diff --git a/modules/hcc-bootstrap/src/main/java/net/sf/dz3r/runtime/config/ConfigurationParser.java b/modules/hcc-bootstrap/src/main/java/net/sf/dz3r/runtime/config/ConfigurationParser.java
index f0c41a7f2..05a04d308 100644
--- a/modules/hcc-bootstrap/src/main/java/net/sf/dz3r/runtime/config/ConfigurationParser.java
+++ b/modules/hcc-bootstrap/src/main/java/net/sf/dz3r/runtime/config/ConfigurationParser.java
@@ -29,6 +29,7 @@
 import net.sf.dz3r.runtime.config.mqtt.MqttConfigurationParser;
 import net.sf.dz3r.runtime.config.onewire.OnewireConfigurationParser;
 import net.sf.dz3r.runtime.config.schedule.ScheduleConfigurationParser;
+import net.sf.dz3r.view.webui.v2.WebUI;
 import org.apache.logging.log4j.Level;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
@@ -199,6 +200,7 @@ private EndpointMeta renderMeta(HccRawConfig source, String digest) throws IOExc
                         source.instance(),
                         InstanceIdProvider.getId(),
                         digest,
+                        Optional.ofNullable(source.webUi().duplexPort()).orElse(WebUI.DEFAULT_PORT_DUPLEX),
                         new SimpleClientMeta(
                                 zones,
                                 devices
diff --git a/modules/hcc-data-source-api/src/main/java/com/homeclimatecontrol/hcc/meta/EndpointMeta.java b/modules/hcc-data-source-api/src/main/java/com/homeclimatecontrol/hcc/meta/EndpointMeta.java
index 6618063d2..87200fa7f 100644
--- a/modules/hcc-data-source-api/src/main/java/com/homeclimatecontrol/hcc/meta/EndpointMeta.java
+++ b/modules/hcc-data-source-api/src/main/java/com/homeclimatecontrol/hcc/meta/EndpointMeta.java
@@ -1,16 +1,20 @@
 package com.homeclimatecontrol.hcc.meta;
 
+import com.fasterxml.jackson.databind.PropertyNamingStrategies;
+import com.fasterxml.jackson.databind.annotation.JsonNaming;
+
 /**
  * The top level metadata the client will see.
  *
- * @param version Version for the clients to determine compatibility.
+ * @param protocolVersion Version for the clients to determine compatibility.
  * @param type Endpoint type. Always {@link Type#DIRECT} for the actual HCC instance.
  * @param instance Instance metadata.
  *
  * @author Copyright &copy; <a href="mailto:vt@homeclimatecontrol.com">Vadim Tkachenko</a> 2001-2023
  */
+@JsonNaming(PropertyNamingStrategies.KebabCaseStrategy.class)
 public record EndpointMeta(
-        String version,
+        String protocolVersion,
         Type type,
         InstanceMeta instance
 ) {
diff --git a/modules/hcc-data-source-api/src/main/java/com/homeclimatecontrol/hcc/meta/InstanceMeta.java b/modules/hcc-data-source-api/src/main/java/com/homeclimatecontrol/hcc/meta/InstanceMeta.java
index c8fb8c4d7..e5fd68a2b 100644
--- a/modules/hcc-data-source-api/src/main/java/com/homeclimatecontrol/hcc/meta/InstanceMeta.java
+++ b/modules/hcc-data-source-api/src/main/java/com/homeclimatecontrol/hcc/meta/InstanceMeta.java
@@ -14,6 +14,7 @@
  * @param name Instance name, taken from {@code HccRawConfig#instance}.
  * @param id Persistent unique system ID.
  * @param configDigest Current parsed (not source) configuration message digest.
+ * @param duplexPort Port to conduct RSocket communications on.
  * @param simple Simple UI metadata.
  * @param full Full control metadata.
  *
@@ -24,6 +25,7 @@ public record InstanceMeta(
         String name,
         UUID id,
         String configDigest,
+        int duplexPort,
         SimpleClientMeta simple,
         InstrumentClusterMeta full
 ) {
diff --git a/modules/hcc-webui/src/main/java/net/sf/dz3r/view/webui/v2/WebUI.java b/modules/hcc-webui/src/main/java/net/sf/dz3r/view/webui/v2/WebUI.java
index d0fbab3c1..70c597a68 100644
--- a/modules/hcc-webui/src/main/java/net/sf/dz3r/view/webui/v2/WebUI.java
+++ b/modules/hcc-webui/src/main/java/net/sf/dz3r/view/webui/v2/WebUI.java
@@ -165,7 +165,7 @@ private void advertise() {
                     "path", META_PATH, // http://www.dns-sd.org/txtrecords.html#http
                     "protocol-version", Version.PROTOCOL_VERSION,
 
-                    "duplex", Integer.toString(config.duplexPort),
+                    "duplex-port", Integer.toString(config.duplexPort),
                     "type",DIRECT.toString().toLowerCase(),
 
                     "name", config.instance,