signed zone cut, key tags, signers, signature windows, the first link that breaks or go
sweep_domain Sweep a zone's nameservers: the same names and types asked at a sample of its authoritative addresses, reporting disagreements, lame or silent servers, serial a
registration Read a domain's registration from its registry's RDAP server: each status with what it means for resolution, the registration, expiry and change dates, the name

Shows this live status and links here; updates hourly.

[![lookupd status](https://lookupd.com/badge/net.isitdns/isitdns.svg)](https://lookupd.com/servers/net.isitdns/isitdns)