Package Exports

mcp-devutils
mcp-devutils/index.js

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Readme

mcp-devutils

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

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"]
    }
  }
}

VS Code (Copilot / Continue / Cline)

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

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

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

Buy Pro License ($5) — instant key delivery
Copy your license key from the confirmation page
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

Get Pro ($5) — unlock all 45 tools
Tip via Stripe ($3)

License

MIT