# Votes, Reactions, Bookmarks, Notes & Polls Lightweight engagement actions. The vote/reaction/bookmark POST endpoints here are **toggles** - sending the same action again removes it. They return JSON when called with `X-Requested-With: fetch` (sent automatically by the panels below); the [Conventions & Errors](/docs/conventions.html) page explains that header rule and the response envelope. Personal notes are private, per-user annotations attached to a piece of content - only you can ever see your own notes. Every endpoint follows the shared [Conventions & Errors](/docs/conventions.html) (auth, content negotiation, pagination, status codes); see [Authentication](/docs/authentication.html) for the four ways to sign requests.