diff --git a/lib/db/services.php b/lib/db/services.php
index c9318ffc6cc..913bbeb887f 100644
--- a/lib/db/services.php
+++ b/lib/db/services.php
@@ -772,6 +772,15 @@ $functions = array(
         'capabilities'  => '',
     ),
 
+    'core_message_get_blocked_users' => array(
+        'classname'     => 'core_message_external',
+        'methodname'    => 'get_blocked_users',
+        'classpath'     => 'message/externallib.php',
+        'description'   => 'Retrieve a list of users blocked',
+        'type'          => 'read',
+        'capabilities'  => '',
+    ),
+
     // === notes related functions ===
 
     'moodle_notes_create_notes' => array(
@@ -975,7 +984,9 @@ $services = array(
             'core_message_block_contacts',
             'core_message_unblock_contacts',
             'core_message_get_contacts',
-            'core_message_search_contacts'),
+            'core_message_search_contacts',
+            'core_message_get_blocked_users'
+            ),
         'enabled' => 0,
         'restrictedusers' => 0,
         'shortname' => MOODLE_OFFICIAL_MOBILE_SERVICE,
diff --git a/message/externallib.php b/message/externallib.php
index b1468ad9d8d..f1eb25c7029 100644
--- a/message/externallib.php
+++ b/message/externallib.php
@@ -829,6 +829,105 @@ class core_message_external extends external_api {
         );
     }
 
+    /**
+     * Get blocked users parameters description.
+     *
+     * @return external_function_parameters
+     * @since 2.9
+     */
+    public static function get_blocked_users_parameters() {
+        return new external_function_parameters(
+            array(
+                'userid' => new external_value(PARAM_INT,
+                                'the user whose blocked users we want to retrieve',
+                                VALUE_REQUIRED),
+            )
+        );
+    }
+
+    /**
+     * Retrieve a list of users blocked
+     *
+     * @param  int $userid the user whose blocked users we want to retrieve
+     * @return external_description
+     * @since 2.9
+     */
+    public static function get_blocked_users($userid) {
+        global $CFG, $USER;
+        require_once($CFG->dirroot . "/message/lib.php");
+
+        // Warnings array, it can be empty at the end but is mandatory.
+        $warnings = array();
+
+        // Validate params.
+        $params = array(
+            'userid' => $userid
+        );
+        $params = self::validate_parameters(self::get_blocked_users_parameters(), $params);
+        $userid = $params['userid'];
+
+        // Validate context.
+        $context = context_system::instance();
+        self::validate_context($context);
+
+        // Check if private messaging between users is allowed.
+        if (empty($CFG->messaging)) {
+            throw new moodle_exception('disabled', 'message');
+        }
+
+        $user = core_user::get_user($userid, 'id', MUST_EXIST);
+
+        // Check if we have permissions for retrieve the information.
+        if ($userid != $USER->id and !has_capability('moodle/site:readallmessages', $context)) {
+            throw new moodle_exception('accessdenied', 'admin');
+        }
+
+        // Now, we can get safely all the blocked users.
+        $users = message_get_blocked_users($user);
+
+        $blockedusers = array();
+        foreach ($users as $user) {
+            $newuser = array(
+                'id' => $user->id,
+                'fullname' => fullname($user),
+            );
+            $newuser['profileimageurl'] = moodle_url::make_webservice_pluginfile_url(
+                context_user::instance($user->id)->id, 'user', 'icon', null, '/', 'f1')->out(false);
+
+            $blockedusers[] = $newuser;
+        }
+
+        $results = array(
+            'users' => $blockedusers,
+            'warnings' => $warnings
+        );
+        return $results;
+    }
+
+    /**
+     * Get blocked users return description.
+     *
+     * @return external_single_structure
+     * @since 2.9
+     */
+    public static function get_blocked_users_returns() {
+        return new external_single_structure(
+            array(
+                'users' => new external_multiple_structure(
+                    new external_single_structure(
+                        array(
+                            'id' => new external_value(PARAM_INT, 'User ID'),
+                            'fullname' => new external_value(PARAM_NOTAGS, 'User full name'),
+                            'profileimageurl' => new external_value(PARAM_URL, 'User picture URL', VALUE_OPTIONAL)
+                        )
+                    ),
+                    'List of blocked users'
+                ),
+                'warnings' => new external_warnings()
+            )
+        );
+    }
+
 }
 
 /**
diff --git a/version.php b/version.php
index c60ff4de674..08c187e5ef6 100644
--- a/version.php
+++ b/version.php
@@ -29,7 +29,7 @@
 
 defined('MOODLE_INTERNAL') || die();
 
-$version  = 2015012900.00;              // YYYYMMDD      = weekly release date of this DEV branch.
+$version  = 2015012900.01;              // YYYYMMDD      = weekly release date of this DEV branch.
                                         //         RR    = release increments - 00 in DEV branches.
                                         //           .XX = incremental changes.