Andr&eacute; Boekhorst

This plugin combines the two of the best WordPress plugins: <a href="https://wordpress.org/plugins/advanced-custom-fields/" title="Advanced Custom Fields" rel="ugc">Advanced Custom Fields</a> and <a href="https://wordpress.org/plugins/json-rest-api/" title="WP REST API" rel="ugc">WP REST API</a>.
This plugin is based on the work from<a href="https://github.com/PanManAms/WP-JSON-API-ACF" title="Panman on Github" rel="nofollow ugc">Panman on Github</a>. He was right when he said it would be better as plugin, but it would be even better if it would be available through the WordPress Plugin Repository.
An addition made to this plugin is that each ACF Field van be filtered throug the hook: JSON_META_ACFFIELDNAME (where ACFFIELDNAME depends on the fieldname you’ve added in the Advanced Custom Fields backend.)

WP REST API Custom Fields

The plugin is installed but nothing is in the output of API

JUst does not work

Shows Advanced Custom Field output to the WP REST API for posts, pages, taxonomies and users.

Pericor

Automatically stores the meta data from the <code>meta</code> field of a wordpress REST API posts (<a href="https://developer.wordpress.org/rest-api/reference/posts/#create-a-post" rel="nofollow ugc">/wp-json/wp/v2/posts</a>) or pages (<a href="https://developer.wordpress.org/rest-api/reference/pages/#create-a-page" rel="nofollow ugc">/wp-json/wp/v2/pages</a>) POST in the meta data associated with the created page or post using <a href="https://developer.wordpress.org/reference/functions/update_post_meta/" rel="nofollow ugc">update_post_meta</a>. The key / value information sent in the REST POST ‘meta’ object field is stored as both ‘key’ and ‘_key’ to support different plugin formats. 
For example, if trying to set the YOAST SEO Plugin values dynamically when creating a page from the REST API, you would simply add the fields to the meta field of the REST POST data when you POST the endpoint, and the plugin values will be added to the page:
<pre><code>{
...
 'meta': {
 'yoast_wpseo_title': "Title set from REST call"
 'yoast_wpseo_metadesc': "Meta description set from REST call"
 }
...
}
</code></pre>
Use this plugin when dynamically creating pages with the WordPress REST API to support modifying plugin settings for pages/posts created using the REST API!
A guide on how to use this plugin to generate a page/post with plugins configured from the REST API is <a href="https://www.pericror.com/software/generating-pages-posts-plugins-using-wordpress-rest-api/" rel="nofollow ugc">available at Pericror.</a>
Inspired as a broader alternative to <a href="https://github.com/ChazUK/wp-api-yoast-meta" rel="nofollow ugc">wp-api-yoast-meta.</a>
Compatible with the <a href="http://v2.wp-api.org/" rel="nofollow ugc">wordpress rest api version 2.</a>

REST API Meta Support

This plugin was developed and used to generate pages with a review plugin configured programatically using the rest API per page and works as described.

Works as Described

Stores meta data (i.e plugin settings) from the meta field of a WP REST API posts or pages POST creation call in the created page or post meta data.

WP REST API Custom Fields vs REST API Meta Support