Sadly there are many things that make finding the plugins/mods (jar) ids harder:
- Authors do not provide the id inside the jar, which they can do btw.
- Authors provide author and plugin names in the jar that are different on the spigot post. In this case Autoplug even checks for similarity.
- Authors do not provide direct download links but forward to other html websites. In this case Autoplug provides alternative updating methods like Github/Jenkins.
Autoplugs database contains frequently used ids and metadata that you can find at the bottom of
https://autoplug.one/stats and if you have a premium account that data is fetched and set in your plugin.yml file automatically.