Access Tokens are used in token-based authentication to allow an application to access an API. The application receives an Access Token after a user successfully authenticates and authorizes access, then passes the Access Token as a credential when it calls the target API. The passed token informs the API that the bearer of the token has been authorized to access the API and perform specific actions specified by the scope that was granted during authorization.
Access Token Structure
Auth0 issues Access Tokens in two formats: opaque and JSON Web Token (JWT).
In addition, if you have chosen to allow users to log in through an Identity Provider (IdP), such as Facebook, the IdP will issue its own Access Token to allow your application to call the IDP's API. For example, if your user authenticates using Facebook, the Access Token issued by Facebook can be used to call the Facebook Graph API. These tokens are controlled by the IdP and can be issued in any format. To learn more, see Identity Provider (IdP) Access Tokens.
Opaque Access Tokens
Opaque Access Tokens are tokens whose format you cannot access. Opaque Access Tokens issued by Auth0 can be used with the
/userinfo endpoint to return a user's profile.
To learn more about getting an opaque Access Token for the
userinfo endpoint, see Get Access Tokens.
JSON Web Token Access Tokens
Access Tokens issued for the Auth0 Management API and Access Tokens issued for any custom API that you have registered with Auth0 will follow the JSON Web Token (JWT) standard, which means that their basic structure conforms to the typical JWT Structure, and they contain standard JWT Claims asserted about the token itself.
To learn more about getting a JWT Access Token for the Management API or your own custom API, see Get Access Tokens.
Access Token Security
Access Token Lifetime
By default, an Access Token for a custom API is valid for 86400 seconds (24 hours). We recommend that you set the validity period of your token based on the security requirements of your API. For example, an Access Token that accesses a banking API should expire more quickly than one that accesses a to-do API.
To learn how to change the Access Token expiration time, see Update Access Token Lifetime.
Access Tokens issued strictly for the purpose of accessing the OpenID Connect (OIDC) /userinfo endpoint have a default lifetime and can't be changed. The length of lifetime depends on the flow used to obtain the token:
|Implicit||7200 seconds (2 hours)|
|Authorization Code/Hybrid||86400 seconds (24 hours)|