---
title: Back-channel
sidebar_custom_props:
    termName: Back-channel
    tags:
        - Protocols
    shortDescription: Direct server-to-server communication.
    longDescription: Server-to-server interactions without user-agent involvement, e.g., token exchange at the token endpoint, introspection, revocation, or back-channel logout. More reliable for session coordination and avoids browser constraints.
---
