BuddyPress.org

Old post, but I think the behavior you see is WP-driven. The reason I say that is that I have disabled the REST API for WordPress and the link above (e.g. /wp-json/buddypress/v1/members/3) or similar do not retrieve any data.

I used guidance from this SO article.

https://stackoverflow.com/questions/41191655/safely-disable-wp-rest-api