diff --git a/blog/classes/external.php b/blog/classes/external.php
new file mode 100644
index 0000000000000..9333d2b31935b
--- /dev/null
+++ b/blog/classes/external.php
@@ -0,0 +1,180 @@
+<?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/>.
+
+/**
+ * This is the external API for blogs.
+ *
+ * @package    core_blog
+ * @copyright  2018 Juan Leyva
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace core_blog;
+defined('MOODLE_INTERNAL') || die();
+
+require_once($CFG->libdir .'/externallib.php');
+require_once($CFG->dirroot .'/blog/lib.php');
+require_once($CFG->dirroot .'/blog/locallib.php');
+
+use external_api;
+use external_function_parameters;
+use external_value;
+use external_single_structure;
+use external_multiple_structure;
+use external_warnings;
+use context_system;
+use context_course;
+use moodle_exception;
+use core_blog\external\post_exporter;
+
+/**
+ * This is the external API for blogs.
+ *
+ * @copyright  2018 Juan Leyva
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class external extends external_api {
+
+    /**
+     * Returns description of get_entries() parameters.
+     *
+     * @return external_function_parameters
+     * @since  Moodle 3.6
+     */
+    public static function get_entries_parameters() {
+        return new external_function_parameters(
+            array(
+                'filters' => new external_multiple_structure (
+                    new external_single_structure(
+                        array(
+                            'name' => new external_value(PARAM_ALPHA,
+                                'The expected keys (value format) are:
+                                tag      PARAM_NOTAGS blog tag
+                                tagid    PARAM_INT    blog tag id
+                                userid   PARAM_INT    blog author (userid)
+                                cmid    PARAM_INT    course module id
+                                entryid  PARAM_INT    entry id
+                                groupid  PARAM_INT    group id
+                                courseid PARAM_INT    course id
+                                search   PARAM_RAW    search term
+                                '
+                            ),
+                            'value' => new external_value(PARAM_RAW, 'The value of the filter.')
+                        )
+                    ), 'Parameters to filter blog listings.', VALUE_DEFAULT, array()
+                ),
+                'page' => new external_value(PARAM_INT, 'The blog page to return.', VALUE_DEFAULT, 0),
+                'perpage' => new external_value(PARAM_INT, 'The number of posts to return per page.', VALUE_DEFAULT, 10),
+            )
+        );
+    }
+
+    /**
+     * Return blog entries.
+     *
+     * @param array $filters the parameters to filter the blog listing
+     * @param int $page the blog page to return
+     * @param int $perpage the number of posts to return per page
+     * @return array with the blog entries and warnings
+     * @since  Moodle 3.6
+     */
+    public static function get_entries($filters = array(), $page = 0, $perpage = 10) {
+        global $CFG, $DB, $PAGE;
+
+        $warnings = array();
+        $params = self::validate_parameters(self::get_entries_parameters(),
+            array('filters' => $filters, 'page' => $page, 'perpage' => $perpage));
+
+        if (empty($CFG->enableblogs)) {
+            throw new moodle_exception('blogdisable', 'blog');
+        }
+
+        // Init filters.
+        $filterstype = array('courseid' => PARAM_INT, 'groupid' => PARAM_INT, 'userid' => PARAM_INT, 'tagid' => PARAM_INT,
+            'tag' => PARAM_NOTAGS, 'cmid' => PARAM_INT, 'entryid' => PARAM_INT, 'search' => PARAM_RAW);
+        $filters = array('courseid' => null, 'groupid' => null, 'userid' => null, 'tagid' => null,
+            'tag' => null, 'cmid' => null, 'entryid' => null, 'search' => null);
+
+        foreach ($params['filters'] as $filter) {
+            $name = trim($filter['name']);
+            if (!isset($filterstype[$name])) {
+                throw new moodle_exception('errorinvalidparam', 'webservice', '', $name);
+            }
+            $filters[$name] = clean_param($filter['value'], $filterstype[$name]);
+        }
+
+        // Do not overwrite here the filters, blog_get_headers and blog_listing will take care of that.
+        list($courseid, $userid) = blog_validate_access($filters['courseid'], $filters['cmid'], $filters['groupid'],
+            $filters['entryid'], $filters['userid']);
+
+        if ($courseid && $courseid != SITEID) {
+            $context = context_course::instance($courseid);
+            self::validate_context($context);
+        } else {
+            $context = context_system::instance();
+            if ($CFG->bloglevel == BLOG_GLOBAL_LEVEL) {
+                // Everybody can see anything - no login required unless site is locked down using forcelogin.
+                if ($CFG->forcelogin) {
+                    self::validate_context($context);
+                }
+            } else {
+                self::validate_context($context);
+            }
+        }
+        $PAGE->set_context($context); // Needed by internal APIs.
+
+        // Get filters.
+        $blogheaders = blog_get_headers($filters['courseid'], $filters['groupid'], $filters['userid'], $filters['tagid'],
+            $filters['tag'], $filters['cmid'], $filters['entryid'], $filters['search']);
+        $bloglisting = new \blog_listing($blogheaders['filters']);
+
+        $page  = $params['page'];
+        $limit = empty($params['perpage']) ? get_user_preferences('blogpagesize', 10) : $params['perpage'];
+        $start = $page * $limit;
+        $entries = $bloglisting->get_entries($start, $limit);
+        $totalentries = $bloglisting->count_entries();
+
+        $exportedentries = array();
+        $output = $PAGE->get_renderer('core');
+        foreach ($entries as $entry) {
+            $exporter = new post_exporter($entry, array('context' => $context));
+            $exportedentries[] = $exporter->export($output);
+        }
+        return array(
+            'warnings' => $warnings,
+            'entries' => $exportedentries,
+            'totalentries' => $totalentries,
+        );
+    }
+
+    /**
+     * Returns description of get_entries() result value.
+     *
+     * @return external_description
+     * @since  Moodle 3.6
+     */
+    public static function get_entries_returns() {
+        return new external_single_structure(
+            array(
+                'entries' => new external_multiple_structure(
+                    post_exporter::get_read_structure()
+                ),
+                'totalentries' => new external_value(PARAM_INT, 'The total number of entries found.'),
+                'warnings' => new external_warnings(),
+            )
+        );
+    }
+}
diff --git a/blog/classes/external/post_exporter.php b/blog/classes/external/post_exporter.php
new file mode 100644
index 0000000000000..3d69299ef6045
--- /dev/null
+++ b/blog/classes/external/post_exporter.php
@@ -0,0 +1,185 @@
+<?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/>.
+
+/**
+ * Class for exporting a blog post (entry).
+ *
+ * @package    core_blog
+ * @copyright  2018 Juan Leyva <juan@moodle.com>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+namespace core_blog\external;
+defined('MOODLE_INTERNAL') || die();
+
+use core\external\exporter;
+use external_util;
+use external_files;
+use renderer_base;
+use context_system;
+
+/**
+ * Class for exporting a blog post (entry).
+ *
+ * @copyright  2018 Juan Leyva <juan@moodle.com>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class post_exporter extends exporter {
+
+    /**
+     * Return the list of properties.
+     *
+     * @return array list of properties
+     */
+    protected static function define_properties() {
+        return array(
+            'id' => array(
+                'type' => PARAM_INT,
+                'null' => NULL_ALLOWED,
+                'description' => 'Post/entry id.',
+            ),
+            'module' => array(
+                'type' => PARAM_ALPHANUMEXT,
+                'null' => NULL_NOT_ALLOWED,
+                'description' => 'Where it was published the post (blog, blog_external...).',
+            ),
+            'userid' => array(
+                'type' => PARAM_INT,
+                'null' => NULL_NOT_ALLOWED,
+                'default' => 0,
+                'description' => 'Post author.',
+            ),
+            'courseid' => array(
+                'type' => PARAM_INT,
+                'null' => NULL_NOT_ALLOWED,
+                'default' => 0,
+                'description' => 'Course where the post was created.',
+            ),
+            'groupid' => array(
+                'type' => PARAM_INT,
+                'null' => NULL_NOT_ALLOWED,
+                'default' => 0,
+                'description' => 'Group post was created for.',
+            ),
+            'moduleid' => array(
+                'type' => PARAM_INT,
+                'null' => NULL_NOT_ALLOWED,
+                'default' => 0,
+                'description' => 'Module id where the post was created (not used anymore).',
+            ),
+            'coursemoduleid' => array(
+                'type' => PARAM_INT,
+                'null' => NULL_NOT_ALLOWED,
+                'default' => 0,
+                'description' => 'Course module id where the post was created.',
+            ),
+            'subject' => array(
+                'type' => PARAM_TEXT,
+                'null' => NULL_NOT_ALLOWED,
+                'description' => 'Post subject.',
+            ),
+            'summary' => array(
+                'type' => PARAM_RAW,
+                'null' => NULL_ALLOWED,
+                'description' => 'Post summary.',
+            ),
+            'content' => array(
+                'type' => PARAM_RAW,
+                'null' => NULL_ALLOWED,
+                'description' => 'Post content.',
+            ),
+            'uniquehash' => array(
+                'type' => PARAM_RAW,
+                'null' => NULL_NOT_ALLOWED,
+                'description' => 'Post unique hash.',
+            ),
+            'rating' => array(
+                'type' => PARAM_INT,
+                'null' => NULL_NOT_ALLOWED,
+                'default' => 0,
+                'description' => 'Post rating.',
+            ),
+            'format' => array(
+                'type' => PARAM_INT,
+                'null' => NULL_NOT_ALLOWED,
+                'default' => 0,
+                'description' => 'Post content format.',
+            ),
+            'summaryformat' => array(
+                'choices' => array(FORMAT_HTML, FORMAT_MOODLE, FORMAT_PLAIN, FORMAT_MARKDOWN),
+                'type' => PARAM_INT,
+                'default' => FORMAT_MOODLE,
+                'description' => 'Format for the summary field.',
+            ),
+            'attachment' => array(
+                'type' => PARAM_RAW,
+                'null' => NULL_ALLOWED,
+                'description' => 'Post atachment.',
+            ),
+            'publishstate' => array(
+                'type' => PARAM_ALPHA,
+                'null' => NULL_NOT_ALLOWED,
+                'default' => 'draft',
+                'description' => 'Post publish state.',
+            ),
+            'lastmodified' => array(
+                'type' => PARAM_INT,
+                'null' => NULL_NOT_ALLOWED,
+                'default' => 0,
+                'description' => 'When it was last modified.',
+            ),
+            'created' => array(
+                'type' => PARAM_INT,
+                'null' => NULL_NOT_ALLOWED,
+                'default' => 0,
+                'description' => 'When it was created.',
+            ),
+            'usermodified' => array(
+                'type' => PARAM_INT,
+                'null' => NULL_ALLOWED,
+                'description' => 'User that updated the post.',
+            ),
+        );
+    }
+
+    protected static function define_related() {
+        return array(
+            'context' => 'context'
+        );
+    }
+
+    protected static function define_other_properties() {
+        return array(
+            'summaryfiles' => array(
+                'type' => external_files::get_properties_for_exporter(),
+                'multiple' => true
+            ),
+            'attachmentfiles' => array(
+                'type' => external_files::get_properties_for_exporter(),
+                'multiple' => true,
+                'optional' => true
+            ),
+        );
+    }
+
+    protected function get_other_values(renderer_base $output) {
+        $context = context_system::instance(); // Files always on site context.
+
+        $values['summaryfiles'] = external_util::get_area_files($context->id, 'blog', 'post', $this->data->id);
+        $values['attachmentfiles'] = external_util::get_area_files($context->id, 'blog', 'attachment', $this->data->id);
+
+        return $values;
+    }
+}
diff --git a/blog/tests/external_test.php b/blog/tests/external_test.php
new file mode 100644
index 0000000000000..016865c92c25b
--- /dev/null
+++ b/blog/tests/external_test.php
@@ -0,0 +1,565 @@
+<?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/>.
+
+/**
+ * Unit tests for blog external API.
+ *
+ * @package    core_blog
+ * @copyright  2018 Juan Leyva
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+defined('MOODLE_INTERNAL') || die();
+
+global $CFG;
+require_once($CFG->dirroot . '/blog/locallib.php');
+require_once($CFG->dirroot . '/blog/lib.php');
+
+/**
+ * Unit tests for blog external API.
+ *
+ * @package    core_blog
+ * @copyright  2018 Juan Leyva
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class core_blog_external_testcase extends advanced_testcase {
+
+    private $courseid;
+    private $cmid;
+    private $userid;
+    private $groupid;
+    private $tagid;
+    private $postid;
+
+    protected function setUp() {
+        global $DB, $CFG;
+        parent::setUp();
+
+        $this->resetAfterTest();
+
+        // Create default course.
+        $course = $this->getDataGenerator()->create_course(array('category' => 1, 'shortname' => 'ANON'));
+        $this->assertNotEmpty($course);
+        $page = $this->getDataGenerator()->create_module('page', array('course' => $course->id));
+        $this->assertNotEmpty($page);
+
+        // Create default user.
+        $user = $this->getDataGenerator()->create_user(array(
+                'username' => 'testuser',
+                'firstname' => 'Jimmy',
+                'lastname' => 'Kinnon'
+        ));
+        // Enrol user.
+        $this->getDataGenerator()->enrol_user($user->id, $course->id);
+
+        $group = $this->getDataGenerator()->create_group(array('courseid' => $course->id));
+        $this->getDataGenerator()->create_group_member(array('groupid' => $group->id, 'userid' => $user->id));
+
+        // Create default post.
+        $post = new stdClass();
+        $post->userid = $user->id;
+        $post->courseid = $course->id;
+        $post->groupid = $group->id;
+        $post->content = 'test post content text';
+        $post->module = 'blog';
+        $post->id = $DB->insert_record('post', $post);
+
+        core_tag_tag::set_item_tags('core', 'post', $post->id, context_user::instance($user->id), array('tag1'));
+        $tagid = $DB->get_field('tag', 'id', array('name' => 'tag1'));
+
+        // Grab important ids.
+        $this->courseid = $course->id;
+        $this->cmid = $page->cmid;
+        $this->userid  = $user->id;
+        $this->groupid  = $group->id;
+        $this->tagid  = $tagid;
+        $this->postid = $post->id;
+        $this->publishstate = 'site';   // To be override in tests.
+
+        // Set default blog level.
+        $CFG->bloglevel = BLOG_SITE_LEVEL;
+    }
+
+    /**
+     * Get global public entries even for not authenticated users.
+     * We get the entry since is public.
+     */
+    public function test_get_public_entries_global_level_by_non_logged_users() {
+        global $CFG, $DB;
+
+        $CFG->bloglevel = BLOG_GLOBAL_LEVEL;
+        $CFG->forcelogin = 0;
+        // Set current entry global.
+        $DB->set_field('post', 'publishstate', 'public', array('id' => $this->postid));
+
+        $result = core_blog\external::get_entries();
+        $result = external_api::clean_returnvalue(core_blog\external::get_entries_returns(), $result);
+        $this->assertCount(1, $result['entries']);
+        $this->assertEquals($this->postid, $result['entries'][0]['id']);
+    }
+
+    /**
+     * Get global public entries even for not authenticated users in closed site.
+     */
+    public function test_get_public_entries_global_level_by_non_logged_users_closed_site() {
+        global $CFG, $DB;
+
+        $CFG->bloglevel = BLOG_GLOBAL_LEVEL;
+        $CFG->forcelogin = 1;
+        // Set current entry global.
+        $DB->set_field('post', 'publishstate', 'public', array('id' => $this->postid));
+
+        $this->expectException('moodle_exception');
+        core_blog\external::get_entries();
+    }
+
+    /**
+     * Get global public entries for guest users.
+     * We get the entry since is public.
+     */
+    public function test_get_public_entries_global_level_by_guest_users() {
+        global $CFG, $DB;
+
+        $CFG->bloglevel = BLOG_GLOBAL_LEVEL;
+        // Set current entry global.
+        $DB->set_field('post', 'publishstate', 'public', array('id' => $this->postid));
+
+        $this->setGuestUser();
+        $result = core_blog\external::get_entries();
+        $result = external_api::clean_returnvalue(core_blog\external::get_entries_returns(), $result);
+        $this->assertCount(1, $result['entries']);
+        $this->assertEquals($this->postid, $result['entries'][0]['id']);
+    }
+
+    /**
+     * Get global not public entries even for not authenticated users withouth being authenticated.
+     * We don't get any because they are not public (restricted to site users).
+     */
+    public function test_get_not_public_entries_global_level_by_non_logged_users() {
+        global $CFG;
+
+        $CFG->bloglevel = BLOG_GLOBAL_LEVEL;
+
+        $result = core_blog\external::get_entries();
+        $result = external_api::clean_returnvalue(core_blog\external::get_entries_returns(), $result);
+        $this->assertCount(0, $result['entries']);
+    }
+
+    /**
+     * Get global not public entries users being guest.
+     * We don't get any because they are not public (restricted to real site users).
+     */
+    public function test_get_not_public_entries_global_level_by_guest_user() {
+        global $CFG;
+
+        $CFG->bloglevel = BLOG_GLOBAL_LEVEL;
+
+        $this->setGuestUser();
+        $result = core_blog\external::get_entries();
+        $result = external_api::clean_returnvalue(core_blog\external::get_entries_returns(), $result);
+        $this->assertCount(0, $result['entries']);
+    }
+
+    /**
+     * Get site not public entries for not authenticated users.
+     * We don't get any because they are not public (restricted to real site users).
+     */
+    public function test_get_not_public_entries_site_level_by_non_logged_users() {
+        $this->expectException('require_login_exception'); // In this case we get a security exception.
+        $result = core_blog\external::get_entries();
+    }
+
+    /**
+     * Get site not public entries for guest users.
+     * We don't get any because they are not public (restricted to real site users).
+     */
+    public function test_get_not_public_entries_site_level_by_guest_users() {
+
+        $this->setGuestUser();
+        $result = core_blog\external::get_entries();
+        $result = external_api::clean_returnvalue(core_blog\external::get_entries_returns(), $result);
+        $this->assertCount(0, $result['entries']);
+    }
+
+    /**
+     * Get site entries at site level by system users.
+     */
+    public function test_get_site_entries_site_level_by_normal_users() {
+
+        $this->setUser($this->userid);
+        $result = core_blog\external::get_entries();
+        $result = external_api::clean_returnvalue(core_blog\external::get_entries_returns(), $result);
+        $this->assertCount(1, $result['entries']);
+        $this->assertEquals($this->postid, $result['entries'][0]['id']);
+    }
+
+    /**
+     * Get draft site entries by authors.
+     */
+    public function test_get_draft_entries_site_level_by_author_users() {
+        global $DB;
+
+        // Set current entry global.
+        $DB->set_field('post', 'publishstate', 'draft', array('id' => $this->postid));
+
+        $this->setUser($this->userid);
+        $result = core_blog\external::get_entries();
+        $result = external_api::clean_returnvalue(core_blog\external::get_entries_returns(), $result);
+        $this->assertCount(1, $result['entries']);
+        $this->assertEquals($this->postid, $result['entries'][0]['id']);
+    }
+
+    /**
+     * Get draft site entries by not authors.
+     */
+    public function test_get_draft_entries_site_level_by_not_author_users() {
+        global $DB;
+
+        // Set current entry global.
+        $DB->set_field('post', 'publishstate', 'draft', array('id' => $this->postid));
+        $user = $this->getDataGenerator()->create_user();
+
+        $this->setUser($user);
+        $result = core_blog\external::get_entries();
+        $result = external_api::clean_returnvalue(core_blog\external::get_entries_returns(), $result);
+        $this->assertCount(0, $result['entries']);
+    }
+
+    /**
+     * Get draft site entries by admin.
+     */
+    public function test_get_draft_entries_site_level_by_admin_users() {
+        global $DB;
+
+        // Set current entry global.
+        $DB->set_field('post', 'publishstate', 'draft', array('id' => $this->postid));
+        $user = $this->getDataGenerator()->create_user();
+
+        $this->setAdminUser();
+        $result = core_blog\external::get_entries();
+        $result = external_api::clean_returnvalue(core_blog\external::get_entries_returns(), $result);
+        $this->assertCount(1, $result['entries']);
+        $this->assertEquals($this->postid, $result['entries'][0]['id']);
+    }
+
+    /**
+     * Get draft user entries by authors.
+     */
+    public function test_get_draft_entries_user_level_by_author_users() {
+        global $CFG, $DB;
+
+        $CFG->bloglevel = BLOG_USER_LEVEL;
+        // Set current entry global.
+        $DB->set_field('post', 'publishstate', 'draft', array('id' => $this->postid));
+
+        $this->setUser($this->userid);
+        $result = core_blog\external::get_entries();
+        $result = external_api::clean_returnvalue(core_blog\external::get_entries_returns(), $result);
+        $this->assertCount(1, $result['entries']);
+        $this->assertEquals($this->postid, $result['entries'][0]['id']);
+    }
+
+    /**
+     * Get draft user entries by not authors.
+     */
+    public function test_get_draft_entries_user_level_by_not_author_users() {
+        global $CFG, $DB;
+
+        $CFG->bloglevel = BLOG_USER_LEVEL;
+        // Set current entry global.
+        $DB->set_field('post', 'publishstate', 'draft', array('id' => $this->postid));
+        $user = $this->getDataGenerator()->create_user();
+
+        $this->setUser($user);
+        $result = core_blog\external::get_entries();
+        $result = external_api::clean_returnvalue(core_blog\external::get_entries_returns(), $result);
+        $this->assertCount(0, $result['entries']);
+    }
+
+    /**
+     * Get draft user entries by admin.
+     */
+    public function test_get_draft_entries_user_level_by_admin_users() {
+        global $CFG, $DB;
+
+        $CFG->bloglevel = BLOG_USER_LEVEL;
+        // Set current entry global.
+        $DB->set_field('post', 'publishstate', 'draft', array('id' => $this->postid));
+        $user = $this->getDataGenerator()->create_user();
+
+        $this->setAdminUser();
+        $result = core_blog\external::get_entries();
+        $result = external_api::clean_returnvalue(core_blog\external::get_entries_returns(), $result);
+        $this->assertCount(1, $result['entries']);
+        $this->assertEquals($this->postid, $result['entries'][0]['id']);
+    }
+
+    /**
+     * Test get all entries including testing pagination.
+     */
+    public function test_get_all_entries_including_pagination() {
+        global $DB, $USER;
+
+        $DB->set_field('post', 'publishstate', 'site', array('id' => $this->postid));
+
+        // Create another entry.
+        $this->setAdminUser();
+        $newpost = new stdClass();
+        $newpost->userid = $USER->id;
+        $newpost->content = 'test post content text';
+        $newpost->module = 'blog';
+        $newpost->publishstate = 'site';
+        $newpost->created = time() + HOURSECS;
+        $newpost->lastmodified = time() + HOURSECS;
+        $newpost->id = $DB->insert_record('post', $newpost);
+
+        $this->setUser($this->userid);
+        $result = core_blog\external::get_entries();
+        $result = external_api::clean_returnvalue(core_blog\external::get_entries_returns(), $result);
+        $this->assertCount(2, $result['entries']);
+        $this->assertEquals(2, $result['totalentries']);
+
+        $result = core_blog\external::get_entries(array(), 0, 1);
+        $result = external_api::clean_returnvalue(core_blog\external::get_entries_returns(), $result);
+        $this->assertCount(1, $result['entries']);
+        $this->assertEquals(2, $result['totalentries']);
+        $this->assertEquals($newpost->id, $result['entries'][0]['id']);
+
+        $result = core_blog\external::get_entries(array(), 1, 1);
+        $result = external_api::clean_returnvalue(core_blog\external::get_entries_returns(), $result);
+        $this->assertCount(1, $result['entries']);
+        $this->assertEquals(2, $result['totalentries']);
+        $this->assertEquals($this->postid, $result['entries'][0]['id']);
+    }
+
+    /**
+     * Test get entries filtering by course.
+     */
+    public function test_get_entries_filtering_by_course() {
+        global $CFG, $DB;
+
+        $DB->set_field('post', 'publishstate', 'site', array('id' => $this->postid));
+
+        $this->setAdminUser();
+        $coursecontext = context_course::instance($this->courseid);
+        $anothercourse = $this->getDataGenerator()->create_course();
+
+        // Add blog associations with a course.
+        $blog = new blog_entry($this->postid);
+        $blog->add_association($coursecontext->id);
+
+        // There is one entry associated with a course.
+        $result = core_blog\external::get_entries(array(array('name' => 'courseid', 'value' => $this->courseid)));
+        $result = external_api::clean_returnvalue(core_blog\external::get_entries_returns(), $result);
+        $this->assertCount(1, $result['entries']);
+
+        // There is no entry associated with a wrong course.
+        $result = core_blog\external::get_entries(array(array('name' => 'courseid', 'value' => $anothercourse->id)));
+        $result = external_api::clean_returnvalue(core_blog\external::get_entries_returns(), $result);
+        $this->assertCount(0, $result['entries']);
+
+        // There is no entry associated with a module.
+        $result = core_blog\external::get_entries(array(array('name' => 'cmid', 'value' => $this->cmid)));
+        $result = external_api::clean_returnvalue(core_blog\external::get_entries_returns(), $result);
+        $this->assertCount(0, $result['entries']);
+    }
+
+    /**
+     * Test get entries filtering by module.
+     */
+    public function test_get_entries_filtering_by_module() {
+        global $CFG, $DB;
+
+        $DB->set_field('post', 'publishstate', 'site', array('id' => $this->postid));
+
+        $this->setAdminUser();
+        $coursecontext = context_course::instance($this->courseid);
+        $contextmodule = context_module::instance($this->cmid);
+        $anothermodule = $this->getDataGenerator()->create_module('page', array('course' => $this->courseid));
+
+        // Add blog associations with a module.
+        $blog = new blog_entry($this->postid);
+        $blog->add_association($contextmodule->id);
+
+        // There is no entry associated with a course.
+        $result = core_blog\external::get_entries(array(array('name' => 'courseid', 'value' => $this->courseid)));
+        $result = external_api::clean_returnvalue(core_blog\external::get_entries_returns(), $result);
+        $this->assertCount(0, $result['entries']);
+
+        // There is one entry associated with a module.
+        $result = core_blog\external::get_entries(array(array('name' => 'cmid', 'value' => $this->cmid)));
+        $result = external_api::clean_returnvalue(core_blog\external::get_entries_returns(), $result);
+        $this->assertCount(1, $result['entries']);
+
+        // There is no entry associated with a wrong module.
+        $result = core_blog\external::get_entries(array(array('name' => 'cmid', 'value' => $anothermodule->cmid)));
+        $result = external_api::clean_returnvalue(core_blog\external::get_entries_returns(), $result);
+        $this->assertCount(0, $result['entries']);
+    }
+
+    /**
+     * Test get entries filtering by author.
+     */
+    public function test_get_entries_filtering_by_author() {
+        $this->setAdminUser();
+        // Filter by author.
+        $result = core_blog\external::get_entries(array(array('name' => 'userid', 'value' => $this->userid)));
+        $result = external_api::clean_returnvalue(core_blog\external::get_entries_returns(), $result);
+        $this->assertCount(1, $result['entries']);
+        // No author.
+        $anotheruser = $this->getDataGenerator()->create_user();
+        $result = core_blog\external::get_entries(array(array('name' => 'userid', 'value' => $anotheruser->id)));
+        $result = external_api::clean_returnvalue(core_blog\external::get_entries_returns(), $result);
+        $this->assertCount(0, $result['entries']);
+    }
+
+    /**
+     * Test get entries filtering by entry.
+     */
+    public function test_get_entries_filtering_by_entry() {
+        $this->setAdminUser();
+        // Filter by correct entry.
+        $result = core_blog\external::get_entries(array(array('name' => 'entryid', 'value' => $this->postid)));
+        $result = external_api::clean_returnvalue(core_blog\external::get_entries_returns(), $result);
+        $this->assertCount(1, $result['entries']);
+        // Non-existent entry.
+        $this->expectException('moodle_exception');
+        $result = core_blog\external::get_entries(array(array('name' => 'entryid', 'value' => -1)));
+    }
+
+    /**
+     * Test get entries filtering by search.
+     */
+    public function test_get_entries_filtering_by_search() {
+        $this->setAdminUser();
+        // Filter by correct search.
+        $result = core_blog\external::get_entries(array(array('name' => 'search', 'value' => 'test')));
+        $result = external_api::clean_returnvalue(core_blog\external::get_entries_returns(), $result);
+        $this->assertCount(1, $result['entries']);
+        // Non-existent search.
+        $result = core_blog\external::get_entries(array(array('name' => 'search', 'value' => 'abc')));
+        $result = external_api::clean_returnvalue(core_blog\external::get_entries_returns(), $result);
+        $this->assertCount(0, $result['entries']);
+    }
+
+    /**
+     * Test get entries filtering by tag.
+     */
+    public function test_get_entries_filtering_by_tag() {
+        $this->setAdminUser();
+        // Filter by correct tag.
+        $result = core_blog\external::get_entries(array(array('name' => 'tag', 'value' => 'tag1')));
+        $result = external_api::clean_returnvalue(core_blog\external::get_entries_returns(), $result);
+        $this->assertCount(1, $result['entries']);
+        // Create tag.
+        $tag = $this->getDataGenerator()->create_tag(array('userid' => $this->userid, 'name' => 'tag2',
+            'isstandard' => 1));
+
+        $result = core_blog\external::get_entries(array(array('name' => 'tag', 'value' => 'tag2')));
+        $result = external_api::clean_returnvalue(core_blog\external::get_entries_returns(), $result);
+        $this->assertCount(0, $result['entries']);
+    }
+
+    /**
+     * Test get entries filtering by tag id.
+     */
+    public function test_get_entries_filtering_by_tagid() {
+        $this->setAdminUser();
+        // Filter by correct tag.
+        $result = core_blog\external::get_entries(array(array('name' => 'tagid', 'value' => $this->tagid)));
+        $result = external_api::clean_returnvalue(core_blog\external::get_entries_returns(), $result);
+        $this->assertCount(1, $result['entries']);
+        // Non-existent tag.
+
+        // Create tag.
+        $tag = $this->getDataGenerator()->create_tag(array('userid' => $this->userid, 'name' => 'tag2',
+            'isstandard' => 1));
+
+        $result = core_blog\external::get_entries(array(array('name' => 'tagid', 'value' => $tag->id)));
+        $result = external_api::clean_returnvalue(core_blog\external::get_entries_returns(), $result);
+        $this->assertCount(0, $result['entries']);
+    }
+
+    /**
+     * Test get entries filtering by group.
+     */
+    public function test_get_entries_filtering_by_group() {
+        $this->setAdminUser();
+        // Add blog associations with a course.
+        $coursecontext = context_course::instance($this->courseid);
+        $blog = new blog_entry($this->postid);
+        $blog->add_association($coursecontext->id);
+
+        // Filter by correct group.
+        $result = core_blog\external::get_entries(array(array('name' => 'groupid', 'value' => $this->groupid)));
+        $result = external_api::clean_returnvalue(core_blog\external::get_entries_returns(), $result);
+        $this->assertCount(1, $result['entries']);
+        // Non-existent group.
+        $anotheruser = $this->getDataGenerator()->create_user();
+        $this->expectException('moodle_exception');
+        core_blog\external::get_entries(array(array('name' => 'groupid', 'value' => -1)));
+    }
+
+    /**
+     * Test get entries multiple filter.
+     */
+    public function test_get_entries_multiple_filter() {
+        $this->setAdminUser();
+        // Add blog associations with a course.
+        $coursecontext = context_course::instance($this->courseid);
+        $blog = new blog_entry($this->postid);
+        $blog->add_association($coursecontext->id);
+
+        $result = core_blog\external::get_entries(array(
+            array('name' => 'tagid', 'value' => $this->tagid),
+            array('name' => 'userid', 'value' => $this->userid),
+        ));
+        $result = external_api::clean_returnvalue(core_blog\external::get_entries_returns(), $result);
+        $this->assertCount(1, $result['entries']);
+
+        // Non-existent multiple filter.
+        $result = core_blog\external::get_entries(array(
+            array('name' => 'search', 'value' => 'www'),
+            array('name' => 'userid', 'value' => $this->userid),
+        ));
+        $result = external_api::clean_returnvalue(core_blog\external::get_entries_returns(), $result);
+        $this->assertCount(0, $result['entries']);
+    }
+
+    /**
+     * Test get entries filtering by invalid_filter.
+     */
+    public function test_get_entries_filtering_by_invalid_filter() {
+        $this->setAdminUser();
+        // Filter by incorrect filter.
+        $this->expectException('moodle_exception');
+        $result = core_blog\external::get_entries(array(array('name' => 'zzZZzz', 'value' => 'wwWWww')));
+    }
+
+    /**
+     * Test get entries when blog is disabled.
+     */
+    public function test_get_entries_blog_disabled() {
+        global $CFG;
+
+        $this->setAdminUser();
+        $CFG->enableblogs = 0;
+        // Filter by incorrect filter.
+        $this->expectException('moodle_exception');
+        $result = core_blog\external::get_entries(array(array('name' => 'zzZZzz', 'value' => 'wwWWww')));
+    }
+}
+
diff --git a/lib/db/services.php b/lib/db/services.php
index 08195cc6bd1c0..973ca1f1aa785 100644
--- a/lib/db/services.php
+++ b/lib/db/services.php
@@ -74,6 +74,15 @@
         'capabilities'  => 'moodle/badges:viewotherbadges',
         'services'      => array(MOODLE_OFFICIAL_MOBILE_SERVICE),
     ),
+    'core_blog_get_entries' => array(
+        'classname'   => 'core_blog\external',
+        'methodname'  => 'get_entries',
+        'description' => 'Returns blog entries.',
+        'type'        => 'read',
+        'services'    => array(MOODLE_OFFICIAL_MOBILE_SERVICE),
+        'ajax'          => true,
+        'loginrequired' => false,
+    ),
     'core_calendar_get_calendar_monthly_view' => array(
         'classname' => 'core_calendar_external',
         'methodname' => 'get_calendar_monthly_view',
diff --git a/version.php b/version.php
index 3ee8253c3c0eb..bd986811c0ab7 100644
--- a/version.php
+++ b/version.php
@@ -29,7 +29,7 @@
 
 defined('MOODLE_INTERNAL') || die();
 
-$version  = 2018092700.01;              // YYYYMMDD      = weekly release date of this DEV branch.
+$version  = 2018092700.02;              // YYYYMMDD      = weekly release date of this DEV branch.
                                         //         RR    = release increments - 00 in DEV branches.
                                         //           .XX = incremental changes.