# Authentication

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Requests to the Zoom API are authenticated through a Bearer token in an Authorization header.

**cURL sample**

```shell
curl -H "Authorization: Bearer YOUR_ACCESS_TOKEN" https://api.zoom.us/v2/users/me
```

## Choosing the right authentication method

-   Use **OAuth 2.0 for apps that need user authorization** and for all apps that publish on the Zoom App Marketplace.
-   Use **server-to-server OAuth for backend services on your own account** that don't require user interaction.

## OAuth 2.0 for user-based authentication