How to get list of plugins via Web API?

I would like to know what specific endpoint the Roblox Studio Toolbox uses to get a list of plugins.

I’ve tried using the following URL, because category 7 means plugins according to another URL, but it returns an error instead.

https://catalog.roblox.com/v1/search/items?category=7&limit=50

Result:

Nevermind. I found what I need.