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Devutils MCP Server

by paladini

Runs local developer utilities for hashing, encoding, generation, parsing, conversion, and network calculations through MCP.

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Install Devutils MCP Server

Pick your client, then add it in one click or paste the config.

STDIONode.js
~/Library/Application Support/Claude/claude_desktop_config.json
claude_desktop_config.json
{
  "mcpServers": {
    "paladini-devutils-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "devutils-mcp-server"
      ]
    }
  }
}

Settings → Developer → Edit Config, merge this into mcpServers, then fully quit and reopen Claude Desktop.

Install not yet sandbox-tested— the server itself is confirmed live (we called its tools/list endpoint). The stdio install command is a separate, ongoing check.

Overview

paladini/devutils-mcp-server exposes local developer utilities to MCP-compatible AI assistants without external APIs or authentication. Its tools cover hashing, encoding, ID and password generation, JWT inspection, JSON handling, conversions, and IP or CIDR calculations. It runs as a standard stdio process through npx, npm, or Docker, making it suitable for assistants that need quick, local data transformations and debugging helpers.

Use cases

  • Hash passwords or strings with standard digest and bcrypt tools
  • Encode and decode values for URLs, HTML, Base64, or hexadecimal formats
  • Generate UUIDs, NanoIDs, passwords, and random hexadecimal identifiers
  • Inspect JWT contents and validate token structure or expiration
  • Calculate CIDR ranges and classify IP addresses

Key features

  • MD5, SHA, and bcrypt hashing
  • Base64, URL, HTML, and hexadecimal encoding
  • UUID, NanoID, password, and random hex generation
  • JWT decoding and structural validation
  • JSON formatting, validation, and path queries
  • Timestamp, base, color, byte, CIDR, and IP utilities

Tools36

What Devutils MCP Server lets your agent do. Expand a tool for its parameters.

Verified live~3.3k tokens of context

Security & health

What it can reach and how reliably it runs — from our own checks, not the maintainer’s claims.

ActiveLast checked Today

Recent health check succeeded.

7/7 checks healthy over the last 86d

Supply-chain signal

No high-severity advisories surfaced by our automated scan.

Critical 0High 0Medium 0Low 0

Scanned 2d ago via OSV.dev · devutils-mcp-server (npm)

Adoption & maintenance

Factual signals from GitHub, npm, and our automated checks — not a rating.

GitHub stars5Stargazers on the source repository.
npm downloads160Package downloads in the last 30 days.
Last commit3mo agoMost recent push to the default branch.
Tools exposed36Callable tools this server registers over MCP.
Directory activity2 viewsConfig copies, upvotes, and views on AllMCPs.

How Devutils MCP Server works

What paladini/devutils-mcp-server does

paladini/devutils-mcp-server provides a collection of local utilities through the Model Context Protocol. It is intended for MCP-compatible assistants that need to perform common developer operations without calling an external service.

Hashing tools cover MD5, SHA-1, SHA-256, SHA-512, and bcrypt. Bcrypt verification is also available for checking a string against an existing bcrypt hash. Encoding tools handle Base64, URL percent-encoding, HTML entities, and hexadecimal values in both directions.

Generation tools create UUID v4 values, NanoIDs, configurable passwords, and random hexadecimal strings. JWT tools decode the header and payload or validate token structure, Base64URL encoding, JSON validity, and expiration status. JWT validation does not verify a cryptographic signature.

How it works

The server communicates with an MCP client over stdio. An assistant selects a named tool and supplies its inputs, while the local process returns the calculated or generated result. No API credentials or service-specific account are listed as prerequisites.

JSON tools can pretty-print or minify JSON, report parsing errors, and retrieve values through dot-notation paths such as user.address.city or items[0].name. Conversion tools handle Unix timestamps and dates, numeric bases from 2 through 36, HEX/RGB/HSL colors, and byte units using binary or SI standards. Network tools calculate CIDR details and classify IPv4 or IPv6 addresses.

Setup and configuration

paladini/devutils-mcp-server requires Node.js 18 or newer; the README recommends Node.js 22. The simplest launch command is npx -y devutils-mcp-server. It can also be installed globally with npm and started as devutils-mcp-server, or run in Docker with the published image or a locally built image.

For a stdio client, configure the command as npx with -y and devutils-mcp-server as arguments. The README provides configuration examples for Claude Desktop, Cursor, VS Code, and Windsurf. Cursor and Claude Code also have an optional plugin installation path. The project is additionally listed in the official MCP Registry and on Smithery.

Tools and capabilities

  • Hash strings with MD5, SHA-1, SHA-256, SHA-512, or bcrypt.
  • Verify bcrypt hashes.
  • Encode and decode Base64, URLs, HTML entities, and hexadecimal strings.
  • Generate UUID v4 values, NanoIDs, passwords, and random hexadecimal data.
  • Decode and structurally validate JWTs without signature verification.
  • Format, minify, validate, and query JSON.
  • Convert timestamps, dates, number bases, colors, and byte units.
  • Calculate CIDR network information and validate or classify IP addresses.

Limitations and notes

The tools operate locally and do not provide cryptographic JWT signature verification. JWT decoding exposes token contents but does not establish trust.

Read the full README View source on GitHub

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Frequently Asked Questions about Devutils MCP Server

paladini/devutils-mcp-server is an MCP server that connects MCP-compatible AI assistants to local developer utilities. Its main tools hash and verify strings, encode data, generate IDs and passwords, inspect JWTs, format and query JSON, convert timestamps and values, and calculate or classify network addresses without external APIs.

Run `npx -y devutils-mcp-server` with Node.js 18 or newer. You can also install it globally with `npm install -g devutils-mcp-server`, run it in Docker, or use the provided Cursor, VS Code, Claude Code, or Smithery installation options.

Yes, paladini/devutils-mcp-server works with Cursor through the one-click MCP install, a manual stdio configuration, or the optional DevUtils Cursor plugin. The manual configuration runs `npx -y devutils-mcp-server`.

No, paladini/devutils-mcp-server does not verify JWT cryptographic signatures. Its JWT tools decode the header and payload and validate token structure, Base64URL encoding, JSON validity, and expiration status.

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