This version was discontinued, please upgrade to V2 https://wordpress.org/plugins/acf-to-rest-api/ Puts in answers all fields of ACF. Fork me on GitHub https://github.com/airesvsg/acf-to-wp-rest-api Get ACF data by ID /wp-json/acf/post/ID /wp-json/acf/page/ID /wp-json/acf/user/ID /wp-json/acf/term/ID/TAXONOMY /wp-json/acf/comment/ID /wp-json/acf/attachment/ID Get Options /wp-json/acf/options Get Option by Field Name /wp-json/acf/options/FIELD_NAME Sample Answer { "ID" : 1, "post_title" : "Post 1", "..." "acf" : { "field1" : "value 1", "field2" : "value 2" } } Filter Use the filter (acf_to_wp_rest_api_{type}_data) to customize the answer. The wildcard {type} can be: post, page, user, term, comment, attachment or options How to use add_filter( 'acf_to_wp_rest_api_post_data', function( $data, $object, $context ) { if ( isset( $data['type'] ) && 'my_post_type' == $data['type'] && isset( $data['acf'] ) ) { // do something } return $data; }, 10, 3 );