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64 Types: personality test

io.github.zachhhhh/64typeszachhhhhstreamable-httpv1.0.0Scanned

Free science-based personality test: 64 types from Big Five + HEXACO, with cited profiles.

6 tools: 3 change things and 3 only read.

Tools: 0 delete, 0 irreversible, 3 write, 3 read.
  • Reads private data · 1
  • Reads text others write · 0
  • Can send data out · 0
  • 2 findings

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3 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.

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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.

6 tools

Changes things 3Claude Code: ask
  • get_type_profileResearch-backed profile of a type: a 4-letter base (INTJ) with its 4 variants, or a full 64 Types code (INTJ-CM) with traits, strengths, watch-outs, career, love and growth notes a…Reads private data1 finding

    Why it is in this group

    • The name "get_type_profile" says "get": a word for reading.
    • The input takes a statement or command to run (input.code), which can change anything it can reach.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    What it can reach

    • private-dataThe description's first sentence says "note": it reads notes.

    Findings

    • Warn

      The server marks "get_type_profile" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

      Matched text

      annotations: {"readOnlyHint":true,"openWorldHint":false}; The name "get_type_profile" says "get": a word for reading.

      What this check looks for
    Description, as the server wrote it
    Research-backed profile of a type: a 4-letter base (INTJ) with its 4 variants, or a full 64 Types code (INTJ-CM) with traits, strengths, watch-outs, career, love and growth notes and a link.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: false
  • score_testScore the user's answers to get their 64 Types type (e.g.No 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.
    Description, as the server wrote it
    Score the user's answers to get their 64 Types type (e.g. INTJ-CM), trait percentiles against open norms (~20,000 people), borderline letters, a plain-language summary and a shareable result link.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: false
Only reads 3Show 3 read-only tools
  • get_pricingWhat is free (the test, result and every type profile) and the optional paid reports with prices and checkout links.No findings

    Why it is in this group

    • The name "get_pricing" says "get": a word for reading.
    Description, as the server wrote it
    What is free (the test, result and every type profile) and the optional paid reports with prices and checkout links.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: false
  • get_test_questionsThe 62 public-domain IPIP statements of the free 64 Types personality test (Big Five + HEXACO Honesty-Humility), with the 1-5 answer scale.No findings

    Why it is in this group

    • The name "get_test_questions" says "get": a word for reading.
    Description, as the server wrote it
    The 62 public-domain IPIP statements of the free 64 Types personality test (Big Five + HEXACO Honesty-Humility), with the 1-5 answer scale. Ask the user each one, then call score_test.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: false
  • list_typesThe 16 base types and 4 variants with names, taglines and links.No findings

    Why it is in this group

    • The name "list_types" says "list": a word for reading.
    Description, as the server wrote it
    The 16 base types and 4 variants with names, taglines and links.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: false

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 untrusted-input or outbound.

Reads private data1
Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write0
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.

Findings

Matches of fixed checks, with the text they matched.

2 warn
  • Warnget_type_profile

    The server marks "get_type_profile" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

    Matched text

    annotations: {"readOnlyHint":true,"openWorldHint":false}; The name "get_type_profile" says "get": a word for reading.

    What this check looks for
  • Warnget_checkout_link

    The server marks "get_checkout_link" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

    Matched text

    annotations: {"readOnlyHint":true,"openWorldHint":false}; The name "get_checkout_link" says "get": a word for reading.

    What this check looks for

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 1.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http 64types https://64types.app/api/mcp
claude mcp add --transport http 64types https://64types.app/api/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__64types__get_test_questions",
      "mcp__64types__list_types",
      "mcp__64types__get_pricing"
    ],
    "ask": [
      "mcp__64types__score_test",
      "mcp__64types__get_type_profile",
      "mcp__64types__get_checkout_link"
    ],
    "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 64types. Review it before you use it.

Capability tags behind 1 rule
  • mcp__64types__get_type_profile private-data

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/io.github.zachhhhh/64types/verify?hash=8a7feb660d7e32a668be466b1e5c3bea23b50e4a3fb743fc5e62731508634659" | jq -e '.changed == false'

Pinned hash 8a7feb660d7e, from Oct 29, 2026, 14:18 UTC.

Watch

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

https://anlyon.dev/servers/io.github.zachhhhh/64types/changes.xml

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Source: MCP Registry. Synced Oct 29, 2026, 14:18 UTC.