Confusion about filters

Hi!

I’m trying to filter posts by category using:
/wp-json/wp/v2/posts?filter[category]=7 or /wp-json/wp/v2/posts?filter[cat]=7
(category, seems to be the right slug for my taxonomy)
But it wasn’t successful, all posts are returned.

I then saw this post mentioning that filtering may not working.

So I tried to filtering using other parameters, like this:
/wp-json/wp/v2/posts?filter[tag__and][]=3677&filter[tag__and][]=3673
But I’m getting all posts, seems like ?filter param is always ignored.

Am I missing anything here?
Thank you very much.

https://wordpress.org/plugins/rest-api/