> For the complete documentation index, see [llms.txt](https://gitbook.humanode.io/oauth2-service/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://gitbook.humanode.io/oauth2-service/overview.md).

# Overview

## About Humanode OAuth 2 Service

It is an easy-to-integrate way to add Sybil-resistance to your apps and dapps!

Sybil-resistant applications are not subject to multi-account attacks. You can make sure that there is only one person behind the account in your platform.

Humanode OAuth 2 Service use OAuth 2 + OpenID Connect protocols which are common and widespread. More information about protocols you can get here:

{% content-ref url="/pages/vk2MUkytOyJAb70Q3k7s" %}
[OAuth 2](/oauth2-service/oauth-2/what-is-oauth-2.md)
{% endcontent-ref %}

Integration guides can be found here:

{% content-ref url="/pages/BgsroiBbXMb4BWeWuV36" %}
[Guides](/oauth2-service/guides/quick-start.md)
{% endcontent-ref %}

Information about OAuth 2 Service environment is here:

{% content-ref url="/pages/H3UVVpdoPYpfLF2xckiN" %}
[Environments](/oauth2-service/environments/staging-environment.md)
{% endcontent-ref %}