9 Developer Utilities You Can Add to Claude Desktop in 30 Seconds

You're in the middle of debugging. You need a UUID. Or you need to decode a JWT. Or you need to hash something. You alt-tab to a browser, find an online tool, paste your data into someone else's server, and hope it's not being logged. There's a better way. mcp-devutils is a free, open-source MCP server that gives Claude Desktop (or Cursor, or any MCP client) 9 developer tools — running locally on your machine. What You Get Tool What It Does uuid Generate 1-10 UUIDs hash MD5, SHA1, SHA256 hashing base64 Encode/decode base64 timestamp Convert Unix ↔ ISO 8601 jwt_decode Decode JWT payload (no verification) random_string Generate passwords, API keys, hex strings url_encode URL encode/decode json_format Pretty-print or minify JSON regex_test Test regex patterns with match details Setup: 30 Seconds Claude Desktop Add this to your claude_desktop_config.json : { "mcpServers" : { "devutils" : { "command" : "npx" , "args" : [ "-y" , "mcp-devutils" ] } } } Restart Claude Desktop. Done. No global