#apro $AT The abbreviation AT most commonly stands for Access Token, particularly in the context of web security and APIs.

​An Access Token (AT) is a credential that is issued to a client application after a user successfully authenticates. It functions as a digital key, proving that the bearer is authorized to access specific protected resources, such as a user's private data or an API endpoint.

​ATs are typically short-lived and often use the JSON Web Token (JWT) format. They allow secure, stateless authorization without requiring the user to send their password with every single request, greatly enhancing security and system efficiency. They are the core component in authorization frameworks like OAuth 2.0.