npm-exists check if a package exists on npm Getting Started Install: npm install npm-exists --save Usage: const exists = require('npm-exists'); exists('request') .then(moduleExists => { if (moduleExists) { console.log('gosh, `request` name already taken!'); } else { console.log('you can register `request`'); } }); // use custom registry:exists('request', 'http://localhost:5432/') .then(moduleExists => { console.log(moduleExists); }); License MIT © 2016, Andrea Parodi