diff --git a/lib/db/services.php b/lib/db/services.php
index 3bf4a0748d8..61b5752734e 100644
--- a/lib/db/services.php
+++ b/lib/db/services.php
@@ -1132,7 +1132,7 @@ $functions = array(
     ),
 
     // Tag functions.
-   'core_tag_update_tags' => array(
+    'core_tag_update_tags' => array(
         'classname'   => 'core_tag_external',
         'methodname'  => 'update_tags',
         'description' => 'Updates tags',
@@ -1269,6 +1269,7 @@ $services = array(
             'mod_lti_view_lti',
             'mod_imscp_view_imscp',
             'mod_imscp_get_imscps_by_courses',
+            'mod_glossary_get_glossaries_by_courses',
             ),
         'enabled' => 0,
         'restrictedusers' => 0,
diff --git a/mod/glossary/classes/external.php b/mod/glossary/classes/external.php
new file mode 100644
index 00000000000..65c8bf3f044
--- /dev/null
+++ b/mod/glossary/classes/external.php
@@ -0,0 +1,160 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Glossary module external API.
+ *
+ * @package    mod_glossary
+ * @category   external
+ * @copyright  2015 Costantino Cito <ccito@cvaconsulting.com>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ * @since      Moodle 3.1
+ */
+defined('MOODLE_INTERNAL') || die;
+require_once($CFG->libdir . '/externallib.php');
+
+/**
+ * Glossary module external functions.
+ *
+ * @package    mod_glossary
+ * @category   external
+ * @copyright  2015 Costantino Cito <ccito@cvaconsulting.com>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ * @since      Moodle 3.1
+ */
+class mod_glossary_external extends external_api {
+
+    /**
+     * Describes the parameters for get_glossaries_by_courses.
+     *
+     * @return external_external_function_parameters
+     * @since Moodle 3.1
+     */
+    public static function get_glossaries_by_courses_parameters() {
+        return new external_function_parameters (
+            array(
+                'courseids' => new external_multiple_structure(
+                    new external_value(PARAM_INT, 'course id'),
+                    'Array of course IDs', VALUE_DEFAULT, array()
+                ),
+            )
+        );
+    }
+
+    /**
+     * Returns a list of glossaries in a provided list of courses.
+     *
+     * If no list is provided all glossaries that the user can view will be returned.
+     *
+     * @param array $courseids the course IDs.
+     * @return array of glossaries
+     * @since Moodle 3.1
+     */
+    public static function get_glossaries_by_courses($courseids = array()) {
+        $params = self::validate_parameters(self::get_glossaries_by_courses_parameters(), array('courseids' => $courseids));
+
+        $warnings = array();
+        $courses = array();
+        $courseids = $params['courseids'];
+
+        if (empty($courseids)) {
+            $courses = enrol_get_my_courses();
+            $courseids = array_keys($courses);
+        }
+
+        // Array to store the glossaries to return.
+        $glossaries = array();
+
+        // Ensure there are courseids to loop through.
+        if (!empty($courseids)) {
+            list($courses, $warnings) = external_util::validate_courses($courseids, $courses);
+
+            // Get the glossaries in these courses, this function checks users visibility permissions.
+            $glossaries = get_all_instances_in_courses('glossary', $courses);
+            foreach ($glossaries as $glossary) {
+                $context = context_module::instance($glossary->coursemodule);
+                $glossary->name = external_format_string($glossary->name, $context->id);
+                list($glossary->intro, $glossary->introformat) = external_format_text($glossary->intro, $glossary->introformat,
+                    $context->id, 'mod_glossary', 'intro', null);
+            }
+        }
+
+        $result = array();
+        $result['glossaries'] = $glossaries;
+        $result['warnings'] = $warnings;
+        return $result;
+    }
+
+    /**
+     * Describes the get_glossaries_by_courses return value.
+     *
+     * @return external_single_structure
+     * @since Moodle 3.1
+     */
+    public static function get_glossaries_by_courses_returns() {
+        return new external_single_structure(array(
+            'glossaries' => new external_multiple_structure(
+                new external_single_structure(array(
+                    'id' => new external_value(PARAM_INT, 'Glossary id'),
+                    'coursemodule' => new external_value(PARAM_INT, 'Course module id'),
+                    'course' => new external_value(PARAM_INT, 'Course id'),
+                    'name' => new external_value(PARAM_RAW, 'Glossary name'),
+                    'intro' => new external_value(PARAM_RAW, 'The Glossary intro'),
+                    'introformat' => new external_format_value('intro'),
+                    'allowduplicatedentries' => new external_value(PARAM_INT, 'If enabled, multiple entries can have the' .
+                        ' same concept name'),
+                    'displayformat' => new external_value(PARAM_TEXT, 'Display format type'),
+                    'mainglossary' => new external_value(PARAM_INT, 'If enabled this glossary is a main glossary.'),
+                    'showspecial' => new external_value(PARAM_INT, 'If enabled, participants can browse the glossary by' .
+                        ' special characters, such as @ and #'),
+                    'showalphabet' => new external_value(PARAM_INT, 'If enabled, participants can browse the glossary by' .
+                        ' letters of the alphabet'),
+                    'showall' => new external_value(PARAM_INT, 'If enabled, participants can browse all entries at once'),
+                    'allowcomments' => new external_value(PARAM_INT, 'If enabled, all participants with permission to' .
+                        ' create comments will be able to add comments to glossary entries'),
+                    'allowprintview' => new external_value(PARAM_INT, 'If enabled, students are provided with a link to a' .
+                        ' printer-friendly version of the glossary. The link is always available to teachers'),
+                    'usedynalink' => new external_value(PARAM_INT, 'If site-wide glossary auto-linking has been enabled' .
+                        ' by an administrator and this checkbox is ticked, the entry will be automatically linked' .
+                        ' wherever the concept words and phrases appear throughout the rest of the course.'),
+                    'defaultapproval' => new external_value(PARAM_INT, 'If set to no, entries require approving by a' .
+                        ' teacher before they are viewable by everyone.'),
+                    'approvaldisplayformat' => new external_value(PARAM_TEXT, 'When approving glossary items you may wish' .
+                        ' to use a different display format'),
+                    'globalglossary' => new external_value(PARAM_INT, ''),
+                    'entbypage' => new external_value(PARAM_INT, 'Entries shown per page'),
+                    'editalways' => new external_value(PARAM_INT, 'Always allow editing'),
+                    'rsstype' => new external_value(PARAM_INT, 'To enable the RSS feed for this activity, select either' .
+                        ' concepts with author or concepts without author to be included in the feed'),
+                    'rssarticles' => new external_value(PARAM_INT, 'This setting specifies the number of glossary entry' .
+                        ' concepts to include in the RSS feed. Between 5 and 20 generally acceptable'),
+                    'assessed' => new external_value(PARAM_INT, 'Aggregate type'),
+                    'assesstimestart' => new external_value(PARAM_INT, 'Restrict rating to items created after this'),
+                    'assesstimefinish' => new external_value(PARAM_INT, 'Restrict rating to items created before this'),
+                    'scale' => new external_value(PARAM_INT, 'Scale ID'),
+                    'timecreated' => new external_value(PARAM_INT, 'Time created'),
+                    'timemodified' => new external_value(PARAM_INT, 'Time modified'),
+                    'completionentries' => new external_value(PARAM_INT, 'Number of entries to complete'),
+                    'section' => new external_value(PARAM_INT, 'Section'),
+                    'visible' => new external_value(PARAM_INT, 'Visible'),
+                    'groupmode' => new external_value(PARAM_INT, 'Group mode'),
+                    'groupingid' => new external_value(PARAM_INT, 'Grouping ID'),
+                ), 'Glossaries')
+            ),
+            'warnings' => new external_warnings())
+        );
+    }
+}
diff --git a/mod/glossary/db/services.php b/mod/glossary/db/services.php
new file mode 100644
index 00000000000..fe26d6cd5b4
--- /dev/null
+++ b/mod/glossary/db/services.php
@@ -0,0 +1,38 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Glossary module external functions.
+ *
+ * @package    mod_glossary
+ * @category   external
+ * @copyright  2015 Frédéric Massart - FMCorz.net
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+defined('MOODLE_INTERNAL') || die();
+
+$functions = array(
+
+    'mod_glossary_get_glossaries_by_courses' => array(
+        'classname'     => 'mod_glossary_external',
+        'methodname'    => 'get_glossaries_by_courses',
+        'description'   => 'Retrieve a list of glossaries from several courses.',
+        'type'          => 'read',
+        'capabilities'  => 'mod/glossary:view'
+    ),
+
+);
diff --git a/mod/glossary/tests/external_test.php b/mod/glossary/tests/external_test.php
new file mode 100644
index 00000000000..405ba93fa17
--- /dev/null
+++ b/mod/glossary/tests/external_test.php
@@ -0,0 +1,88 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * External glossary functions unit tests
+ *
+ * @package    mod_glossary
+ * @category   external
+ * @copyright  2015 Costantino Cito <ccito@cvaconsulting.com>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+defined('MOODLE_INTERNAL') || die();
+global $CFG;
+require_once($CFG->dirroot . '/webservice/tests/helpers.php');
+
+/**
+ * External glossary functions unit tests
+ *
+ * @package    mod_glossary
+ * @category   external
+ * @copyright  2015 Costantino Cito <ccito@cvaconsulting.com>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class mod_glossary_external_testcase extends externallib_advanced_testcase {
+
+    /**
+     * Test get_glossaries_by_courses
+     */
+    public function test_get_glossaries_by_courses() {
+        $this->resetAfterTest(true);
+
+        // As admin.
+        $this->setAdminUser();
+        $c1 = self::getDataGenerator()->create_course();
+        $c2 = self::getDataGenerator()->create_course();
+        $g1 = self::getDataGenerator()->create_module('glossary', array('course' => $c1->id, 'name' => 'First Glossary'));
+        $g2 = self::getDataGenerator()->create_module('glossary', array('course' => $c1->id, 'name' => 'Second Glossary'));
+        $g3 = self::getDataGenerator()->create_module('glossary', array('course' => $c2->id, 'name' => 'Third Glossary'));
+
+        $s1 = $this->getDataGenerator()->create_user();
+        self::getDataGenerator()->enrol_user($s1->id,  $c1->id);
+
+        // Check results where student is enrolled.
+        $this->setUser($s1);
+        $glossaries = mod_glossary_external::get_glossaries_by_courses(array());
+        $glossaries = external_api::clean_returnvalue(mod_glossary_external::get_glossaries_by_courses_returns(), $glossaries);
+
+        $this->assertCount(2, $glossaries['glossaries']);
+        $this->assertEquals('First Glossary', $glossaries['glossaries'][0]['name']);
+        $this->assertEquals('Second Glossary', $glossaries['glossaries'][1]['name']);
+
+        // Check results with specific course IDs.
+        $glossaries = mod_glossary_external::get_glossaries_by_courses(array($c1->id, $c2->id));
+        $glossaries = external_api::clean_returnvalue(mod_glossary_external::get_glossaries_by_courses_returns(), $glossaries);
+
+        $this->assertCount(2, $glossaries['glossaries']);
+        $this->assertEquals('First Glossary', $glossaries['glossaries'][0]['name']);
+        $this->assertEquals('Second Glossary', $glossaries['glossaries'][1]['name']);
+
+        $this->assertEquals('course', $glossaries['warnings'][0]['item']);
+        $this->assertEquals($c2->id, $glossaries['warnings'][0]['itemid']);
+        $this->assertEquals('1', $glossaries['warnings'][0]['warningcode']);
+
+        // Now as admin.
+        $this->setAdminUser();
+
+        $glossaries = mod_glossary_external::get_glossaries_by_courses(array($c2->id));
+        $glossaries = external_api::clean_returnvalue(mod_glossary_external::get_glossaries_by_courses_returns(), $glossaries);
+
+        $this->assertCount(1, $glossaries['glossaries']);
+        $this->assertEquals('Third Glossary', $glossaries['glossaries'][0]['name']);
+    }
+
+}
diff --git a/mod/glossary/version.php b/mod/glossary/version.php
index b776316c910..66ae9ad42ab 100644
--- a/mod/glossary/version.php
+++ b/mod/glossary/version.php
@@ -24,7 +24,7 @@
 
 defined('MOODLE_INTERNAL') || die();
 
-$plugin->version   = 2015111600;       // The current module version (Date: YYYYMMDDXX)
+$plugin->version   = 2015111601;       // The current module version (Date: YYYYMMDDXX)
 $plugin->requires  = 2015111000;    // Requires this Moodle version
 $plugin->component = 'mod_glossary';   // Full name of the plugin (used for diagnostics)
 $plugin->cron      = 0;
diff --git a/version.php b/version.php
index b7bfddf0b34..3b24633f374 100644
--- a/version.php
+++ b/version.php
@@ -29,7 +29,7 @@
 
 defined('MOODLE_INTERNAL') || die();
 
-$version  = 2015120400.00;              // YYYYMMDD      = weekly release date of this DEV branch.
+$version  = 2015120400.02;              // YYYYMMDD      = weekly release date of this DEV branch.
                                         //         RR    = release increments - 00 in DEV branches.
                                         //           .XX = incremental changes.