The WordPress REST API lets external applications interact directly with a WordPress site's content and data — reading and writing posts, pages, users, and more — without going through the standard admin dashboard, using standard web requests and JSON-formatted data.
What the REST API Enables
- Building custom mobile apps that pull content directly from a WordPress backend
- Running WordPress "headless," with a completely custom-built frontend
- Connecting WordPress to entirely external systems and third-party services
- Building custom, dynamic features requiring direct interaction with WordPress data
How It Works, at a Basic Level
A request sent to an endpoint like `/wp-json/wp/v2/posts` returns a site's posts formatted as JSON — structured data that any other application can read and use, entirely independent of any specific WordPress theme.
Why This Was Such a Meaningful Development
Before the REST API's introduction, WordPress content was fundamentally tied to its own theme system. The REST API opened content up considerably, allowing it to genuinely power mobile apps, custom frontends, and outside integrations — extending WordPress's reach well beyond a traditional website alone.
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