diff --git a/classes/checker.php b/classes/checker.php
index ca7b52f..c61f1a0 100644
--- a/classes/checker.php
+++ b/classes/checker.php
@@ -66,9 +66,11 @@ class checker {
      * If exceptions are thrown, they are caught and returned as result messages as well.
      * Note - OK results are not returned.
      *
+     * @param array $filters array of check ref strings to filter by
+     *
      * @return array array of resultmessage objects
      */
-    public static function get_check_messages(): array {
+    public static function get_check_messages(array $filters = []): array {
         // First try to get the checks, if this fails return a critical message (code is very broken).
         $checks = [];
 
@@ -86,12 +88,24 @@ public static function get_check_messages(): array {
 
         foreach ($checks as $check) {
             try {
+                if (!empty($filters) && !isset($filters[$check->get_ref()])) {
+                    continue;
+                }
                 $messages[] = self::process_check_and_get_result($check);
             } catch (Throwable $e) {
                 $messages[] = self::exception_to_message("Error processing check " . $check->get_ref() . ": ", $e);
             }
         }
 
+        // Nothing executed, return a warning message.
+        if (empty($messages) && !empty($filters)) {
+            $res = new resultmessage();
+            $res->level = resultmessage::LEVEL_WARN;
+            $res->title = "Invalid filter";
+            $res->message = "No checks were executed. Check the filter names.";
+            $messages[] = $res;
+        }
+
         // Add any output buffer message.
         $messages[] = self::get_ob_message();
 
diff --git a/croncheck.php b/croncheck.php
index 394d824..301b72b 100644
--- a/croncheck.php
+++ b/croncheck.php
@@ -43,11 +43,22 @@
 $dirroot = __DIR__ . '/../../../';
 require_once($dirroot . 'config.php');
 
+$filterids = [];
 if ($isweb) {
     // If run from the web.
     // Add requirement for IP validation.
     tool_heartbeat\lib::validate_ip_against_config();
 
+    $filterraw = optional_param('filter', '', PARAM_RAW_TRIMMED);
+    if (!empty($filterraw)) {
+        foreach (explode(',', $filterraw) as $id) {
+            $id = trim($id);
+            if ($id !== '') {
+                $filterids[$id] = true;
+            }
+        }
+    }
+
     header("Content-Type: text/plain");
 
     // Ensure its not cached.
@@ -72,7 +83,7 @@
 
 lib::process_error_log_ping();
 
-$messages = checker::get_check_messages();
+$messages = checker::get_check_messages($filterids);
 
 // Construct the output message.
 $PAGE->set_context(\context_system::instance());
@@ -80,7 +91,7 @@
 // Indent the messages.
 $msg = array_map(function($message) {
     global $OUTPUT;
-    
+
     $spacer = " ";
 
     // Add the spacer to the start of each message line.
@@ -88,7 +99,7 @@
     $indentedlines = array_map(function($line) use ($spacer) {
         return $spacer . $line;
     }, $indentedlines);
-    
+
     $indentedmessage = implode("\n", $indentedlines);
 
     return $OUTPUT->render_from_template('tool_heartbeat/resultmessage', [
diff --git a/tests/checker_test.php b/tests/checker_test.php
index 3710461..613ff4b 100644
--- a/tests/checker_test.php
+++ b/tests/checker_test.php
@@ -23,6 +23,7 @@
  * @author    Matthew Hilton <matthewhilton@catalyst-au.net>
  * @copyright 2023, Catalyst IT
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ * @covers    \tool_heartbeat\checker
  */
 final class checker_test extends \advanced_testcase {
     /**
@@ -40,6 +41,32 @@ public function test_get_check_messages(): void {
         $this->assertNotEmpty($checks);
     }
 
+    /**
+     * Tests get_check_messages function with filter
+     * @return void
+     */
+    public function test_get_check_messages_with_filter(): void {
+        // Check API modifies DB state.
+        $this->resetAfterTest(true);
+
+        // Filter which has a result.
+        ob_start();
+        $checks = checker::get_check_messages(['tool_task_cronrunning' => true]);
+        $this->assertNotEmpty($checks);
+
+        // Filter which doesn't have result.
+        ob_start();
+        $checks = checker::get_check_messages(['tool_task_adhocqueue' => true]);
+        $this->assertEmpty($checks);
+
+        // Filter by invalid value.
+        ob_start();
+        $checks = checker::get_check_messages(['tool_invalid_name' => true]);
+        $this->assertCount(1, $checks);
+        $check = reset($checks);
+        $this->assertEquals('Invalid filter', $check->title);
+    }
+
     /**
      * Provides values to determine_nagios_level test
      * @return array
diff --git a/version.php b/version.php
index ea6adf0..65cbb0f 100644
--- a/version.php
+++ b/version.php
@@ -24,8 +24,8 @@
 
 defined('MOODLE_INTERNAL') || die();
 
-$plugin->version   = 2024111803;
-$plugin->release   = 2024111803; // Match release exactly to version.
+$plugin->version   = 2025121600;
+$plugin->release   = 2025121600; // Match release exactly to version.
 $plugin->requires  = 2020061500; // Support for 3.9 and above, due to the Check API.
 $plugin->supported = [39, 405];
 $plugin->component = 'tool_heartbeat';