diff --git a/src/main/java/io/cryostat/messaging/notifications/Notification.java b/src/main/java/io/cryostat/messaging/notifications/Notification.java
index 44a4f6ea5e..a1d8981c1f 100644
--- a/src/main/java/io/cryostat/messaging/notifications/Notification.java
+++ b/src/main/java/io/cryostat/messaging/notifications/Notification.java
@@ -15,6 +15,9 @@
  */
 package io.cryostat.messaging.notifications;
 
+import java.util.HashMap;
+import java.util.Map;
+
 import io.cryostat.net.web.http.HttpMimeType;
 
 public class Notification<T> {
@@ -82,6 +85,27 @@ public Notification<T> build() {
         }
     }
 
+    public static class OwnedResourceBuilder extends Builder<Map<String, Object>> {
+
+        private final Map<String, Object> map = new HashMap<>();
+
+        OwnedResourceBuilder(NotificationSource source, String category) {
+            super(source);
+            metaType(HttpMimeType.JSON);
+            metaCategory(category);
+            message(map);
+        }
+
+        public OwnedResourceBuilder messageEntry(String key, Object value) {
+            if (value == null) {
+                this.map.remove(key);
+            } else {
+                this.map.put(key, value);
+            }
+            return this;
+        }
+    }
+
     public static class Meta {
         private final String category;
         private final MetaType type;
diff --git a/src/main/java/io/cryostat/messaging/notifications/NotificationFactory.java b/src/main/java/io/cryostat/messaging/notifications/NotificationFactory.java
index 1167e17f8d..c929db2e56 100644
--- a/src/main/java/io/cryostat/messaging/notifications/NotificationFactory.java
+++ b/src/main/java/io/cryostat/messaging/notifications/NotificationFactory.java
@@ -15,23 +15,35 @@
  */
 package io.cryostat.messaging.notifications;
 
-import io.cryostat.net.web.http.HttpMimeType;
+import io.cryostat.recordings.JvmIdHelper;
+import io.cryostat.recordings.JvmIdHelper.JvmIdGetException;
 
 public class NotificationFactory {
 
     private final NotificationSource source;
+    private final JvmIdHelper jvmIdHelper;
 
-    NotificationFactory(NotificationSource source) {
+    NotificationFactory(NotificationSource source, JvmIdHelper jvmIdHelper) {
         this.source = source;
+        this.jvmIdHelper = jvmIdHelper;
     }
 
     public <T> Notification.Builder<T> createBuilder() {
         return new Notification.Builder<T>(source);
     }
 
-    public <T> Notification.Builder<T> createOwnedResourceBuilder(String notificationCategory) {
-        return new Notification.Builder<T>(source)
-                .metaType(HttpMimeType.JSON)
-                .metaCategory(notificationCategory);
+    public Notification.OwnedResourceBuilder createOwnedResourceBuilder(
+            String notificationCategory) {
+        return new Notification.OwnedResourceBuilder(source, notificationCategory);
+    }
+
+    public Notification.OwnedResourceBuilder createOwnedResourceBuilder(
+            String targetId, String notificationCategory) throws JvmIdGetException {
+        return new Notification.OwnedResourceBuilder(source, notificationCategory)
+                // FIXME the websocket notification system should only emit the targetId under one
+                // named key or the other, not both - are we already consistent with this?
+                .messageEntry("target", targetId)
+                .messageEntry("connectUrl", targetId)
+                .messageEntry("jvmId", jvmIdHelper.getJvmId(targetId));
     }
 }
diff --git a/src/main/java/io/cryostat/messaging/notifications/NotificationsModule.java b/src/main/java/io/cryostat/messaging/notifications/NotificationsModule.java
index 9777bfffd6..120f72c3e3 100644
--- a/src/main/java/io/cryostat/messaging/notifications/NotificationsModule.java
+++ b/src/main/java/io/cryostat/messaging/notifications/NotificationsModule.java
@@ -19,6 +19,8 @@
 
 import javax.inject.Singleton;
 
+import io.cryostat.recordings.JvmIdHelper;
+
 import dagger.Lazy;
 import dagger.Module;
 import dagger.Provides;
@@ -34,7 +36,8 @@ static NotificationSource provideNotificationSource(Lazy<Set<NotificationListene
 
     @Provides
     @Singleton
-    static NotificationFactory provideNotificationFactory(NotificationSource source) {
-        return new NotificationFactory(source);
+    static NotificationFactory provideNotificationFactory(
+            NotificationSource source, JvmIdHelper idHelper) {
+        return new NotificationFactory(source, idHelper);
     }
 }
diff --git a/src/main/java/io/cryostat/net/web/http/api/beta/RecordingsFromIdPostHandler.java b/src/main/java/io/cryostat/net/web/http/api/beta/RecordingsFromIdPostHandler.java
index 6bd995d30f..87dd745a31 100644
--- a/src/main/java/io/cryostat/net/web/http/api/beta/RecordingsFromIdPostHandler.java
+++ b/src/main/java/io/cryostat/net/web/http/api/beta/RecordingsFromIdPostHandler.java
@@ -47,6 +47,7 @@
 import io.cryostat.net.web.http.api.v2.ApiException;
 import io.cryostat.recordings.JvmIdHelper;
 import io.cryostat.recordings.JvmIdHelper.JvmIdDoesNotExistException;
+import io.cryostat.recordings.JvmIdHelper.JvmIdGetException;
 import io.cryostat.recordings.RecordingArchiveHelper;
 import io.cryostat.recordings.RecordingMetadataManager;
 import io.cryostat.recordings.RecordingMetadataManager.Metadata;
@@ -274,35 +275,30 @@ public void handleAuthenticated(RoutingContext ctx) throws Exception {
                                     try {
 
                                         notificationFactory
-                                                .createOwnedResourceBuilder(NOTIFICATION_CATEGORY)
-                                                .message(
-                                                        Map.of(
-                                                                "recording",
-                                                                new ArchivedRecordingInfo(
-                                                                        connectUrl,
-                                                                        fsName,
-                                                                        webServer
-                                                                                .get()
-                                                                                .getArchivedDownloadURL(
-                                                                                        connectUrl,
-                                                                                        fsName),
-                                                                        webServer
-                                                                                .get()
-                                                                                .getArchivedReportURL(
-                                                                                        connectUrl,
-                                                                                        fsName),
-                                                                        metadata,
-                                                                        size,
-                                                                        archivedTime),
-                                                                "target",
+                                                .createOwnedResourceBuilder(
+                                                        connectUrl, NOTIFICATION_CATEGORY)
+                                                .messageEntry(
+                                                        "recording",
+                                                        new ArchivedRecordingInfo(
                                                                 connectUrl,
-                                                                "jvmId",
-                                                                jvmId))
+                                                                fsName,
+                                                                webServer
+                                                                        .get()
+                                                                        .getArchivedDownloadURL(
+                                                                                connectUrl, fsName),
+                                                                webServer
+                                                                        .get()
+                                                                        .getArchivedReportURL(
+                                                                                connectUrl, fsName),
+                                                                metadata,
+                                                                size,
+                                                                archivedTime))
                                                 .build()
                                                 .send();
                                     } catch (URISyntaxException
                                             | UnknownHostException
-                                            | SocketException e) {
+                                            | SocketException
+                                            | JvmIdGetException e) {
                                         logger.error(e);
                                         throw new ApiException(500, e);
                                     }