This plugin extends the REST API for sites using custom fields, making that data available for external applications, headless front-ends, and mobile apps. It is designed for developers who need to programmatically interact with custom site data beyond standard post content.

Automatic Integration: Once installed, the plugin automatically includes all custom field values from posts, pages, and custom post types in API responses under a dedicated key, with no manual setup required.

Broad Data Support: It works with custom fields attached to various content types, including terms (categories, tags) and user profiles, provided the necessary core field management plugins are active.

Simplified Development: By exposing custom data through the standard API, it eliminates the need to write custom endpoints, speeding up the process of connecting external apps to your site's database.

Free and Open Source: The extension is available at no cost under the GPL license, allowing for use on an unlimited number of sites, both personal and commercial.