Since version 5.11, ACF has included support for viewing and managing custom fields via the WordPress REST API. This allows developers to access and edit their custom field data using default WP REST API endpoints, or build custom themes using React, Vue, or any other JavaScript library.

Any custom field groups added to WordPress data like posts (including custom post types), users, and categories (including custom taxonomies) will be available in their respective WP REST API endpoints, namely:

• /{post-type}
  • posts, pages, custom-post-types, etc.
• /{post-type}/{post_id}
• /{post-type}/{post_id}/revisions
• /{post-type}/{post_id}/revisions/{revision_id}
• /{post-type}/{post_id}/autosaves
• /{post-type}/{post_id}/autosaves/{autosave_id}