If you inspect the network traffic for the plugin page you can see that the plugin API is publicly available from https://api.inkdrop.app/v1/packages, it does however require you to page in order to get packages. If you want to use it in your CLI, for example https://api.inkdrop.app/v1/packages?page=0&sort=majority gets you the first page of the most popular plugins.
Yes, you can retrieve a list of plugins via the API @Magnus mentioned.
It’s completely fine that you use it for your hack!
But please be kind to my servers since you sent a massive amount of requests at once two days ago