# Quick start guide
Learn how to identify your users in just a few steps. See our API reference for detailed information about all the available endpoints and properties.
# Before you start
If you don't have an account already, you need to create a free Signicat account.
# About the integration options
You can integrate with Signicat in two ways, either by connecting to our REST API, or by using OpenID Connect.
# Signicat Express REST API
Our REST API gives you a lot of flexibility and enables options such as headless authentication.
- Headless authentication
- Native mobile app experience for some methods
- Iframe support
- Signicat Express SDKs
# OpenID Connect (OIDC)
Integrate with Signicat through the industry standard for authentication.
- Industry standard being used by some of the biggest players in technology such as Google and Facebook
- Easily available libraries for different languages and frameworks
- End user consent