diff --git a/changelog.html b/changelog.html
index aefb2217b..0fb620576 100644
--- a/changelog.html
+++ b/changelog.html
@@ -47,6 +47,7 @@ <h1>
 <p><b>1.12.1</b> (to be determined)</p>
 <ul>
     <li>Now requires Openfire 5.1.0 or later</li>
+    <li>[<a href="https://github.com/igniterealtime/openfire-restAPI-plugin/issues/266">#266</a>] - Documentation: replace list of (unmaintained) REST API clients with instructions to generate a client from the OpenAPI specification</li>
     <li>[<a href="https://github.com/igniterealtime/openfire-restAPI-plugin/issues/265">#265</a>] - Ensure cross-database compatibility for unread message count query</li>
     <li>[<a href="https://github.com/igniterealtime/openfire-restAPI-plugin/issues/261">#261</a>] - Remove the deprecated 'userservice' endpoint</li>
     <li>[<a href="https://github.com/igniterealtime/openfire-restAPI-plugin/issues/259">#259</a>] - Prevent system property requests from affecting properties other than the one requested</li>
diff --git a/readme.html b/readme.html
index 054238b27..e22d5ebcb 100644
--- a/readme.html
+++ b/readme.html
@@ -18,7 +18,7 @@
                     <li><a href="#ci-build-status">CI Build Status</a></li>
                     <li><a href="#reporting-issues">Reporting Issues</a></li>
                     <li><a href="#feature-list">Feature list</a></li>
-                    <li><a href="#available-rest-api-clients">Available REST API clients</a></li>
+                    <li><a href="#generating-a-rest-api-client">Generating a REST API client</a></li>
                     <li><a href="#installation">Installation</a></li>
                     <li><a href="#explanation-of-rest">Explanation of REST</a></li>
                     <li><a href="#authentication">Authentication</a></li>
@@ -154,19 +154,17 @@ <h2 id="feature-list">Feature list</h2>
             <li>Get clustering status of Openfire</li>
             <li>Get overview of ‘readiness’ and ‘liveness’ state of Openfire</li>
         </ul>
-        <h2 id="available-rest-api-clients">Available REST API clients</h2>
-        <p>REST API clients are implementations of the REST API in a specific programming language.</p>
-        <h3 id="official">Official</h3>
+        <h2 id="generating-a-rest-api-client">Generating a REST API client</h2>
+        <p>The plugin publishes an <a href="https://www.openapis.org/">OpenAPI</a> specification that describes all of its endpoints. Rather
+            than relying on a hand-written client library, use this specification to generate a client for your programming
+            language of choice, using tools like <a href="https://openapi-generator.tech/">OpenAPI Generator</a>.</p>
+        <p>When the plugin is installed, the specification is available at:</p>
         <ul>
-            <li>JAVA: <a href="https://github.com/igniterealtime/REST-API-Client">https://github.com/igniterealtime/REST-API-Client</a></li>
-        </ul>
-        <h3 id="third-party">Third party</h3>
-        <ul>
-            <li>PHP: <a href="https://github.com/gidkom/php-openfire-restapi">https://github.com/gidkom/php-openfire-restapi</a> (partly implemented)</li>
-            <li>PHP: <a href="https://github.com/gnello/php-openfire-restapi">https://github.com/gnello/php-openfire-restapi</a> (partly implemented)</li>
-            <li>GO Lang: <a href="https://github.com/Urethramancer/fireman">https://github.com/Urethramancer/fireman</a> (partly implemented)</li>
-            <li>Python: <a href="https://github.com/seamus-45/openfire-restapi">https://github.com/seamus-45/openfire-restapi</a> (partly implemented)</li>
+            <li><code>http://example.org:9090/plugins/restapi/v1/openapi.yaml</code> (YAML)</li>
+            <li><code>http://example.org:9090/plugins/restapi/v1/openapi.json</code> (JSON)</li>
         </ul>
+        <p>An interactive version of the documentation, based on this specification, is linked from the plugin's page in the
+            Openfire admin console.</p>
         <h2 id="installation">Installation</h2>
         <p>Copy restAPI.jar into the plugins directory of your Openfire server. The plugin will be automatically deployed. To upgrade to a newer version, overwrite the restAPI.jar file with the new one.</p>
         <p><em>Important Step:</em> To enable the plugin make sure to set the system property <code>adminConsole.access.allow-wildcards-in-excludes</code> to <code>true</code></p>
diff --git a/readme.md b/readme.md
index bacf218d7..9f4b97905 100644
--- a/readme.md
+++ b/readme.md
@@ -26,17 +26,17 @@ Issues may be reported to the [forums](https://discourse.igniterealtime.org) or
 * Get clustering status of Openfire
 * Get overview of 'readiness' and 'liveness' state of Openfire
 
-## Available REST API clients
-REST API clients are implementations of the REST API in a specific programming language.
+## Generating a REST API client
+The plugin publishes an [OpenAPI](https://www.openapis.org/) specification that describes all of its endpoints. Rather
+than relying on a hand-written client library, use this specification to generate a client for your programming
+language of choice, using tools like [OpenAPI Generator](https://openapi-generator.tech/).
 
-### Official
-* JAVA: https://github.com/igniterealtime/REST-API-Client
+When the plugin is installed, the specification is available at:
+* `http://example.org:9090/plugins/restapi/v1/openapi.yaml` (YAML)
+* `http://example.org:9090/plugins/restapi/v1/openapi.json` (JSON)
 
-### Third party
-* PHP: https://github.com/gidkom/php-openfire-restapi (partly implemented)
-* PHP: https://github.com/gnello/php-openfire-restapi (partly implemented)
-* GO Lang: https://github.com/Urethramancer/fireman (partly implemented)
-* Python: https://github.com/seamus-45/openfire-restapi (partly implemented)
+An interactive version of the documentation, based on this specification, is linked from the plugin's page in the
+Openfire admin console.
 
 ## Installation