Joaquim Domingos António

If you wish to ‘Create comments’ using REST API, without exposing Administrator credentials to the Front-End application, you are at the right place. Since WordPress 4.7, REST API was natively included in WordPress.
In order to ‘Create a comment’ , the authentication for a user with ‘Administrator’ role is required. While this is a deliberately done for security reasons, such implementation makes it very hard for Front-End applications to implement a simple ‘Post Comment’ or ‘Reply Comment’ function.
This plugin fulfils such requirement by extending the existing WordPress REST API endpoints.
Requirements:
Minimum PHP version: 7.0 
Minimum WordPress version: 5.5
Installation:
Download the plugin form wordpress marketplace install it like any other WordPress plugin. 
After the installation activate the plugin through the ‘Plugins’ menu in WordPress
Endpoint:
When this plugin is installed one new endpoint is added to the wp/v2 namespace.
 Endpoint 
 HTTP Verb 
 Permalinks
 */wp-json/wp/v2/comments/create 
 POST 
 enabled
 */?rest_route=/wp/v2/comments/create 
 POST 
 disabled
Usage:
<ol>
<li>Create a Comment</li>
</ol>
To create a comment using REST API, send a <code>POST</code> request to:
<blockquote>
<code>/wp-json/wp/v2/comments/create</code> – if permalinks is enabled on your wordpress website.
</blockquote>
Or
<blockquote>
<code>/?rest_route=/wp/v2/comments/create</code> if permalinks is not enabled on your wordpress website.
</blockquote>
With a JSON body, as shown bellow:
<pre><code>`Json
</code></pre>
{ 
 “post”: “Post ID”, 
 “author_name”: “Comment Author’s name”, 
 “author_email”: “Comment Author’s email”, 
 “content”: “Comment content” 
} 
 `
The content may also be send as an object:
<pre><code>`Json
</code></pre>
{ 
 “post”: “Post ID”, 
 “author_name”: “Comment Author’s name”, 
 “author_email”: “Comment Author’s email”, 
 “content”: { 
 “raw”:”Comment content” 
 } 
} 
 `
Set header to:
<pre><code>`
</code></pre>
content-type: application/json 
 ` 
If successful, you should receive a response with the data of the created comment:
<pre><code>`Json
</code></pre>
{ 
 “id”: “[comment id]”, 
 “status”: “[comment status]”, 
 “message”:”[server response message]” 
} 
 `
In response header the status code should be:
<pre><code>`Http
</code></pre>
HTTP 201 Created 
 `
<ol>
<li>Reply a comment</li>
</ol>
To reply a comment you just need to add the field parent for the parent comment to the JSON body
<pre><code>`Json
</code></pre>
{ 
 “post”: “Post ID”, 
 “author_name”: “Comment Author’s name”, 
 “author_email”: “Comment Author’s email”, 
 “content”: “Comment content”, 
 “parent”:”Comment parent ID” 
} 
 `
<blockquote>
Note: Ensure the parent is a comment id that belongs to the post informed in the field post. The comment parent post id must match the post id otherwise the following error will be shown:
</blockquote>
<pre><code>`Json
</code></pre>
{ 
 “code”: “rest_post_mismatch_parent_post_id”, 
 “message”: “Post ID and Parent post ID does not match”, 
 “data”: { 
 “status”: 400 
 } 
} 
 `
<h3>Contact</h3>
If there is any thing to say about the plugin fill free to <a href="mailto:sopport@appsdabanda.com" rel="nofollow ugc">contact us</a>.

REST API Comment

REST API Comment adds in the 'Comment creation' function to the Wordpress REST API.

Make

<a href="https://www.make.com/en?utm_source=wordpress&utm_medium=partner&utm_campaign=wordpress-partner-make" rel="nofollow ugc">Make</a> is a visual platform that lets you design, build, and automate anything – from simple tasks to complex workflows – in minutes. With Make, you can send information between WordPress and thousands of apps to drive traffic and improve sales potential. It’s fast and easy to use, visually intuitive and requires zero coding expertise.
Here are some of the ways to use WordPress with Make:
<ul>
<li>Add new WordPress users to your CMR and marketing tools, like Salesforce, ActiveCampaign, or Mailchimp</li>
<li>Create new WordPress posts from incoming webhook data, Google Forms responses, or FreeScout conversations</li>
<li>Share your WordPress posts on Facebook, Pinterest, or other social media platforms</li>
<li>Send a message about new WordPress posts to messaging apps, like Slack, Telegram, or Microsoft Teams</li>
<li>Create database items from your WordPress posts in Notion, MySQL, or any other database app</li>
<li>Or choose a <a href="https://www.make.com/en/templates?utm_source=wordpress&utm_medium=partner&utm_campaign=wordpress-partner-program" rel="nofollow ugc">template</a> to help you get started. </li>
</ul>
How to get started:
<ul>
<li><a href="https://www.make.com/en/register?utm_source=wordpress&utm_medium=partner&utm_campaign=wordpress-partner-program" rel="nofollow ugc">Sign up for Make</a>, and enjoy a free account forever. Or, choose a monthly or yearly plan with advanced features.</li>
<li>Check <a href="https://www.make.com/en/help/apps/website-building/wordpress#connecting-wordpress-to-make-968742?utm_source=wordpress&utm_medium=partner&utm_campaign=wordpress-partner-program" rel="nofollow ugc">Make’s documentation on how to connect WordPress</a>. </li>
<li>Install the plugin, and <a href="https://www.make.com/en/integrations/wordpress?utm_source=wordpress&utm_medium=partner&utm_campaign=wordpress-partner-program" rel="nofollow ugc">start building WordPress integrations on Make</a>.</li>
</ul>
Get help from <a href="https://www.make.com/en/ticket?utm_source=wordpress&utm_medium=partner&utm_campaign=wordpress-partner-program" rel="nofollow ugc">Make’s Support</a> team. 
Make’s <a href="https://www.make.com/en/terms-and-conditions?utm_source=wordpress&utm_medium=partner&utm_campaign=wordpress-partner-make" rel="nofollow ugc">Terms of use</a> and <a href="https://www.make.com/en/privacy-notice?utm_source=wordpress&utm_medium=partner&utm_campaign=wordpress-partner-make" rel="nofollow ugc">Privacy policy</a>.

Make Connector

Make Connector. Make lets you design, build, and automate by connecting with WordPress in just a few clicks.

REST API Comment vs Make Connector