diff --git a/views/ngXosViews/diagnostic/src/js/rest_services.js b/views/ngXosViews/diagnostic/src/js/rest_services.js
new file mode 100644
index 0000000..beeb4fe
--- /dev/null
+++ b/views/ngXosViews/diagnostic/src/js/rest_services.js
@@ -0,0 +1,198 @@
+(function () {
+  'use strict';
+
+  angular.module('xos.serviceTopology')
+  .service('Services', function($resource){
+    return $resource('/xos/services/:id', {id: '@id'});
+  })
+  .service('Tenant', function($resource){
+    return $resource('/xos/tenants');
+  })
+  .service('Slice', function($resource){
+    return $resource('/xos/slices', {id: '@id'});
+  })
+  .service('Instances', function($resource){
+    return $resource('/xos/instances', {id: '@id'});
+  })
+  .service('Subscribers', function($resource, $q, SubscriberDevice){
+    return $resource('/xos/subscribers', {id: '@id'}, {
+      queryWithDevices: {
+        method: 'GET',
+        isArray: true,
+        interceptor: {
+          response: function(res){
+
+            /**
+            * For each subscriber retrieve devices and append them
+            */
+
+            const deferred = $q.defer();
+
+            let requests = [];
+
+            angular.forEach(res.data, (subscriber) => {
+              requests.push(SubscriberDevice.query({id: subscriber.id}).$promise);
+            })
+
+            $q.all(requests)
+            .then((list) => {
+              res.data.map((subscriber, i) => {
+                subscriber.devices = list[i];
+                return subscriber;
+              });
+
+              // faking to have 2 subscriber
+              res.data.push(res.data[0]);
+              deferred.resolve(res.data);
+            })
+
+            return deferred.promise;
+          }
+        }
+      }
+    });
+  })
+  .service('SubscriberDevice', function($resource){
+    return $resource('/xoslib/rs/subscriber/:id/users/', {id: '@id'});
+  })
+  .service('ServiceRelation', function($q, lodash, Services, Tenant, Slice, Instances){
+
+    // count the mas depth of an object
+    const depthOf = (obj) => {
+      var depth = 0;
+      if (obj.children) {
+        obj.children.forEach(function (d) {
+          var tmpDepth = depthOf(d);
+          if (tmpDepth > depth) {
+            depth = tmpDepth
+          }
+        })
+      }
+      return 1 + depth
+    };
+
+    // find all the relation defined for a given root
+    const findLevelRelation = (tenants, rootId) => {
+      return lodash.filter(tenants, service => {
+        return service.subscriber_service === rootId;
+      });
+    };
+
+    const findSpecificInformation = (tenants, rootId) => {
+      var tenants = lodash.filter(tenants, service => {
+        return service.provider_service === rootId && service.subscriber_tenant;
+      });
+
+      var info;
+
+      tenants.forEach((tenant) => {
+        if(tenant.service_specific_attribute){
+          info = JSON.parse(tenant.service_specific_attribute);
+        }
+      });
+
+      return info;
+    };
+
+    // find all the service defined by a given array of relations
+    const findLevelServices = (relations, services) => {
+      const levelServices = [];
+      lodash.forEach(relations, (tenant) => {
+        var service = lodash.find(services, {id: tenant.provider_service});
+        levelServices.push(service);
+      });
+      return levelServices;
+    };
+
+    const buildLevel = (tenants, services, rootService, parentName = null) => {
+
+      // build an array of unlinked services
+      // these are the services that should still placed in the tree
+      var unlinkedServices = lodash.difference(services, [rootService]);
+
+      // find all relations relative to this rootElement
+      const levelRelation = findLevelRelation(tenants, rootService.id);
+
+      // find all items related to rootElement
+      const levelServices = findLevelServices(levelRelation, services);
+
+      // remove this item from the list (performance
+      unlinkedServices = lodash.difference(unlinkedServices, levelServices);
+
+      rootService.service_specific_attribute = findSpecificInformation(tenants, rootService.id);
+
+      const tree = {
+        name: rootService.humanReadableName,
+        parent: parentName,
+        type: 'service',
+        service: rootService,
+        children: []
+      };
+
+      lodash.forEach(levelServices, (service) => {
+        tree.children.push(buildLevel(tenants, unlinkedServices, service, rootService.humanReadableName));
+      });
+
+      // if it is the last element append internet
+      if(tree.children.length === 0){
+        tree.children.push({
+          name: 'Internet',
+          type: 'internet',
+          children: []
+        });
+      }
+
+      return tree;
+    };
+
+    const buildServiceTree = (services, tenants, subscriber = {id: 1, name: 'fakeSubs'}) => {
+
+      // find the root service
+      // it is the one attached to subsriber_root
+      // as now we have only one root so this can work
+      const rootServiceId = lodash.find(tenants, {subscriber_root: subscriber.id}).provider_service;
+      const rootService = lodash.find(services, {id: rootServiceId});
+
+      const serviceTree = buildLevel(tenants, services, rootService);
+
+      return {
+        name: subscriber.name,
+        parent: null,
+        type: 'subscriber',
+        children: [serviceTree]
+      };
+
+    };
+
+    const get = (subscriber) => {
+      var deferred = $q.defer();
+      var services, tenants;
+      Services.query().$promise
+      .then((res) => {
+        services = res;
+        return Tenant.query().$promise;
+      })
+      .then((res) => {
+        tenants = res;
+        deferred.resolve(buildServiceTree(services, tenants, subscriber));
+      })
+      .catch((e) => {
+        throw new Error(e);
+      });
+
+      return deferred.promise;
+    };
+
+    // export APIs
+    return {
+      get: get,
+      buildLevel: buildLevel,
+      buildServiceTree: buildServiceTree,
+      findLevelRelation: findLevelRelation,
+      findLevelServices: findLevelServices,
+      depthOf: depthOf,
+      findSpecificInformation: findSpecificInformation
+    }
+  });
+
+}());
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