# Callback Service (Push)

Users can provide Rekor with a REST API endpoint to seamlessly retrieve incident data as soon as they are created in Rekor Command™.

The data includes a list of active Incidents [customized](https://docs.rekor.ai/command-intelligence-services/overview#customizations) based on user preferences.

## Authentication

The supported authentication methods of the Incidents Callback Service are:

1. **Basic Authentication** - using a *Username* and *Password*&#x20;
2. **OAuth2** - using a *JSON Web Token* (*JWT*)&#x20;