"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.

Works With Your AI Assistant

Claude Desktop Cursor Windsurf Claude Code VS Code Copilot Continue Cline Any MCP Client

How It Works

Install once

Add npx mcp-devutils to your AI assistant's MCP config. No sign-up, no account.

Ask naturally

Just ask your AI to "generate a UUID", "decode this JWT", or "format this JSON". It calls the right tool automatically.

Try Pro free

Every pro tool works 3 times before you need a license. No credit card, no sign-up — just try it.

Why mcp-devutils?

No context switching

UUID generators, base64 encoders, JWT decoders — all available without leaving your AI chat. Ask, get result, keep coding.

100% local

Runs as a local process on your machine. Nothing is sent to a server. Your code, keys, and data stay private.

Minimal dependencies

Only requires the MCP SDK and js-yaml. All 45 tools use Node.js built-ins. No bloat, instant startup.

Tool categories

File & encoding, crypto & hashing, dates & time, text transforms, UUID & IDs, HTTP utilities, code formatters, and more.

All 45 Tools — Free vs Pro

16 tools are free forever. 29 pro tools get 3 free uses each — no credit card, no sign-up.

✓ Free Forever (16)

uuid hash base64 timestamp jwt_decode random_string url_encode json_format yaml_json regex_test cron_explain hmac color_convert http_status slug escape_html

⚡ Pro — 3 free tries (29)

semver_compare chmod_calc diff number_base lorem_ipsum word_count cidr case_convert markdown_toc env_parse ip_info password_strength data_size string_escape nanoid csv_json hex_encode char_info byte_count json_diff jwt_create sql_format json_query epoch_convert aes_encrypt aes_decrypt rsa_keygen scrypt_hash regex_replace

How the Trial Works

Install — free, instant

Add npx mcp-devutils to your AI assistant config. All 45 tools appear immediately. No account, no credit card.

Try any pro tool — 3 uses free

Ask your AI to use any of the 29 pro tools. Each individual tool gives you 3 free uses. After each use you'll see the remaining trial count.

Upgrade prompt → $5 one-time

After 3 uses, the tool shows a short upgrade message with a direct Stripe link. Pay $5 once — unlocks all 29 pro tools permanently, no subscription.

🚀 Try these first

"What's the diff between these two JSON configs?" → uses json_diff (pro) — uses 1 of your 3 free tries

"Generate a NanoID for my session token" → uses nanoid (pro) — uses 1 of your 3 free tries

Each prompt uses 1 of the 3 free trial uses for that specific tool. You have 3 free tries per tool — so up to 87 free pro uses total before hitting any limit.

Try Pro free — no sign-up needed

Every pro tool works 3 times without a license. Install, ask your AI to use any pro tool, and see it in action. Love it? Unlock all 29 pro tools permanently for $5 — one-time, no subscription.

Unlock All 45 Tools — $5 View on npm

Install

Claude Desktop (macOS / Windows)

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"]
    }
  }
}

Claude Code (CLI)

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

Unlock Pro — add license key

After purchasing, add your key to the MCP config:

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

Also available as a VS Code extension — same 45 tools, native VS Code sidebar.