Laravel Sanctum

Laravel Sanctum is a tool I like mostly because it is pragmatic. Not every application needs a full OAuth solution, an authorization server, and a complex client flow. Often you only need to authenticate your own SPA, a mobile app, or allow a user to create a personal API token for a simple integration.

Sanctum covers exactly those common cases. On one side, it supports token authentication through personal access tokens. On the other, it supports session authentication for first-party SPAs. The important part is knowing which mode your project is using, because each one solves a different problem.

SPA authentication without unnecessary tokens

For a first-party SPA that belongs to the same application or ecosystem, Sanctum usually does not rely on bearer tokens stored in the frontend. It uses Laravel session authentication, cookies, and CSRF protection. That is a good thing, because frontend tokens add risk when they are not truly needed.

In practice, this means an application can have a modern frontend while still relying on familiar Laravel mechanisms. You do not need to reach for OAuth automatically just because the interface is an SPA. If the client is part of your own application, session-based authentication can be simpler and safer.

API tokens for simple integrations

The second part of Sanctum is API token management. A user can create a token and send it in the Authorization header as a bearer token. Tokens can have abilities, which limit what they are allowed to do. That is useful for personal access, internal scripts, simple integrations, and admin tools.

It is important not to underestimate that simplicity. A token is still an access key to the application. It needs a clear purpose, reasonable permissions, revocation, and in more sensitive projects a thoughtful expiration policy. Sanctum provides the mechanism, but the security rules still belong to the developer.

When Sanctum is enough

Sanctum makes sense in applications that do not need a full OAuth ecosystem. If you are dealing with your own SPA, a mobile app, or simple user API tokens, it is often more direct than heavier alternatives. It adds just enough infrastructure for common Laravel projects.

If you are building a public platform for third-party developers, need complex OAuth grants, external clients, and detailed application management, Sanctum may no longer be the right tool. At that point, it is better to use a solution designed specifically for full OAuth workflows.

What to watch out for

The most common problem with Sanctum is not being clear about which authentication mode is in use. SPA authentication and API tokens are not the same thing. When those worlds are mixed without a clear design, issues appear around CORS, cookies, CSRF protection, or unnecessarily exposed tokens.

Used correctly, Sanctum is very practical. It lets you stay with a simple Laravel solution that covers many everyday needs. It is not a universal security layer for everything, but for first-party SPAs and simple tokens it often gives the right balance of simplicity and control.