edckwt

This plugin enables you to fetch the contents of your site in JSON format by REST API 
Such as sections, articles and search results 
and return it as json 
To be able to use it in your applications or other sites
Endpoints
<ol>
<li>recent posts</li>
<li>posts</li>
<li>search</li>
<li>categories</li>
<li>category</li>
</ol>
For develpoers
<ul>
<li>/api/get_category_posts?type={string}&slug={string}&id={int}&count={int}&page={int}</li>
<li>/api/get_category_index</li>
<li>/api/get_search_results?type={string}&count={int}&page={int}</li>
<li>/api/get_recent_posts?type={string}</li>
<li>/api/get_posts?type={string}&cat={int}&count={int}&page={int}</li>
</ul>
Parameters
<ol>
<li>slug : {string} default: empty post slug</li>
<li>id : {int} default: empty post id</li>
<li>count: {int} default: 5 data display limit</li>
<li>page : {int} default: 1 data display offset</li>
<li>type : {string} default: post post_type</li>
</ol>

EDC REST API

Fetch the content of the sections and articles and search them through the API

scottfoster

This plugin adds a key within the <a href="https://developer.wordpress.org/rest-api/" rel="nofollow ugc">WordPress REST API</a> to add valid Gutenberg JSON schema.

REST Gutenberg

Adds a key and gutenberg block schema within the WordPress REST API

EDC REST API vs REST Gutenberg