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Devtools MCP server

by kira-autonoma·io.github.kira-autonoma/devtools·v1.0.1
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23 developer utilities — base64, JWT, UUID, hash, QR, regex, timestamps. No API keys.

B72/100grade B
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B72/100

full report

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New

0 stars41 downloads/wk

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Devtools tools (23)

write = sends, deletes, buys or posts

Read from the package source without running it. The installed server may list more.

  • base64_decode

    Decode Base64 to text

  • base64_encode

    Encode text to Base64

  • byte_convert

    Convert between byte units (B, KB, MB, GB, TB)

  • color_convert

    Convert between hex, RGB, and HSL color formats

  • cron_explain

    Explain what a cron expression means in human-readable terms

  • hash

    Generate a hash of the input text. Supports md5, sha1, sha256, sha512

  • hmac

    Generate HMAC of the input text

  • html_decode

    Decode HTML entities to plain text

  • html_encode

    HTML-encode special characters

  • http_status

    Look up HTTP status code meaning

  • json_diff

    Compare two JSON objects and show differences

  • json_format

    Pretty-print or minify JSON

  • jwt_decode

    Decode a JWT token without verification. Shows header, payload, and expiration status

  • number_base

    Convert a number between bases (binary, octal, decimal, hex)

  • qr_generate

    Generate a QR code from text or URL. Returns a data URI (base64 PNG image)

  • random_string

    Generate a random string (hex, alphanumeric, or bytes)

  • regex_test

    Test a regex pattern against text. Returns matches and capture groups

  • text_diff

    Compare two text strings line-by-line

  • text_stats

    Count characters, words, lines, and analyze text

  • timestamp

    Convert between Unix timestamps and ISO dates, or get the current time

  • url_decode

    Decode a URL-encoded string

  • url_encode

    URL-encode a string

  • uuid

    Generate a UUID (v4 random)

Public scan report

scanner v0.1.10 · 2026-09-27 · same rubric, same numbers if you re-run it

no findings
  • Code scan3 source files scanned25/25
  • –Live reliabilityno gateway calls yet and no remote to proben/a
  • –Tool poisoningtools not inspected (local package is not executed); not countedn/a
  • Auth qualitylocal package, no credentials required12/15
  • Maintenancelast push 193 days ago4/15
  • Maintainer identityregistry namespace matches repository owner6/10
Overall 72/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

Install Devtools in Claude Code, Cursor or VS Code

Runs npx -y mcp-devtools-server on your machine. Read the scan report first; the gateway never runs local packages.

claude mcp add devtools -- npx -y mcp-devtools-server
Add to Cursor

What the publisher says

From the Devtools repository's README, as published. We do not edit it. Read it on GitHub

devtools-mcp 🛠️

Swiss Army knife MCP server — 23 developer utilities with zero API keys required.

Stop context-switching to convert Base64, decode JWTs, generate UUIDs, test regex, or look up HTTP status codes. mcp-devtools-server puts all these tools directly in your AI assistant.

Quick Start

Claude Code

claude mcp add devtools -- npx mcp-devtools-server

Claude Desktop

Add to your claudedesktopconfig.json:

{
  "mcpServers": {
    "devtools": {
      "command": "npx",
      "args": ["devtools-mcp"]
    }
  }
}

Cursor / VS Code

Add to .cursor/mcp.json or VS Code MCP settings:

{
  "servers": {
    "devtools": {
      "command": "npx",
      "args": ["devtools-mcp"]
    }
  }
}

No API keys. No configuration. Just works.

23 Tools Included

Encoding & Decoding

Cryptography & Hashing

Generation

JSON

Date & Time

Text & Regex

Numbers & Units

Web & System

Examples

Ask your AI assistant:

  • "Decode this JWT token: eyJhbG..."
  • "What's the SHA256 hash of 'hello world'?"
  • "Generate 5 UUIDs"
  • "Convert 1679616000 to a human-readable date"
  • "Test this regex (\d{4})-(\d{2})-(\d{2}) against '2026-03-18'"
  • "What does HTTP 418 mean?"
  • "Convert #ff6b35 to RGB and HSL"
  • "Generate a QR code for https://example.com"
  • "What does /5 * mean as a cron schedule?"
  • "How many tokens is this text?"

Why devtools-mcp?

  • Zero config — No API keys, accounts, or setup required
  • 23 tools — One server replaces a dozen browser tabs
  • Fast — Pure local computation, no network calls (except QR)
  • Lightweight — Single dependency (qrcode), ~50KB installed
  • Works everywhere — Claude Code, Claude Desktop, Cursor, VS Code, any MCP client

Development

git clone https://github.com/kira-autonoma/devtools-mcp.git
cd devtools-mcp
npm install
npm run build
npm start

Support This Project

If you find this useful, consider supporting development:

Solana: 9RiJ4ViR4URQ7sDuCMz4bLjS2C1VT3BFHJ9SQakxHqF

GitHub Sponsors: github.com/sponsors/kira-autonoma

Shortened. The full README is on GitHub.

Nothing above is checked by us. What we check is on the safety report.

Devtools: common questions

Is Devtools MCP server safe?
Mostly: it is graded B (72/100). Read the Devtools safety report
How do I install Devtools?
It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does Devtools need an API key?
Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is Devtools maintained?
The last commit was 209 days ago (2026-03-18). The latest release is v1.0.1.

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