Jeremy Pry

Allow Links from the Link Manager to be manipulated and retrieved using the REST API.
This plugin makes the following endpoints available:
<ul>
<li><code>/wp-json/wp/v2/links</code> – List details for all links, or create a new link.</li>
<li><code>/wp-json/wp/v2/links/<id></code> – List details for a particular link ID, update a link, or delete a link.</li>
</ul>
For more information about the REST API as a whole, refer to the <a href="https://wordpress.org/plugins/rest-api/" rel="ugc">REST API plugin</a>.
Note: This plugin requires the <a href="https://wordpress.org/plugins/rest-api/" rel="ugc">REST API plugin</a>.

REST API Link Manager

Enable REST API endpoints for Links in the Link Manager.

ravimareedu

With this plugin you can efficiently create your website/blog inner links/content links. A specific words can be linked to any specific link through out the site/blog. The beautiful part is, you can restrict the internal linking within a taxonomy/category, So that it will avoid linking unrelevant worrds. 
<a href="http://xmlswf.com" rel="nofollow ugc">Power Links</a> allows you to manage site internal links for blogs. 
Let me provide you an example. 
If you want to link to “orange” in the category of “Fruits” it will not link to the “orange” in the category of “Colors”. I hope this is what I did not found on many inter linking plugins and we built one with covering these problems. 
See it in actoin at : https://beautyhealthtips.in

Power Links – Internal Link Manager

Power Links plugin Manages your WordPress blog internal content links effectively and improves your SEO performance with proper link juice.

REST API Link Manager vs Power Links – Internal Link Manager