mcp-devutils

MCP server with 44 developer utilities for Claude Desktop, Cursor, Windsurf, and any MCP-compatible AI assistant.

15 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

1. Buy Pro License ($5) — instant key delivery
2. Copy your license key from the confirmation page
3. Add it to your MCP config:

{
  "mcpServers": {
    "devutils": {
      "command": "npx",
      "args": ["-y", "mcp-devutils"],
      "env": {
        "MCP_DEVUTILS_KEY": "DU.xxxxx.xxxxx"
      }
    }
  }
}

Free Tools (15)

| 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 | | 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 44 tools, native VS Code UI. Works on selected text, activity bar panel, keyboard shortcuts.

Zero dependencies

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

Support

• Get Pro ($5) — unlock all 44 tools
• Buy me a coffee
• Tip via Stripe ($3)

License

MIT