pkg-availability is a CLI too for checking npm package name availability. I wrote it as a weekend project to help easen the daunting process of searching for package names one by one on npm. With this tool, I just paste in a list of names and it does the checking. It then outputs a pretty list with details on the availability of each package name.
To start using this tool, install it with npm follows:
npm i -g pkg-availibity
You could also install via yarn:
yarn global add pkg-availibity
Just feed it a list of names:
npm run pkg-availibity lodash react foo-pkg
yarn pkg-availibity bar=tools react my-next-pkg