MCP server

isitdns Official

net.isitdns/isitdns

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

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

Website

At a glance

Type

MCP server

Publisher

isitdns.net (verified by the MCP Registry)

Status

Working at last check

Tools

6

Token cost

About 1,920 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

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

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.isitdns]
url = "https://isitdns.net/mcp"

Gemini CLI

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

Cursor

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

VS Code

{"servers":{"isitdns":{"type":"http","url":"https://isitdns.net/mcp"}}}

Antigravity

agy mcp add isitdns https://isitdns.net/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"isitdns","server_url":"https://isitdns.net/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"isitdns","server_url":"https://isitdns.net/mcp"}

Tools

• check_domain ~209 tokens
  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 why. DNS only, not HTTP or TLS, and not for one record: dig. Measured from the isitdns edge and its probes, never the caller's network. from m
• dig ~579 tokens
  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 for a whole domain: check_domain. Asked over DoH from the isitdns edge. from moves the question to that region's probe as Do53 over UDP, and
• dnssec_chain ~400 tokens
  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 goes insecure, and whether the zone where it goes insecure is itself signed (an island of security). Not for one signed record: dig. Read thro
• registration ~204 tokens
  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 nameservers, whether the delegation is signed. Not for what DNS answers: check_domain. Read over HTTPS from the isitdns edge through IANA's RDAP
• sweep_domain ~314 tokens
  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 and TTL differences, the CAA in effect, and each _acme-challenge TXT or CNAME. Not for a public resolver's answer: dig. Asked with RD=0 over
• trace ~214 tokens
  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 failed, the final answer and its TTLs. Not for every server of a zone: sweep_domain. Each hop is asked with RD=0 over TCP from the isitdns e

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