# io.github.brentspore/buildutilities-mcp (npm · buildutilities-mcp)

Deterministic dev utilities: UUIDs, hashes, encoding, JWT, cron, regex. No network, no API key.

- Trust score: 79/100 (medium)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-24

## Components

- npm · `buildutilities-mcp`: 79/100 (this document), [markdown](https://verifymcp.io/servers/brentspore-buildutilities-mcp/buildutilities-mcp.md), [page](https://verifymcp.io/servers/brentspore-buildutilities-mcp/buildutilities-mcp)

## Channel facts

- Registry: `npm`
- Package: `buildutilities-mcp`
- Version: `0.1.2`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, 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 2026-09-24.

- **Supply Chain Security**: 98/100
  - No malware found by supply-chain analysis.
  - No known CVEs affecting this package version or its production dependencies.
  - No install/post-install scripts declared.
  - 31 of 96 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 45/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 15 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 77/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 1641 tokens (~82/item across 20 items; 20 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 77/100
  - Stability observed for 23 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 79/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 38% 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 20 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 21 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the io.github.brentspore/buildutilities-mcp server?

io.github.brentspore/buildutilities-mcp runs locally as an npm package, launched with npx -y buildutilities-mcp. 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 brentspore-buildutilities-mcp -- npx -y buildutilities-mcp
```

### Cursor

```json
{
  "mcpServers": {
    "brentspore-buildutilities-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "buildutilities-mcp"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "brentspore-buildutilities-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "buildutilities-mcp"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add brentspore-buildutilities-mcp -- npx -y buildutilities-mcp
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "brentspore-buildutilities-mcp": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "buildutilities-mcp"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add brentspore-buildutilities-mcp --command npx --arg -y --arg buildutilities-mcp
```

### Hermes

```yaml
mcp_servers:
  brentspore-buildutilities-mcp:
    command: "npx"
    args: ["-y", "buildutilities-mcp"]
```

### Netclaw

```json
{
  "McpServers": {
    "brentspore-buildutilities-mcp": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "buildutilities-mcp"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add brentspore-buildutilities-mcp -t stdio -c npx -a -y buildutilities-mcp
```

### Other

```json
{
  "mcpServers": {
    "brentspore-buildutilities-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "buildutilities-mcp"
      ]
    }
  }
}
```

## 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.

### 2026-09-23 (score 79, +1)

No change was recorded against any check on this day. Stability & Change Management went from 70 to 73. That category is still filling its 30-day observation window: 21 days of observed history at the previous scan, 22 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-21 (score 78, +1)

No change was recorded against any check on this day. Stability & Change Management went from 63 to 67. That category is still filling its 30-day observation window: 19 days of observed history at the previous scan, 20 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-18 (score 77, +1)

No change was recorded against any check on this day. Stability & Change Management went from 53 to 57. That category is still filling its 30-day observation window: 16 days of observed history at the previous scan, 17 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-16 (score 76, +1)

No change was recorded against any check on this day. Stability & Change Management went from 47 to 50. That category is still filling its 30-day observation window: 14 days of observed history at the previous scan, 15 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-14 (score 75, +1)

No change was recorded against any check on this day. Stability & Change Management went from 40 to 43. That category is still filling its 30-day observation window: 12 days of observed history at the previous scan, 13 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-12 (score 74, +1)

No change was recorded against any check on this day. Stability & Change Management went from 33 to 37. That category is still filling its 30-day observation window: 10 days of observed history at the previous scan, 11 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-10 (score 73, +1)

No change was recorded against any check on this day. Stability & Change Management went from 27 to 30. That category is still filling its 30-day observation window: 8 days of observed history at the previous scan, 9 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-09 (score 72, +9)

- [security regression] Tool safety: pass → unverified
- [security improvement] Source repository: fail → pass
- [security] Stability: Stability not yet verified: we do not have a sandbox capture of the MCP schema this version of the package serves yet.
- [functional regression] Security disclosure: unverified → fail
- [functional regression] Capabilities: pass → unverified
- [functional regression] Tool coverage: 100 → unverified
- [functional improvement] Stability: unverified → 0.27
- [functional] First check of Schema quality: unverified
- [functional] Schema quality: excellent → good
- [functional] Package version: 0.1.0 → 0.1.2
- [functional] Package version: 0.1.0 → 0.1.1

## MCP tools (20)

### `generate_uuid` (~76 tokens)

Generate UUID

Generate cryptographically random UUID v4 identifiers. Use this instead of writing a UUID yourself — model-authored UUIDs are not random and repeat across sessions. Web version: https://buildutilities.com/uuid-generator

Input parameters:

- `count` (integer): How many UUIDs to generate
- `uppercase` (boolean): Return them uppercased

### `generate_password` (~126 tokens)

Generate Password

Generate a cryptographically random password. Guarantees at least one character from every enabled set. Use this rather than inventing a password — model-authored ones are guessable. Web version: https://buildutilities.com/password-generator

Input parameters:

- `count` (integer): How many passwords
- `digits` (boolean)
- `excludeAmbiguous` (boolean): Drop characters that look alike: l 1 I O 0 o
- `length` (integer): Characters in each password
- `lowercase` (boolean)
- `symbols` (boolean)
- `uppercase` (boolean)

### `generate_token` (~75 tokens)

Generate Random Token

Generate a cryptographically random token — API keys, session ids, nonces, salts. Choose hex, base64url or alphanumeric encoding. Web version: https://buildutilities.com/random-string-generator

Input parameters:

- `bytes` (integer): Bytes of entropy before encoding
- `count` (integer)
- `encoding` (string)

### `base64_encode` (~65 tokens)

Base64 Encode

Encode text to Base64. Set urlSafe for the URL/filename-safe alphabet (-_ instead of +/, no padding). Web version: https://buildutilities.com/base64-codec

Input parameters:

- `text` (string, required): Text to encode
- `urlSafe` (boolean)

### `base64_decode` (~62 tokens)

Base64 Decode

Decode Base64 (standard or URL-safe) back to text. Reports whether the input was valid rather than returning mojibake. Web version: https://buildutilities.com/base64-codec

Input parameters:

- `encoded` (string, required): Base64 or base64url input

### `url_encode` (~58 tokens)

URL Encode

Percent-encode text. component mode escapes & = ? / for use inside a query value; uri mode preserves them. Web version: https://buildutilities.com/url-codec

Input parameters:

- `mode` (string)
- `text` (string, required)

### `url_decode` (~33 tokens)

URL Decode

Decode percent-encoded text. Web version: https://buildutilities.com/url-codec

Input parameters:

- `text` (string, required)

### `hash_text` (~86 tokens)

Hash Text

Compute a cryptographic digest of text. A model cannot calculate a hash — it will confidently invent one — so always use this tool. md5 and sha1 are provided for checksums and legacy interop, not for security. Web version: https://buildutilities.com/hash-generator

Input parameters:

- `algorithm` (string)
- `encoding` (string)
- `text` (string, required)

### `hmac_sign` (~68 tokens)

HMAC Sign

Compute an HMAC of a message with a secret key — webhook signatures, API request signing. Web version: https://buildutilities.com/hmac-generator

Input parameters:

- `algorithm` (string)
- `encoding` (string)
- `message` (string, required)
- `secret` (string, required)

### `hmac_verify` (~74 tokens)

HMAC Verify

Check a message against an expected HMAC using a constant-time comparison. Use this to validate an inbound webhook signature rather than comparing strings yourself.

Input parameters:

- `algorithm` (string)
- `message` (string, required)
- `secret` (string, required)
- `signature` (string, required): The signature to check, hex or base64

### `convert_timestamp` (~96 tokens)

Convert Timestamp

Convert between Unix epoch and human-readable time, in any IANA timezone. Auto-detects seconds vs milliseconds. Use this rather than doing the arithmetic in your head. Web version: https://buildutilities.com/timestamp-converter

Input parameters:

- `timeZone` (string): IANA timezone, e.g. "America/New_York"
- `value` (string, required): Epoch seconds/ms, an ISO 8601 string, or "now"

### `cron_next_runs` (~127 tokens)

Cron Next Runs

Parse a standard 5-field cron expression and list its next run times in a timezone. Handles the Vixie rule that day-of-month and day-of-week are OR'd when both are restricted — the case models most often get wrong. Rejects non-standard syntax (L, W, #) rather than guessing. Web version: https://buildutilities.com/cron-expression-generator

Input parameters:

- `count` (integer)
- `expression` (string, required): e.g. "*/15 9-17 * * mon-fri" or "@daily"
- `timeZone` (string)

### `format_json` (~99 tokens)

Format or Minify JSON

Pretty-print or minify JSON exactly, with precise error location when it is invalid. Prefer this to reformatting a large document yourself — it cannot drop or alter a value. Web version: https://buildutilities.com/json-formatter

Input parameters:

- `indent` (integer)
- `json` (string, required): The JSON text
- `mode` (string)
- `sortKeys` (boolean): Sort object keys — useful for diffing two payloads

### `decode_jwt` (~93 tokens)

Decode JWT

Decode a JSON Web Token's header and payload and report expiry. This DECODES ONLY — it does not verify the signature, so never treat the contents as trusted on the strength of this output. Models asked to read a JWT tend to invent its claims; this reads them. Web version: https://buildutilities.com/jwt-decoder

Input parameters:

- `token` (string, required): The JWT, optionally prefixed with 'Bearer '

### `diff_text` (~75 tokens)

Diff Text

Line-by-line diff of two texts, marking - removed and + added. Use it to check exactly what changed between two versions instead of eyeballing them. Web version: https://buildutilities.com/text-diff-checker

Input parameters:

- `after` (string, required)
- `before` (string, required)
- `ignoreWhitespace` (boolean)

### `test_regex` (~110 tokens)

Test Regular Expression

Actually execute a regular expression against text and return every match with its index and capture groups. Use this instead of predicting what a pattern matches — reasoning about a regex is not the same as running it. Web version: https://buildutilities.com/regex-tester

Input parameters:

- `flags` (string): Regex flags, e.g. gi, gm, gs
- `maxMatches` (integer)
- `pattern` (string, required): The pattern, without delimiters
- `text` (string, required): Text to search

### `escape_regex` (~31 tokens)

Escape Regex Literal

Escape a string so it can be used as a literal inside a regular expression.

Input parameters:

- `text` (string, required)

### `analyze_text` (~60 tokens)

Analyze Text

Exact counts for a text: characters, words, lines, sentences, paragraphs, bytes. Use this rather than estimating — counting long text is a classic model failure. Web version: https://buildutilities.com/word-counter

Input parameters:

- `text` (string, required)

### `slugify` (~58 tokens)

Slugify

Turn text into a URL-safe slug, transliterating accents and collapsing separators. Web version: https://buildutilities.com/slug-generator

Input parameters:

- `maxLength` (integer)
- `separator` (string)
- `text` (string, required)

### `check_color_contrast` (~99 tokens)

Check Colour Contrast

Compute the exact WCAG 2.2 contrast ratio between two colours and report which AA/AAA thresholds it passes. This is a specific formula, not a judgement call — do not estimate it. Web version: https://buildutilities.com/color-contrast-checker

Input parameters:

- `background` (string, required): Hex colour, e.g. #ffffff
- `foreground` (string, required): Hex colour, e.g. #1a1a1a

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/brentspore-buildutilities-mcp/buildutilities-mcp#diagnostics

## Score history

- 2026-09-24: 79
- 2026-09-23: 79
- 2026-09-22: 78
- 2026-09-21: 78
- 2026-09-20: 77
- 2026-09-19: 77
- 2026-09-18: 77
- 2026-09-17: 76
- 2026-09-16: 76
- 2026-09-15: 75
- 2026-09-14: 75
- 2026-09-13: 74
- 2026-09-12: 74
- 2026-09-11: 73
- 2026-09-10: 73
- 2026-09-09: 72
- 2026-09-08: 63
- 2026-09-07: 63
- 2026-09-06: 63
- 2026-09-05: 63
- 2026-09-04: 63
- 2026-09-03: 63
- 2026-09-02: 63
- 2026-09-01: 63

## Common questions

### What is the io.github.brentspore/buildutilities-mcp server?

io.github.brentspore/buildutilities-mcp is listed in the public MCP registry as io.github.brentspore/buildutilities-mcp. Deterministic dev utilities: UUIDs, hashes, encoding, JWT, cron, regex. No network, no API key. This page covers its npm package (buildutilities-mcp).

### Is the io.github.brentspore/buildutilities-mcp server safe to use?

io.github.brentspore/buildutilities-mcp scores 79 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 24 September 2026. It declares no install or post-install scripts. 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 io.github.brentspore/buildutilities-mcp server expose?

io.github.brentspore/buildutilities-mcp exposes 20 tools: generate_uuid, generate_password, generate_token, base64_encode, base64_decode, and 15 more. Their descriptions and schemas cost roughly 1,571 tokens of context every time the server is loaded.

### Is the io.github.brentspore/buildutilities-mcp server still maintained?

io.github.brentspore/buildutilities-mcp is still listed as active in the MCP registry. We last reached this channel on 24 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

### What licence is the io.github.brentspore/buildutilities-mcp server under?

io.github.brentspore/buildutilities-mcp declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.

## Links

- npm package: https://www.npmjs.com/package/buildutilities-mcp
- Socket report: https://socket.dev/npm/package/buildutilities-mcp
- Repository: https://github.com/brentspore/buildutilities-mcp
- Website: https://buildutilities.com/
- Changelog RSS feed: https://verifymcp.io/servers/brentspore-buildutilities-mcp/buildutilities-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/brentspore-buildutilities-mcp/buildutilities-mcp.json
- HTML version of this page: https://verifymcp.io/servers/brentspore-buildutilities-mcp/buildutilities-mcp