Dnstwist

Name: Dnstwist
Author: w0h1v

by w0h1vversion 1.1.4i★ –iRuns on your computer

Registry nameio.github.w0h1v/dnstwist

Install

Overview

Description from the maker (original English)

MCP server for dnstwist: detect typosquatting, phishing and brand impersonation domains.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Cybersecurity

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
You fill in yourself: DNSTWIST_RUNNER, DNSTWIST_TIMEOUT_SECONDS

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "dnstwist": {
      "command": "npx",
      "args": [
        "-y",
        "@burtthecoder/mcp-dnstwist"
      ],
      "env": {
        "DNSTWIST_RUNNER": "your-value",
        "DNSTWIST_TIMEOUT_SECONDS": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add dnstwist --env DNSTWIST_RUNNER=your-value --env DNSTWIST_TIMEOUT_SECONDS=your-value -- npx -y @burtthecoder/mcp-dnstwist

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "dnstwist": {
      "command": "npx",
      "args": [
        "-y",
        "@burtthecoder/mcp-dnstwist"
      ],
      "env": {
        "DNSTWIST_RUNNER": "your-value",
        "DNSTWIST_TIMEOUT_SECONDS": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "dnstwist": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@burtthecoder/mcp-dnstwist"
      ],
      "env": {
        "DNSTWIST_RUNNER": "your-value",
        "DNSTWIST_TIMEOUT_SECONDS": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

DNSTWIST_RUNNER env
How to run dnstwist: docker, local, or auto (default: a dnstwist on PATH, else Docker)
DNSTWIST_TIMEOUT_SECONDS env
Maximum seconds a scan may run before it is stopped (default 600)

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 8, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account w0h1v, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Cybersecurityi

More stars than 0% of the other 996 servers in this category
Published to the registry more recently than 93% of the other 996 servers in this category
Basic checks equal to or better than 100% of the other 996 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Dnstwist safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.1.4) reached the registry 3 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Action1 MCP by usefulapi, QNSQY, EchelonGraph CVE & Exposure

Alternatives

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README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

Quickstart · Tool · Security · Troubleshooting · Docs

mcp-dnstwist is an MCP server that lets AI agents run dnstwist to find domains that imitate yours: typos, homoglyphs, bit flips, swapped TLDs and more. For each registered lookalike it can report DNS records, whether its mail server could intercept your email, WHOIS registration details, and how closely its web page copies yours.

[!NOTE]

Independent project, not affiliated with dnstwist. Only scan domains you own or are authorized to assess.

[!IMPORTANT]

Versions up to 1.0.4 have a command injection vulnerability (GHSA-p4jr-h3rj-2rw4) and are deprecated. Use 1.0.5 or later; npx -y @burtthecoder/mcp-dnstwist always fetches the latest.

Highlights

Lookalike discovery. All of dnstwist's permutation algorithms, or only the ones you pick.
Threat signals. DNS records, open mail relays that could intercept email (mxcheck), WHOIS creation date and registrar, HTTP and SMTP banners, and web-page similarity (ssdeep or TLSH) to spot cloned phishing sites.
Runs your way. A local dnstwist install, the official dnstwist Docker image, or a self-contained mcp-dnstwist image.
Hardened. No shell, strict input validation, and time limits that stop and clean up long scans.
Tested. End-to-end tests with fake docker and dnstwist executables run in CI on Node 20, 22 and 24.

How it works

flowchart LR

Quickstart

Requirements: Node.js 20.3 or newer, and either dnstwist (pipx install "dnstwist[full]") or Docker. No API key.

# Claude Code

claude mcp add --transport stdio dnstwist -- npx -y @burtthecoder/mcp-dnstwist

Codex CLI

codex mcp add dnstwist -- npx -y @burtthecoder/mcp-dnstwist

Gemini CLI

gemini mcp add dnstwist npx -y @burtthecoder/mcp-dnstwist

For Claude Desktop, VS Code, Docker and running from source, see Connect a client.

Then ask your agent: *"Which lookalike domains of example.com are registered, and could any of them intercept email?"* More prompts are in example workflows.

The tool

One tool, fuzz_domain. Full parameters and real sample output are in the tool reference.

Parameter	Default	What it does
`domain`	(required)	The domain to imitate, for example `example.com`
`registered_only`	`true`	Only return lookalikes that exist
`fuzzers`	all	Limit to some algorithms, for example `["homoglyph", "bitsquatting"]`
`mxcheck`	`true`	Flag mail servers that would accept email for any address
`banners`	`true`	Capture HTTP and SMTP banners
`whois`	`false`	Registration date and registrar
`lsh`	off	Web-page similarity to the original: `ssdeep` or `tlsh`
`all_records`	`false`	All DNS records, not only the first of each type
`nameservers`	`1.1.1.1`	Up to 10 IPv4 addresses or `https:// /dns-query` URLs
`threads`	`50`	Parallel lookups, 1 to 100
`format`	`json`	`json`, `csv` or `list`

Settings

Variable	Default	Description
`DNSTWIST_RUNNER`	`auto`	`local` (dnstwist on `PATH`), `docker` (the `elceef/dnstwist` image), or `auto` (local if available)
`DNSTWIST_TIMEOUT_SECONDS`	`600`	Longest a scan may run. On timeout, cancellation or shutdown the scan is stopped and cleaned up

Security

The tool's arguments come from an AI model, which content it reads can steer, so the server treats them as hostile:

No shell. dnstwist starts with execFile and an argument array; a test fails the build if a shell-based API appears.
Strict validation. Domains must be hostnames, nameservers IPv4 or DoH URLs, numbers and names from fixed sets. No value can start with -.
Bounded runs. Time limits, and cleanup of processes and containers on timeout, cancellation and shutdown.

The Docker runner needs access to the Docker daemon (root-equivalent on most systems). The local runner or the self-contained image avoid that. Details in the security model. Report vulnerabilities privately; see SECURITY.md.

Troubleshooting

"Neither dnstwist nor Docker is available": install dnstwist (pipx install "dnstwist[full]") or start Docker. Desktop clients may not see your shell's PATH.
Slow on Apple Silicon: the dnstwist Docker image is amd64-only. Install dnstwist locally; it's used automatically.
"did not finish within N seconds": include an IPv4 nameserver (DNS-over-HTTPS is slow), turn off whois, lsh or banners, or raise DNSTWIST_TIMEOUT_SECONDS.

Development

git clone https://github.com/w0h1v/mcp-dnstwist && cd mcp-dnstwist

npm ci npm test # fake docker and dnstwist executables: no Docker or network needed

See CONTRIBUTING.md and the changelog.

License

MIT. See LICENSE.

Dnstwist

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Cybersecurityi

Common questions

Alternatives

Action1 MCP by usefulapi

QNSQY

EchelonGraph CVE & Exposure

README from the maker

Highlights

How it works

Quickstart

Codex CLI

Gemini CLI

The tool

Settings

Security

Troubleshooting

Development

License