We have 3 different session types that both users and applications can use and see. This is a short summery of each type and what they are used for.
Session: Sessions are web sessions for the official app. This session is the type you are using at this exact moment to view this page.
API: API keys give applications access to your account. This can include a third party client or something like a tool or bot.
Login: Login sessions only let an application ask us basic info about you like your name and avatar. This is so you can login to other services via your Hey.Café account.