OAuth

OAuth.com is an educational resource focused on OAuth 2.0, the widely used standard for securing access to APIs. Its central offering, OAuth 2.0 Simplified, is a practical guide written by Aaron Parecki for developers building OAuth 2.0 servers and secure API integrations. The material combines high-level explanations, step-by-step instructions, and real-world examples to help readers understand authorization flows and apply them in different environments.

The guide covers server-side applications, single-page apps, mobile and native apps, browserless devices, client registration, scopes, redirect URLs, access and refresh tokens, and protecting applications with PKCE. It also introduces related topics such as OpenID Connect, IndieAuth, token introspection, security considerations, and OAuth tools and libraries. Readers can explore an OAuth 2.0 Playground and find the book in print or Kindle formats through the site.

OAuth.com is presented as a resource from the Okta team. For organizations seeking implementation support, it also promotes API access management as a service to help teams secure APIs and deliver products more quickly.