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  • License MIT

MCP server with 45 developer utilities (16 free + 29 pro). Free: UUID, hash, HMAC, base64, timestamps, JWT decode, random strings, URL encode/decode, JSON format, YAML/JSON convert, regex test, cron explain, color convert, HTTP status, slugify, HTML escape. Pro: nanoid, hex encode, JWT create, JSON diff/query, CSV/JSON convert, regex replace, semver compare, chmod calc, text diff, number base, lorem ipsum, word/byte count, CIDR calc, case convert, markdown TOC, env parser, IP info, password strength, data size, string escape, char info, SQL format, epoch convert, AES encrypt/decrypt, RSA keygen, scrypt hash. Try every pro tool 3 times free before purchasing

Package Exports

  • mcp-devutils
  • mcp-devutils/index.js

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (mcp-devutils) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

mcp-devutils

npm version npm downloads License: MIT

MCP server with 45 developer utilities for Claude Desktop, Cursor, Windsurf, and any MCP-compatible AI assistant.

3,900+ developers have installed mcp-devutils — join them in seconds.

16 tools free forever + try all 29 pro tools 3 times each — unlock permanently for $5 (one-time).

"Generate a UUID" · "Hash this password with SHA-256" · "Decode this JWT" · "What does 0 15 10 * * ? mean in cron?" · "Convert this JSON to CSV" · "Diff these two configs"

Just ask your AI assistant — mcp-devutils handles it instantly, no browser tabs needed.

Install

Claude Desktop

Add to ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows):

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

Cursor

Add to .cursor/mcp.json in your project or ~/.cursor/mcp.json globally:

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

Windsurf

Add to ~/.codeium/windsurf/mcp_config.json:

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

Claude Code

claude mcp add devutils -- npx -y mcp-devutils

VS Code (Copilot / Continue / Cline)

Add to .vscode/mcp.json in your project:

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

🔓 Try before you buy — Every pro tool works 3 times free, no sign-up needed. Just install and ask your AI assistant to use any pro tool. Love it? Unlock all 29 pro tools permanently for $5 (one-time, no subscription).

Unlock all 45 tools for $5 →

Unlock Pro (29 extra tools) — $5 one-time

  1. Buy Pro License ($5)
  2. Your license key is emailed within 1 hour
  3. Add it to your MCP config:
{
  "mcpServers": {
    "devutils": {
      "command": "npx",
      "args": ["-y", "mcp-devutils"],
      "env": {
        "MCP_DEVUTILS_KEY": "DU.xxxxx.xxxxx"
      }
    }
  }
}

Free Tools (16)

Tool Description
uuid Generate UUID v4 (batch support)
hash Hash text (md5, sha1, sha256)
base64 Encode/decode base64
timestamp Convert Unix ↔ ISO 8601 dates
jwt_decode Decode JWT tokens (header + payload)
random_string Generate random strings/passwords
url_encode URL encode/decode
json_format Pretty-print or minify JSON
yaml_json Convert between YAML and JSON (auto-detects format)
regex_test Test regex patterns with match details
cron_explain Explain cron expressions + next run times
hmac Generate HMAC signatures
color_convert Convert hex ↔ RGB ↔ HSL colors
http_status Look up HTTP status code meanings
slug Generate URL-safe slugs
escape_html Escape/unescape HTML entities
devutils_status Show license status and remaining trial uses

Pro Tools (29)

Tool Description
semver_compare Compare semantic versions
chmod_calc Convert numeric ↔ symbolic permissions
diff Compare two text strings
number_base Convert decimal/hex/octal/binary
lorem_ipsum Generate placeholder text
word_count Count chars, words, lines, bytes
cidr Parse CIDR notation (network, broadcast, hosts)
case_convert Convert camelCase/snake_case/PascalCase/kebab-case
markdown_toc Generate table of contents from markdown
env_parse Parse and validate .env files
ip_info Analyze IP addresses (type, class, private/public)
password_strength Analyze password entropy and strength
data_size Convert between bytes/KB/MB/GB/TB (SI + IEC)
string_escape Escape strings for JSON/CSV/regex/SQL/shell
nanoid Generate compact, URL-safe unique IDs
csv_json Convert between CSV and JSON
hex_encode Hex encode/decode text
char_info Unicode character info (codepoint, UTF-8 bytes, HTML entity)
byte_count Count string bytes in UTF-8/UTF-16/ASCII
json_diff Compare two JSON objects — show added/removed/changed
jwt_create Create HS256 JWT tokens for API testing
sql_format Format SQL queries with proper indentation
json_query Extract values from JSON using dot-notation paths
epoch_convert Convert epoch timestamps across multiple timezones
aes_encrypt AES-256-CBC encrypt text with any key
aes_decrypt Decrypt AES-256-CBC encrypted text
rsa_keygen Generate RSA key pairs (1024/2048/4096-bit)
scrypt_hash Hash passwords with scrypt (RFC 7914)
regex_replace Find & replace with regex + capture groups

Also available as a VS Code extension

Prefer tools in your editor sidebar? DevUtils for VS Code — same 45 tools, native VS Code UI. Works on selected text, activity bar panel, keyboard shortcuts.

Minimal dependencies

Only requires @modelcontextprotocol/sdk and js-yaml. All other tools use Node.js built-ins.

Support

License

MIT