diff --git a/security/acme-client/pkg-descr b/security/acme-client/pkg-descr
index 4650976da..7bf1c46d5 100644
--- a/security/acme-client/pkg-descr
+++ b/security/acme-client/pkg-descr
@@ -12,6 +12,7 @@ Plugin Changelog
 
 Added:
 * new automation to reload www/caddy (#4692)
+* add support for Websupport.sk DNS API (#4540)
 
 Changed:
 * automatically resolve cron job mismatch (#4627)
diff --git a/security/acme-client/src/opnsense/mvc/app/controllers/OPNsense/AcmeClient/forms/dialogValidation.xml b/security/acme-client/src/opnsense/mvc/app/controllers/OPNsense/AcmeClient/forms/dialogValidation.xml
index b0f4e09a2..d71044036 100644
--- a/security/acme-client/src/opnsense/mvc/app/controllers/OPNsense/AcmeClient/forms/dialogValidation.xml
+++ b/security/acme-client/src/opnsense/mvc/app/controllers/OPNsense/AcmeClient/forms/dialogValidation.xml
@@ -1779,6 +1779,21 @@
         <label>ClientSecret</label>
         <type>password</type>
     </field>
+    <field>
+        <label>Websupport.sk</label>
+        <type>header</type>
+        <style>table_dns table_dns_websupport</style>
+    </field>
+    <field>
+        <id>validation.dns_websupport_api_key</id>
+        <label>Identifier</label>
+        <type>text</type>
+    </field>
+    <field>
+        <id>validation.dns_websupport_api_secret</id>
+        <label>Secret key</label>
+        <type>password</type>
+    </field>
     <field>
         <label>World4You</label>
         <type>header</type>
diff --git a/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeValidation/DnsWebsupport.php b/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeValidation/DnsWebsupport.php
new file mode 100644
index 000000000..83393e3eb
--- /dev/null
+++ b/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeValidation/DnsWebsupport.php
@@ -0,0 +1,44 @@
+<?php
+
+/*
+ * Copyright (C) 2025 Frank Wall
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+ * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+namespace OPNsense\AcmeClient\LeValidation;
+
+use OPNsense\AcmeClient\LeValidationInterface;
+use OPNsense\Core\Config;
+
+/**
+ * Websupport DNS API
+ * @package OPNsense\AcmeClient
+ */
+class DnsWebsupport extends Base implements LeValidationInterface
+{
+    public function prepare()
+    {
+        $this->acme_env['WS_ApiKey'] = (string)$this->config->dns_websupport_api_key;
+        $this->acme_env['WS_ApiSecret'] = (string)$this->config->dns_websupport_api_secret;
+    }
+}
diff --git a/security/acme-client/src/opnsense/mvc/app/models/OPNsense/AcmeClient/AcmeClient.xml b/security/acme-client/src/opnsense/mvc/app/models/OPNsense/AcmeClient/AcmeClient.xml
index b1efacf4a..4a3a31dcf 100644
--- a/security/acme-client/src/opnsense/mvc/app/models/OPNsense/AcmeClient/AcmeClient.xml
+++ b/security/acme-client/src/opnsense/mvc/app/models/OPNsense/AcmeClient/AcmeClient.xml
@@ -525,6 +525,7 @@
                         <dns_variomedia>Variomedia.de</dns_variomedia>
                         <dns_vscale>Vscale</dns_vscale>
                         <dns_vultr>Vultr</dns_vultr>
+                        <dns_websupport>Websupport.sk</dns_websupport>
                         <dns_world4you>World4You</dns_world4you>
                         <dns_yandex>Yandex PDD</dns_yandex>
                         <dns_zilore>Zilore</dns_zilore>
@@ -1247,6 +1248,12 @@
                 <dns_nic_secret type="TextField">
                     <Required>N</Required>
                 </dns_nic_secret>
+                <dns_websupport_api_key type="TextField">
+                    <Required>N</Required>
+                </dns_websupport_api_key>
+                <dns_websupport_api_secret type="TextField">
+                    <Required>N</Required>
+                </dns_websupport_api_secret>
                 <dns_world4you_username type="TextField">
                     <Required>N</Required>
                 </dns_world4you_username>