64 Types: personality test

by @zachhhhh · io.github.zachhhhh/64types

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

OnlineRemote
Category
Developer tools
Connection
Remote (HTTP)
Tools
6 reported
Status
Online

Connect it to your AI

Claude Code

claude mcp add --transport http 64types https://64types.app/api/mcp

Claude, ChatGPT, Cursor and other apps

Add it as a custom connector with this URL (Streamable HTTP):

https://64types.app/api/mcp

Cursor, VS Code and other apps (mcp.json)

{
  "mcpServers": {
    "64types": {
      "url": "https://64types.app/api/mcp"
    }
  }
}

Tools it offers

6 tools, as the server itself reported during our check on Oct 31, 2026.

  • 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. Ask the user each one, then call score_test.
  • score_testScore 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.
  • 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 and a link.
  • list_typesThe 16 base types and 4 variants with names, taglines and links.
  • get_pricingWhat is free (the test, result and every type profile) and the optional paid reports with prices and checkout links.
  • get_checkout_linkCheckout link for one paid product, to hand to the user. They pay on Lemon Squeezy; the reply says what happens after payment.

Questions

What is the 64 Types: personality test MCP server?

Free science-based personality test: 64 types from Big Five + HEXACO, with cited profiles. It is made by @zachhhhh and listed in the official MCP Registry as io.github.zachhhhh/64types. MCP (Model Context Protocol) is the open standard that lets AI apps like Claude, ChatGPT and Cursor use outside tools.

How do I add 64 Types: personality test to Claude?

In the Claude app or claude.ai, open Settings, then Connectors, choose "Add custom connector" and paste https://64types.app/api/mcp. In Claude Code, run: claude mcp add --transport http 64types https://64types.app/api/mcp

How do I add 64 Types: personality test to ChatGPT?

ChatGPT can use remote MCP servers as connectors. In ChatGPT settings, under Apps and Connectors, turn on developer mode if asked, create a new connector and paste https://64types.app/api/mcp.

How do I add 64 Types: personality test to Cursor?

Open Cursor settings, go to MCP, choose "Add new MCP server" (or edit ~/.cursor/mcp.json) and add: { "mcpServers": { "64types": { "url": "https://64types.app/api/mcp" } } }

Does 64 Types: personality test work right now?

Yes. It responded when we last checked on 31 Oct 2026. We check remote MCP servers every day.

What can 64 Types: personality test do?

It gives your AI 6 tools, including get_test_questions, score_test, get_type_profile, list_types, get_pricing. The full list is on this page.

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