diff --git a/qtribu/gui/dlg_settings.py b/qtribu/gui/dlg_settings.py
index 3023c141..e4051720 100644
--- a/qtribu/gui/dlg_settings.py
+++ b/qtribu/gui/dlg_settings.py
@@ -65,6 +65,8 @@ def __init__(self, parent=None):
         # self.lne_qchat_instance_uri.setValidator(QVAL_URL)
         self.btn_rules.pressed.connect(self.show_instance_rules)
         self.btn_rules.setIcon(QIcon(QgsApplication.iconPath("processingResult.svg")))
+        self.btn_discover.pressed.connect(self.discover_instances)
+        self.btn_discover.setIcon(QIcon(QgsApplication.iconPath("mIconListView.svg")))
 
         # customization
         self.btn_help.setIcon(QIcon(QgsApplication.iconPath("mActionHelpContents.svg")))
@@ -178,6 +180,9 @@ def load_settings(self) -> None:
         self.lbl_version_saved_value.setText(settings.version)
 
     def show_instance_rules(self) -> None:
+        """
+        Action called when clicking on the "Instance rules" button
+        """
         instance_url = self.cbb_qchat_instance_uri.currentText()
         try:
             client = QChatApiClient(instance_url)
@@ -206,6 +211,27 @@ def show_instance_rules(self) -> None:
         except Exception as e:
             self.log(message=str(e), log_level=Qgis.Critical)
 
+    def discover_instances(self) -> None:
+        """
+        Action called when clicking on the "Discover instances" button
+        """
+        try:
+            client = QChatApiClient(self.cbb_qchat_instance_uri.currentText())
+            instances = client.get_registered_instances()
+            msg = ""
+            for lang, lang_instances in instances.items():
+                msg += f"[{lang}]:\n"
+                for li in lang_instances:
+                    msg += f"- {li}\n"
+                msg += "\n"
+            QMessageBox.information(
+                self,
+                self.tr("Registered instances"),
+                msg,
+            )
+        except Exception as e:
+            self.log(message=str(e), log_level=Qgis.Critical)
+
     def on_ring_tone_changed(self) -> None:
         """
         Action called when ringtone value is changed
diff --git a/qtribu/gui/dlg_settings.ui b/qtribu/gui/dlg_settings.ui
index f9312144..2ec01b6d 100644
--- a/qtribu/gui/dlg_settings.ui
+++ b/qtribu/gui/dlg_settings.ui
@@ -315,9 +315,6 @@
           </property>
          </widget>
         </item>
-        <item>
-         <widget class="QgsSymbolButton" name="mSymbolButton"/>
-        </item>
         <item>
          <widget class="QComboBox" name="cbb_qchat_instance_uri">
           <property name="sizePolicy">
@@ -348,6 +345,13 @@
           </property>
          </widget>
         </item>
+        <item>
+         <widget class="QPushButton" name="btn_discover">
+          <property name="text">
+           <string>Discover instances</string>
+          </property>
+         </widget>
+        </item>
        </layout>
       </item>
       <item>
@@ -754,11 +758,6 @@
    <extends>QToolButton</extends>
    <header>qgscolorbutton.h</header>
   </customwidget>
-  <customwidget>
-   <class>QgsSymbolButton</class>
-   <extends>QToolButton</extends>
-   <header>qgssymbolbutton.h</header>
-  </customwidget>
   <customwidget>
    <class>AuthoringWidget</class>
    <extends>QWidget</extends>
@@ -774,7 +773,6 @@
   <tabstop>btn_reset_read_history</tabstop>
   <tabstop>chb_integration_news_feed</tabstop>
   <tabstop>chb_license_global_accept</tabstop>
-  <tabstop>mSymbolButton</tabstop>
   <tabstop>cbb_qchat_instance_uri</tabstop>
   <tabstop>btn_rules</tabstop>
   <tabstop>ckb_show_avatars</tabstop>
diff --git a/qtribu/logic/qchat_client.py b/qtribu/logic/qchat_client.py
index 0eab8dc0..d73b14a9 100644
--- a/qtribu/logic/qchat_client.py
+++ b/qtribu/logic/qchat_client.py
@@ -16,6 +16,8 @@
 
 CONTENT_TYPE_JSON = "application/json"
 
+INSTANCES_JSON_URL = "https://github.com/geotribu/gischat/raw/main/instances.json"
+
 
 class QChatApiClient:
     """
@@ -29,6 +31,16 @@ def __init__(
         self.instance_uri = instance_uri
         self.qntwk = NetworkRequestsManager()
 
+    def get_registered_instances(self) -> dict[str, list[str]]:
+        response: QByteArray = self.qntwk.get_from_source(
+            headers=HEADERS,
+            url=INSTANCES_JSON_URL,
+            response_expected_content_type="text/plain; charset=utf-8",
+            use_cache=False,
+        )
+        data = json.loads(str(response, "UTF8"))
+        return data
+
     def get_status(self) -> dict[str, Any]:
         """
         Get instance status with an API call