Run the following code in console and check that both "Success" are written to console. Go to Network tab and check that only 1 request was done. var $mmSite = angular.element(document.querySelector('[ng-app]')).injector().get('$mmSite'), data = {userid: $mmSite.getUserId()}, preSets = {getFromCache: false};   $mmSite.read('core_enrol_get_users_courses', data, preSets).then(function(courses) { console.log('Success', courses.length); }); $mmSite.read('core_enrol_get_users_courses', data, preSets).then(function(courses) { console.log('Success', courses.length); }); Execute it again to see the request is done again. Run the following code in console and check that two heads are retrieved only once with different result: var $mmWS = angular.element(document.querySelector('[ng-app]')).injector().get('$mmWS'); $mmWS.getRemoteFileSize('http://i.telegraph.co.uk/multimedia/archive/03589/Wellcome_Image_Awa_3589699k.jpg').then(function(data) { console.log('FileSize ' + data); }); $mmWS.getRemoteFileMimeType('http://i.telegraph.co.uk/multimedia/archive/03589/Wellcome_Image_Awa_3589699k.jpg').then(function(data) { console.log('MimeType ' + data); });