# 64 Types: personality test (remote · 64types.app)

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

- Trust score: 73/100 (medium)
- Change this week: +50
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `64types.app`: 73/100 (this document), [markdown](https://verifymcp.io/servers/zachhhhh-64types/api-mcp.md), [page](https://verifymcp.io/servers/zachhhhh-64types/api-mcp)

## Channel facts

- Endpoint: `https://64types.app/api/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-11-05.

- **Endpoint Security**: 74/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS is enforced; there's no plaintext access path.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 71/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 463 tokens (~77/item across 6 items; 6 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 20/100
  - Stability observed for 6 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 6 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 7 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a current MCP spec version (2026-07-28).

## Install

### How do I install the 64 Types: personality test MCP server?

64 Types: personality test is a hosted endpoint at https://64types.app/api/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http zachhhhh-64types 'https://64types.app/api/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "zachhhhh-64types": {
      "url": "https://64types.app/api/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "zachhhhh-64types": {
      "type": "http",
      "url": "https://64types.app/api/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.zachhhhh-64types]
url = "https://64types.app/api/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "zachhhhh-64types": {
      "type": "remote",
      "url": "https://64types.app/api/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add zachhhhh-64types --url 'https://64types.app/api/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  zachhhhh-64types:
    url: "https://64types.app/api/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "zachhhhh-64types": {
      "Transport": "http",
      "Url": "https://64types.app/api/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add zachhhhh-64types -t streamable-http -u 'https://64types.app/api/mcp'
```

### Other

```json
{
  "mcpServers": {
    "zachhhhh-64types": {
      "type": "http",
      "url": "https://64types.app/api/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-11-05 (score 73, 0)

- [cosmetic] “get_checkout_link” reworded the description of “product”

### 2026-11-04 (score 73, +1)

No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-11-02 (score 72, +1)

No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-31 (score 71, +1)

- [functional improvement] Stability: unverified → 0.03

### 2026-10-30 (score 70, +47)

- [security improvement] Authorization: unverified → partial
- [security improvement] Injection markers: unverified → pass
- [security improvement] Transport: fail → pass
- [security] First check of Judged manipulation: pass
- [functional improvement] Tool coverage: unverified → 100
- [functional improvement] MCP protocol: unverified → pass
- [functional] First check of Schema quality: fail
- [functional] First check of Destructive annotations: pass
- [functional] First check of Schema quality: pass
- [functional] First check of Schema quality: good
- [functional] First check of Tool coverage: 100

### 2026-10-29 (score 23)

First indexed and scored.

## MCP tools (6)

### `get_test_questions` (~57 tokens)

Get the personality test questions

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.

### `score_test` (~84 tokens)

Score the personality test

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.

Input parameters:

- `answers` (object, required): Question id from get_test_questions -> the user's answer, 1 (very inaccurate) to 5 (very accurate)

### `get_type_profile` (~77 tokens)

Get a personality type profile

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.

Input parameters:

- `code` (string, required): INTJ, or INTJ-CM

### `list_types` (~25 tokens)

List all 64 types

The 16 base types and 4 variants with names, taglines and links.

### `get_pricing` (~33 tokens)

Get 64 Types pricing

What is free (the test, result and every type profile) and the optional paid reports with prices and checkout links.

### `get_checkout_link` (~71 tokens)

Get a checkout link

Checkout link for one paid product, to hand to the user. They pay on Lemon Squeezy; the reply says what happens after payment.

Input parameters:

- `product` (string, required): deep_report (29-facet Deep Report), full_report (instant Full Report), couple_report, plus_monthly or plus_yearly

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/zachhhhh-64types/api-mcp#diagnostics

## Score history

- 2026-11-05: 73
- 2026-11-04: 73
- 2026-11-03: 72
- 2026-11-02: 72
- 2026-11-01: 71
- 2026-10-31: 71
- 2026-10-30: 70
- 2026-10-29: 23

## Common questions

### What is the 64 Types: personality test MCP server?

64 Types: personality test is an MCP server listed in the public MCP registry as io.github.zachhhhh/64types. Free science-based personality test: 64 types from Big Five + HEXACO, with cited profiles. This page covers its hosted endpoint (https://64types.app/api/mcp).

### Is the 64 Types: personality test MCP server safe to use?

64 Types: personality test scores 73 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the 64 Types: personality test MCP server expose?

64 Types: personality test exposes 6 tools: get_test_questions, score_test, get_type_profile, list_types, get_pricing, get_checkout_link. Their descriptions and schemas cost roughly 347 tokens of context every time the server is loaded.

### Does the 64 Types: personality test MCP server require authentication?

No. We connected to 64 Types: personality test without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the 64 Types: personality test MCP server still maintained?

64 Types: personality test is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://64types.app/api/mcp
- Website: https://64types.app/
- Changelog RSS feed: https://verifymcp.io/servers/zachhhhh-64types/api-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/zachhhhh-64types/api-mcp.json
- HTML version of this page: https://verifymcp.io/servers/zachhhhh-64types/api-mcp