> ## Documentation Index
> Fetch the complete documentation index at: https://polar.sh/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction

> For partners building services and extensions for Polar customers

### OpenID Connect (OAuth2)

Only use our **OpenID Connect** in case you want to act on the behalf of other users via our API, e.g building an app/service for Polar customers. Otherwise, always use an **Organization Access Token (OAT)** to integrate Polar for your own service.

Polar implements the [OpenID Connect specification](https://openid.net/developers/how-connect-works/) to enable third-party authentication. It's a layer on top of the OAuth2 framework aiming at making integration more standard and predictable.

In particular, it comes with a **discovery endpoint** allowing compatible clients to automatically work with the OpenID Connect server. Here is Polar's one:

[OpenID Configuration](https://api.polar.sh/.well-known/openid-configuration)