Do I have to bind the <Plug>RestNvim to a shortcut to have trigger the call?

[LintaoAmons]

Because I actually want to type the command in command mode to trigger the call, but it seems that the <plug>RestNvim wont work if I type :<Plug>RestNvim<CR>

[NTBBloodbath]

Hi, that's right. rest.nvim is currently using <Plug> mappings which according to the docs (:h using-<Plug>) are used to avoid that mappings of typed keys interfere with mappings that are only to be used from other mappings.

The only way of using it is through user-defined mappings. That is going to change in the upcoming version tho :)

[LintaoAmons]

Got, please add some commands to use~

[NTBBloodbath]

Oh yup, there will be a :Rest command in the upcoming version!

See the Rest command section of my blog post for more information :)

[boltlessengineer]

Closing this discuession as rest.nvim now have :Rest command for general operations.
<plug> is deprecated and removed from v3 release.