diff --git a/BUILD b/BUILD
index 7370013..2c38d9e 100644
--- a/BUILD
+++ b/BUILD
@@ -15,6 +15,7 @@
     manifest_entries = [
         "Gerrit-PluginName: git-repo-metrics",
         "Gerrit-Module: com.googlesource.gerrit.plugins.gitrepometrics.Module",
+        "Gerrit-ReloadMode: restart",
         "Implementation-Title: git-repo-metrics plugin",
         "Implementation-URL: https://review.gerrithub.io/admin/repos/GerritForge/git-repo-metrics",
         "Implementation-Vendor: GerritForge",
diff --git a/src/main/java/com/googlesource/gerrit/plugins/gitrepometrics/Module.java b/src/main/java/com/googlesource/gerrit/plugins/gitrepometrics/Module.java
index 6bbf8f7..014a4d8 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/gitrepometrics/Module.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/gitrepometrics/Module.java
@@ -40,5 +40,6 @@
     DynamicSet.bind(binder(), MetricsCollector.class).to(FSMetricsCollector.class);
     DynamicSet.bind(binder(), MetricsCollector.class).to(GitRefsMetricsCollector.class);
     install(new UpdateGitMetricsTaskModule());
+    listener().to(RepoCountMetricRegister.class);
   }
 }
diff --git a/src/main/java/com/googlesource/gerrit/plugins/gitrepometrics/RepoCountMetricRegister.java b/src/main/java/com/googlesource/gerrit/plugins/gitrepometrics/RepoCountMetricRegister.java
new file mode 100644
index 0000000..221dda7
--- /dev/null
+++ b/src/main/java/com/googlesource/gerrit/plugins/gitrepometrics/RepoCountMetricRegister.java
@@ -0,0 +1,60 @@
+// Copyright (C) 2024 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.googlesource.gerrit.plugins.gitrepometrics;
+
+import javax.inject.Inject;
+
+import com.google.common.annotations.VisibleForTesting;
+import com.google.common.base.Supplier;
+import com.google.common.flogger.FluentLogger;
+import com.google.gerrit.extensions.events.LifecycleListener;
+import com.google.gerrit.metrics.Description;
+import com.google.gerrit.metrics.MetricMaker;
+import com.google.gerrit.server.project.ProjectCache;
+import com.google.inject.Singleton;
+
+@Singleton
+public class RepoCountMetricRegister implements LifecycleListener {
+  private static final FluentLogger logger = FluentLogger.forEnclosingClass();
+  protected static final String REPO_COUNT_METRIC_NAME = "numberofprojects";
+  private final MetricMaker metricMaker;
+  private final ProjectCache projectCache;
+
+  @VisibleForTesting
+  @Inject
+  RepoCountMetricRegister(ProjectCache projectCache, MetricMaker metricMaker) {
+    this.metricMaker = metricMaker;
+    this.projectCache = projectCache;
+  }
+
+  @Override
+  public void start() {
+    logger.atInfo().log("Registering metric " + REPO_COUNT_METRIC_NAME);
+
+    metricMaker.newCallbackMetric(
+        REPO_COUNT_METRIC_NAME,
+        Long.class,
+        new Description("Number of existing projects.").setGauge().setUnit("Count"),
+        new Supplier<Long>() {
+          @Override
+          public Long get() {
+            return (long) projectCache.all().size();
+          }
+        });
+  }
+
+  @Override
+  public void stop() {}
+}
diff --git a/src/resources/Documentation/config.md b/src/resources/Documentation/config.md
index 803839a..8f8b6cd 100644
--- a/src/resources/Documentation/config.md
+++ b/src/resources/Documentation/config.md
@@ -2,9 +2,14 @@
 ======================
 
 The @PLUGIN@ allows a systematic collection of repository metrics.
-Metrics are updated upon a `ref-update` receive.
 
-Currently, the metrics exposed are the following:
+The following exposed metric is available on request with the current status:
+
+```bash
+plugins_git_repo_metrics_numberOfProjects
+```
+
+The following exposed metrics are updated upon a `ref-update` receive:
 
 ```bash
 plugins_git_repo_metrics_numberofbitmaps_<repo_name>
diff --git a/src/test/java/com/googlesource/gerrit/plugins/gitrepometrics/FakeMetricMaker.java b/src/test/java/com/googlesource/gerrit/plugins/gitrepometrics/FakeMetricMaker.java
index 6faaf99..0eb1778 100644
--- a/src/test/java/com/googlesource/gerrit/plugins/gitrepometrics/FakeMetricMaker.java
+++ b/src/test/java/com/googlesource/gerrit/plugins/gitrepometrics/FakeMetricMaker.java
@@ -14,8 +14,13 @@
 
 package com.googlesource.gerrit.plugins.gitrepometrics;
 
+import java.util.HashMap;
+import java.util.Optional;
+
 import com.codahale.metrics.Meter;
 import com.codahale.metrics.MetricRegistry;
+import com.google.common.base.Supplier;
+import com.google.gerrit.extensions.registration.RegistrationHandle;
 import com.google.gerrit.metrics.CallbackMetric0;
 import com.google.gerrit.metrics.Description;
 import com.google.gerrit.metrics.DisabledMetricMaker;
@@ -23,16 +28,19 @@
 class FakeMetricMaker extends DisabledMetricMaker {
   Integer callsCounter;
   private MetricRegistry metricRegistry;
+  HashMap<String, Supplier<?>> actionMap;
 
+  @SuppressWarnings({"rawtypes", "unchecked"})
   FakeMetricMaker(MetricRegistry metricRegistry) {
-    callsCounter = 0;
+    this.callsCounter = 0;
     this.metricRegistry = metricRegistry;
+    this.actionMap = new HashMap();
   }
 
+  @SuppressWarnings("unused")
   @Override
   public <V> CallbackMetric0<V> newCallbackMetric(
       String name, Class<V> valueClass, Description desc) {
-
     callsCounter += 1;
     metricRegistry.register(
         String.format("%s/%s/%s", "plugins", "git-repo-metrics", name), new Meter());
@@ -45,4 +53,25 @@
       public void remove() {}
     };
   }
+
+  @Override
+  public <V> RegistrationHandle newCallbackMetric(
+      String name, Class<V> valueClass, Description desc, Supplier<V> trigger) {
+    callsCounter += 1;
+
+    String metricName = String.format("%s/%s/%s", "plugins", "git-repo-metrics", name);
+
+    metricRegistry.register(metricName, new Meter());
+
+    actionMap.put(metricName, trigger);
+
+    return null;
+  }
+
+  @SuppressWarnings("rawtypes")
+  public Optional<Supplier> getValueForMetric(String metric) {
+    if (actionMap.containsKey(metric)) return Optional.of(actionMap.get(metric));
+
+    return Optional.empty();
+  }
 }
diff --git a/src/test/java/com/googlesource/gerrit/plugins/gitrepometrics/FakeProjectCache.java b/src/test/java/com/googlesource/gerrit/plugins/gitrepometrics/FakeProjectCache.java
new file mode 100644
index 0000000..96d8db9
--- /dev/null
+++ b/src/test/java/com/googlesource/gerrit/plugins/gitrepometrics/FakeProjectCache.java
@@ -0,0 +1,44 @@
+// Copyright (C) 2024 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.googlesource.gerrit.plugins.gitrepometrics;
+
+import java.util.Set;
+import java.util.stream.Collectors;
+import java.util.stream.IntStream;
+
+import com.google.common.collect.ImmutableSortedSet;
+import com.google.gerrit.entities.Project;
+import com.google.gerrit.entities.Project.NameKey;
+import com.google.gerrit.server.project.NullProjectCache;
+
+public class FakeProjectCache extends NullProjectCache {
+  private Set<Project.NameKey> projects;
+
+  @Override
+  public ImmutableSortedSet<NameKey> all() {
+    return ImmutableSortedSet.copyOf(projects);
+  }
+
+  public void setProjectCount(int projectCount) {
+    projects =
+        IntStream.range(0, projectCount)
+            .mapToObj(i -> NameKey.parse(String.valueOf(i)))
+            .collect(Collectors.toSet());
+  }
+
+  public FakeProjectCache(int count) {
+    setProjectCount(count);
+  }
+}
diff --git a/src/test/java/com/googlesource/gerrit/plugins/gitrepometrics/GitRepoMetricsCacheIT.java b/src/test/java/com/googlesource/gerrit/plugins/gitrepometrics/GitRepoMetricsCacheIT.java
index 4eee736..b72fb9c 100644
--- a/src/test/java/com/googlesource/gerrit/plugins/gitrepometrics/GitRepoMetricsCacheIT.java
+++ b/src/test/java/com/googlesource/gerrit/plugins/gitrepometrics/GitRepoMetricsCacheIT.java
@@ -37,7 +37,7 @@
     sysModule = "com.googlesource.gerrit.plugins.gitrepometrics.Module")
 public class GitRepoMetricsCacheIT extends LightweightPluginDaemonTest {
 
-  private final int MAX_WAIT_TIME_FOR_METRICS_SECS = 5;
+  private final int MAX_WAIT_TIME_FOR_METRICS_SECS = 10;
 
   @Inject MetricRegistry metricRegistry;
   private FSMetricsCollector fsMetricsCollector;
@@ -77,8 +77,10 @@
             + gitRefsMetricsCollector.availableMetrics().size();
 
     try {
+      // One additional is added for the numberofprojects metric
       WaitUtil.waitUntil(
-          () -> getPluginMetricsCount() == (long) availableProjects.size() * expectedMetricsCount,
+          () ->
+              getPluginMetricsCount() == (long) (availableProjects.size() * expectedMetricsCount) + 1,
           Duration.ofSeconds(MAX_WAIT_TIME_FOR_METRICS_SECS));
     } catch (InterruptedException e) {
       fail(
diff --git a/src/test/java/com/googlesource/gerrit/plugins/gitrepometrics/RepoCountMetricTest.java b/src/test/java/com/googlesource/gerrit/plugins/gitrepometrics/RepoCountMetricTest.java
new file mode 100644
index 0000000..bd84544
--- /dev/null
+++ b/src/test/java/com/googlesource/gerrit/plugins/gitrepometrics/RepoCountMetricTest.java
@@ -0,0 +1,76 @@
+// Copyright (C) 2024 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+package com.googlesource.gerrit.plugins.gitrepometrics;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import java.util.Optional;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import com.codahale.metrics.MetricRegistry;
+
+import com.google.common.base.Supplier;
+
+public class RepoCountMetricTest {
+  private FakeMetricMaker fakeMetricMaker;
+  private MetricRegistry metricRegistry;
+  private FakeProjectCache fakeProjectCache;
+  private String repoCountMetricName;
+
+  @Before
+  public void setup() {
+    metricRegistry = new MetricRegistry();
+    fakeMetricMaker = new FakeMetricMaker(metricRegistry);
+    fakeProjectCache = new FakeProjectCache(0);
+    repoCountMetricName =
+        String.format(
+            "%s/%s/%s",
+            "plugins", "git-repo-metrics", RepoCountMetricRegister.REPO_COUNT_METRIC_NAME);
+  }
+
+  @Test
+  public void metricIsCorrectlyRegistered() {
+    RepoCountMetricRegister repoCountMetricRegister =
+        new RepoCountMetricRegister(fakeProjectCache, fakeMetricMaker);
+
+    repoCountMetricRegister.start();
+
+    assertTrue(metricRegistry.getMetrics().containsKey(repoCountMetricName));
+
+    metricRegistry.remove(repoCountMetricName);
+  }
+
+  @Test
+  public void metricIsUpdated() {
+    RepoCountMetricRegister repoCountMetricRegister =
+        new RepoCountMetricRegister(fakeProjectCache, fakeMetricMaker);
+
+    repoCountMetricRegister.start();
+
+    assertEquals(1, fakeMetricMaker.actionMap.size());
+
+    @SuppressWarnings("rawtypes")
+    Optional<Supplier> obj = fakeMetricMaker.getValueForMetric(repoCountMetricName);
+
+    assertTrue(!obj.isEmpty());
+    assertEquals(0, ((Long) obj.get().get()).longValue());
+
+    fakeProjectCache.setProjectCount(2);
+
+    assertEquals(2, ((Long) obj.get().get()).longValue());
+  }
+}