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

# Coinbase Business OAuth2 Authentication

The Coinbase Business API supports the [OAuth2 protocol](https://oauth.net/2/) so that developers can let Coinbase users grant a 3rd party application full or partial access to their account, without sharing the account's API key or login credentials.

It is a slightly more complex integration than the [API Key authentication method](/coinbase-app/authentication-authorization/api-key-authentication), but is more flexible. OAuth2 works well for web applications, as well as desktop and mobile apps.