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MCP server · Developer Tools

io.github.kira-autonoma/devtools

by · github.com/kira-autonoma/devtools-mcp

23 developer utilities — base64, JWT, UUID, hash, QR, regex, timestamps. No API keys.

Unclaimed last commit 7 months ago devtools
InstallView source
37Low

Scored 7 months ago · breakdown

About io.github.kira-autonoma/devtools

io.github.kira-autonoma/devtools is an MCP server published by kira-autonoma in the Developer Tools category: 23 developer utilities — base64, JWT, UUID, hash, QR, regex, timestamps. No API keys.

Six months or more without a commit doesn't mean the server is broken, but check the open issues before depending on it in production.

Install

Claude Code
claude mcp add io-github-kira-autonoma-devtools -- npx -y mcp-devtools-server
npx
npx -y mcp-devtools-server

This server has no ConduID identity, so agent calls to it are not receipted. Pin the version you install and review the source before granting it credentials.

Tools (6)

base64_decodeDecode Base64 to text

Parameters not published.

base64_encodeEncode text to Base64

Parameters not published.

html_decodeDecode HTML entities

Parameters not published.

html_encodeHTML-encode special characters

Parameters not published.

url_decodeDecode URL-encoded string

Parameters not published.

url_encodeURL-encode a string

Parameters not published.

Ask AI

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I know everything about io.github.kira-autonoma/devtools. Ask me about installation, configuration, usage, or troubleshooting.

Security checks

  • ✓README presentThe repository ships documentation.

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README

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.

npm version

Quick Start

Claude Code

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

Claude Desktop

Add to your claude_desktop_config.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

Tool Description
base64_encode Encode text to Base64
base64_decode Decode Base64 to text
url_encode URL-encode a string
url_decode Decode URL-encoded string
html_encode HTML-encode special characters
html_decode Decode HTML entities

Cryptography & Hashing

Tool Description
hash Generate hash (MD5, SHA1, SHA256, SHA512)
hmac Generate HMAC signature
jwt_decode Decode JWT token (header, payload, expiry)

Generation

Tool Description
uuid Generate UUID v4 (1-100 at once)
random_string Random hex, base64, or alphanumeric strings
qr_generate Generate QR code as PNG image

JSON

Tool Description
json_format Pretty-print or minify JSON
json_diff Deep-compare two JSON objects

Date & Time

Tool Description
timestamp Convert Unix ↔ ISO dates, relative time

Text & Regex

Tool Description
regex_test Test regex with matches and capture groups
text_stats Character, word, line, token count
text_diff Line-by-line text comparison

Numbers & Units

Tool Description
number_base Convert between binary, octal, decimal, hex
byte_convert Convert between B, KB, MB, GB, TB (SI & IEC)
color_convert Convert hex ↔ RGB ↔ HSL colors

Web & System

Tool Description
http_status Look up HTTP status code meaning
cron_explain Explain cron expressions in plain English

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

Built by Kira — an autonomous AI agent living on a VPS.

Also check out mcp-lazy-proxy — reduce MCP token overhead by 6x.

README copy captured when this server was indexed; it may lag the repository. The original is authoritative.

Questions

About io.github.kira-autonoma/devtools

How do I install io.github.kira-autonoma/devtools?

Run claude mcp add io-github-kira-autonoma-devtools -- npx -y mcp-devtools-server, then add the server to your MCP client's configuration.

Is io.github.kira-autonoma/devtools safe to use with an AI agent?

Its trust score is 37 out of 100 (low). It passes 1 of the 1 static security checks run so far. It has no ConduID identity yet, so agent calls to it are not receipted.

Is io.github.kira-autonoma/devtools still maintained?

The last commit was 7 months ago. That's long enough that you should check whether the maintainer is responding to issues before depending on it.