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Hivex: .si names, DNS and WHOIS

si.hivex/nameshivex.sistreamable-httpv1.0.1Scanned

Find and check free .si names (600,000+ indexed), and look up DNS and WHOIS for any domain.

4 tools: 1 change things and 3 only read.

Tools: 0 delete, 0 irreversible, 1 write, 3 read.
  • Reads private data · 0
  • Reads text others write · 3
  • Can send data out · 0
  • No findings

Tools listed without sign-in. Remote posture

Anlyon alternative

1 of these tools change something. Run those as governed actions.

Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.

Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.

Import an OpenAPI spec →
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Tools

Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.

4 tools

Changes things 1Claude Code: ask
  • check_nameLook up one .si domain name: whether Hivex lists it as free or likely free, whether it is for sale on Hivex, or whether someone registered it, plus a DNS lookup made now.Reads text others writeNo findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    Description, as the server wrote it
    Look up one .si domain name: whether Hivex lists it as free or likely free, whether it is for sale on Hivex, or whether someone registered it, plus a DNS lookup made now. Returns the name's hivex.si page, where the user runs the final live registry check before registering.

    Annotations the server declares

    • title: Check a .si name
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
Only reads 3Show 3 read-only tools
  • dns_lookupLook up the DNS records of any domain or hostname on any extension, live, through Cloudflare's public resolver: A, AAAA, CNAME, MX, NS, TXT, CAA, SOA and more, or the reverse DNS (…Reads text others writeNo findings

    Why it is in this group

    • The name "dns_lookup" says "lookup": a word for reading.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    Description, as the server wrote it
    Look up the DNS records of any domain or hostname on any extension, live, through Cloudflare's public resolver: A, AAAA, CNAME, MX, NS, TXT, CAA, SOA and more, or the reverse DNS (PTR) of an IP address. Returns the records with their TTLs and the hivex.si page that explains what they mean.

    Annotations the server declares

    • title: Look up DNS records
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
  • find_namesSearch Hivex's index of .si domain names that are free to register.No findings

    Why it is in this group

    • The name "find_names" says "find": a word for reading.
    Description, as the server wrote it
    Search Hivex's index of .si domain names that are free to register. Filter by a word or fragment (contains, starts with, ends with, exact), length and minimum score; sort by best score, newest or shortest. Returns up to 25 names, each with its hivex.si page.

    Annotations the server declares

    • title: Find .si names
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • whois_lookupLook up the registration record of any domain, live from its registry's RDAP (the successor of WHOIS): whether it is registered, the registrar, creation and expiry dates, status co…Reads text others writeNo findings

    Why it is in this group

    • The name "whois_lookup" says "lookup": a word for reading.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    Description, as the server wrote it
    Look up the registration record of any domain, live from its registry's RDAP (the successor of WHOIS): whether it is registered, the registrar, creation and expiry dates, status codes and name servers. Personal details of the holder are never returned. Links to the explained record on hivex.si.

    Annotations the server declares

    • title: Look up a domain's registration
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Exfil surface

Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.

No private-data, untrusted-input, outbound path in this server alone: no tool is tagged private-data or outbound.

Reads private data0
Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write3
Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
Can send data out0
Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.

Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.

Remote posture

What anyone on the internet sees at the remote endpoint: an anonymous initialize and tools/list, and the public OAuth metadata.

Tools listed without sign-in

Looked at Oct 22, 2026, 15:13 UTC, unchanged since Oct 22, 2026. No credentials were sent and no tool was called. What is looked at.

Reachable
yes
HTTP status of an anonymous initialize
200
tools/list served without credentials
yes
Tools that change things, listed without credentials
1
Protocol version
2025-06-18
WWW-Authenticate on 401
not observed
resource_metadata in WWW-Authenticate
not observed
RFC 9728 protected resource metadata
not observed
Authorization servers
not observed
Legacy HTTP+SSE transport
no
Dynamic client registration
not observed
Client ID metadata documents
not observed
  • WarnThe whole server

    The endpoint served tools/list without credentials, and the list has 1 tool that changes things (1 write). Whether a call also works without credentials was not tested: tools are never called.

    Matched text

    https://hivex.si/mcp: tools/list returned 4 tools to an anonymous client, including check_name (write)

    What this check looks for

Findings

Matches of fixed checks, with the text they matched.

No check matched anything in these tool definitions. That is not a safety guarantee.

History

Changes to its tool definitions and to its remote endpoint, newest first.

No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.

All changes to this server

Install

Pinned to version 1.0.1. Values in angle brackets are yours to fill in.

claude mcp add --transport http names https://hivex.si/mcp
claude mcp add --transport http names https://hivex.si/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__names__find_names",
      "mcp__names__dns_lookup",
      "mcp__names__whois_lookup"
    ],
    "ask": [
      "mcp__names__check_name"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as names. Review it before you use it.

Capability tags behind 3 rules
  • mcp__names__check_name untrusted-input
  • mcp__names__dns_lookup untrusted-input
  • mcp__names__whois_lookup untrusted-input

Pin

Keep the decision: fail CI when the tools change, follow every change, or show a badge.

Pin in CI

Fail a build when the tools you reviewed are not the tools the server serves today.

curl -s "https://anlyon.dev/api/v1/servers/si.hivex/names/verify?hash=b4360d4733da319079d4b02604c95147f5c8f8519918a788c8e8b21fbec03db1" | jq -e '.changed == false'

Pinned hash b4360d4733da, from Oct 21, 2026, 19:20 UTC.

Watch

Get told when its tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/si.hivex/names/changes.xml

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Source: MCP Registry. Synced Oct 21, 2026, 18:54 UTC.