Jerry Benton

TokenLink SSO Login for Zendesk allows WordPress site administrators to provide seamless, secure single sign-on (SSO) access to Zendesk using JWT (JSON Web Tokens) authentication.
This plugin uses the official Firebase PHP-JWT library (BSD 3-Clause licensed, included and updated for WordPress compliance).
Setup takes less than five minutes using standard WordPress shortcodes — no third-party dependencies, no tracking, no bloat.
Written by Jerry Benton, the creator of Mailborder and MailScanner v5.
<h3>From the WordPress Plugin Directory (Preferred)</h3>
<ol>
<li>In your WordPress admin dashboard, go to Plugins → Add New.</li>
<li>Search for TokenLink SSO Login for Zendesk.</li>
<li>Click Install Now, then Activate.</li>
</ol>
<h3>Upload via ZIP File</h3>
<ol>
<li>Download the plugin ZIP file from <a href="https://www.mailborder.com/zendesk-sso-plugin" rel="nofollow ugc">mailborder.com</a> or from WordPress.org.</li>
<li>In your WordPress admin dashboard, go to Plugins → Add New and click Upload Plugin at the top.</li>
<li>Select the ZIP file and click Install Now.</li>
<li>When installation completes, click Activate Plugin.</li>
</ol>
<h3>Manual Installation (FTP or File Manager)</h3>
<ol>
<li>Download the plugin ZIP file and extract it on your computer.</li>
<li>Upload the extracted folder to <code>/wp-content/plugins/</code> using FTP or your hosting file manager.</li>
<li>Activate it through the Plugins menu in WordPress.</li>
</ol>
<h3>Configuration</h3>
<ol>
<li>Navigate to Settings → TokenLink Zendesk SSO.</li>
<li>Enter your Zendesk Subdomain and Shared Secret.</li>
<li>Set a Login Redirect Page if you use a custom login URL.</li>
<li>Create a blank WordPress page and insert this shortcode: ** [tokenlink_zendesk_login] **</li>
<li>(Optional) Create a menu item that links to that page. (e.g. a Support link)</li>
<li>Use that page’s URL as your Remote Login URL in the zendesk.com SSO settings.</li>
</ol>
The plugin will automatically handle authentication to Zendesk and redirect users to Zendesk via secure JWT SSO.
<h3>License</h3>
This plugin is licensed under the GPLv3 or later. 
It includes the Firebase PHP-JWT library, which is licensed under the BSD 3-Clause license.

TokenLink SSO Login for Zendesk

Provides secure JWT-based single sign-on (SSO) between WordPress and Zendesk. No third-party plugins, no tracking, no bloat. Totally free.

vitalyu

You can create an Article in Zendesk and say WordPress to sync this article content from WordPress post/page. 
Each time you update this WordPress’s page/post it will automatically update the article in Zendesk.

WordPress Page to Zendesk Article

Wordpress Page/Post to Zendesk Article Synchronization Plugin

TokenLink SSO Login for Zendesk vs WordPress Page to Zendesk Article