## User Authentication

Leverage Auth0's Universal Login to enable AI agents to securely authenticate users.

## Call First-Party APIs on Users' Behalf

Manage tokens to enable AI agents to call first-party APIs on the user's behalf.

## Call Third-Party APIs on Users' Behalf

Connect AI agents to external tools, functions, and services using Token Vault.

## Asynchronous Authorization

Add human-in-the-loop controls for critical or delayed actions using secure protocols like Client-Initiated Backchannel Authentication.

## Authorization for RAG

Use Auth0 Fine-Grained Authorization to enforce document and relationship-level access control in your Retrieval Augmented Generation (RAG) pipelines.