> For the complete documentation index, see [llms.txt](https://docs.facephi.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.facephi.com/docs.facephi-en/products/autenticacion-usuarios-registrados.md).

# Facephi Authentication

### **What does this solution solve?**

It allows a user's identity to be confirmed using only a selfie, performing a liveness check and comparing it with the user's Biometric Template generated during Onboarding.

### **SaaS Integration**

**Required SDKs**

* Frontend SDK (Web or Mobile): face capture
* [Mobile SDK Documentation](/docs.facephi-en/sdks/sdk-mobile.md)
* [Web SDK Documentation](/docs.facephi-en/sdks/sdk-web.md)

**Required backend services (Rest API)**

* Authentication service: `POST /authenticateUser`
  * Performs the liveness check and comparison of the person's face against the stored Biometric Template.
* Service for updating the Biometric Template: `POST /updateUserTemplate`
* [Rest API Documentation](/docs.facephi-en/rest-api/identity-api.md)

### **FAQs**

* How often should the Biometric Template be updated?

At Facephi, the Biometric Template is not updated automatically. As a best practice, it is recommended to review it and possibly update it annually, as well as in specific events that may affect the quality, security, or representativeness of the identity; for this, the service is available `/updateUserTemplate`