diff --git a/lib/configuration/hooks/jsonapi/helpers/request.js b/lib/configuration/hooks/jsonapi/helpers/request.js
index dd1903859b..dcb2c50f93 100644
--- a/lib/configuration/hooks/jsonapi/helpers/request.js
+++ b/lib/configuration/hooks/jsonapi/helpers/request.js
@@ -41,7 +41,9 @@ module.exports = {
       default:
         throw {
           status: 403,
-          body: 'Invalid HTTP method'
+          body: {
+            message: 'Invalid HTTP method'
+          }
         };
     }
   },
@@ -69,22 +71,30 @@ module.exports = {
     if (!body.hasOwnProperty('data')) {
       throw {
         status: 403,
-        body: 'Missing `data` member'
+        body: {
+          message: 'Missing `data` member'
+        }
       };
     } else if (!utils.isRessourceObject(body.data) && ctx.method !== 'POST') {
       throw {
         status: 403,
-        body: 'Invalid ressource object'
+        body: {
+          message: 'Invalid ressource object'
+        }
       };
     } else if (!body.data.hasOwnProperty('type') && ctx.method === 'POST') {
       throw {
         status: 403,
-        body: 'Invalid ressource object'
+        body: {
+          message: 'Invalid ressource object'
+        }
       };
     } else if (!strapi.models.hasOwnProperty(body.data.type)) {
       throw {
         status: 403,
-        body: 'Unknow `type` ' + body.data.type
+        body: {
+          message: 'Unknow `type` ' + body.data.type
+        }
       };
     }
 
@@ -98,7 +108,9 @@ module.exports = {
     if (!_.isEmpty(missingAttributes)) {
       throw {
         status: 403,
-        body: 'Missing required attributes (' + missingAttributes.toString() + ')'
+        body: {
+          message: 'Missing required attributes (' + missingAttributes.toString() + ')'
+        }
       };
     }
 
@@ -112,7 +124,9 @@ module.exports = {
     if (!_.isEmpty(missingRelationships)) {
       throw {
         status: 403,
-        body: 'Missing required relationships (' + missingRelationships.toString() + ')'
+        body: {
+          message: 'Missing required relationships (' + missingRelationships.toString() + ')'
+        }
       };
     }
 
@@ -120,15 +134,22 @@ module.exports = {
     if (_.size(requiredRelationships)) {
       const errors = _.remove(_.flattenDeep(_.map(body.data.relationships, function (relation, key) {
         if (!relation.hasOwnProperty('data')) {
-          return 'Missing `data` member for relationships ' + relation;
+          return {
+            message: 'Missing `data` member for relationships ' + relation
+          };
         } else if (_.isArray(relation.data)) {
-          return _.map(relation.data, function (ressource) {
+          return _.map(relation.data, function (ressource, position) {
             if (!utils.isRessourceObject(ressource)) {
-              return 'Invalid ressource object in relationships ' + key;
+              return {
+                position: position,
+                message: 'Invalid ressource object in relationships ' + key
+              };
             }
           });
         } else if (!utils.isRessourceObject(relation.data)) {
-          return 'Invalid ressource object for relationships ' + key;
+          return {
+            message: 'Invalid ressource object for relationships ' + key
+          };
         }
       })), function (n) {
         return !_.isUndefined(n);
@@ -137,7 +158,7 @@ module.exports = {
       if (!_.isEmpty(errors)) {
         throw {
           status: 403,
-          body: errors.toString()
+          body: errors
         };
       }
     }
diff --git a/lib/configuration/hooks/jsonapi/helpers/response.js b/lib/configuration/hooks/jsonapi/helpers/response.js
index 5428b4a887..630b6fa5f5 100644
--- a/lib/configuration/hooks/jsonapi/helpers/response.js
+++ b/lib/configuration/hooks/jsonapi/helpers/response.js
@@ -31,18 +31,20 @@ module.exports = {
       ctx.response.status = 404;
       ctx.response.body = '';
 
-      return false;
+      return;
     } else if (ctx.method === 'DELETE') {
       // Request successful and responds with only top-level meta data or nothing.
       ctx.response.body = '';
 
-      return false;
+      return;
     }
 
     // Fetch and format value
     const value = this.fetchValue(ctx, object);
 
-    ctx.response.body = this.serialize(ctx, type, object, value);
+    if (!_.isEmpty(value)) {
+      ctx.response.body = this.serialize(ctx, type, object, value);
+    }
   },
 
   /**
@@ -132,6 +134,11 @@ module.exports = {
     if (strapi.models.hasOwnProperty(type)) {
       _.forEach(strapi.models[type].associations, function (relation) {
         const PK = utils.getPK(relation.model) || utils.getPK(relation.collection);
+        const availableRoutes = {
+          relSlSelf: utils.isRoute('GET /' + type + '/:' + PK + '/relationships/:relation'),
+          relSlRelated: utils.isRoute('GET /' + type + '/:' + PK),
+          incSelf: relation.model ? utils.isRoute('GET /' + relation.model + '/:' + PK) : utils.isRoute('GET /' + relation.collection + '/:' + PK)
+        };
 
         switch (relation.nature) {
           case 'oneToOne':
@@ -139,24 +146,30 @@ module.exports = {
             // Object
             toSerialize[relation.alias] = {
               ref: PK,
-              attributes: _.keys(strapi.models[type].attributes),
+              attributes: _.keys(_.omit(strapi.models[type].attributes, _.isFunction)),
               relationshipLinks: {
                 self: function (record) {
-                  if (record.hasOwnProperty(PK)) {
+                  if (record.hasOwnProperty(PK) && availableRoutes.relSlSelf) {
                     return ctx.request.origin + '/' + type + '/' + record[PK] + '/relationships/' + relation.alias;
                   }
+
+                  return undefined;
                 },
                 related: function (record) {
-                  if (record.hasOwnProperty(PK)) {
+                  if (record.hasOwnProperty(PK) && availableRoutes.relSlRelated) {
                     return ctx.request.origin + '/' + type + '/' + record[PK];
                   }
+
+                  return undefined;
                 }
               },
               includedLinks: {
                 self: function (data, record) {
-                  if (!_.isUndefined(record) && record.hasOwnProperty(PK)) {
+                  if (!_.isUndefined(record) && record.hasOwnProperty(PK) && availableRoutes.incSelf) {
                     return ctx.request.origin + '/' + relation.model + '/' + record[PK];
                   }
+
+                  return undefined;
                 }
               }
             };
@@ -167,24 +180,30 @@ module.exports = {
             toSerialize[relation.alias] = {
               ref: PK,
               typeForAttribute: relation.collection,
-              attributes: _.keys(strapi.models[type].attributes),
+              attributes: _.keys(_.omit(strapi.models[type].attributes, _.isFunction)),
               relationshipLinks: {
                 self: function (record) {
-                  if (record.hasOwnProperty(PK)) {
+                  if (record.hasOwnProperty(PK) && availableRoutes.relSlSelf) {
                     return ctx.request.origin + '/' + type + '/' + record[PK] + '/relationships/' + relation.alias;
                   }
+
+                  return undefined;
                 },
                 related: function (record) {
-                  if (record.hasOwnProperty(PK)) {
+                  if (record.hasOwnProperty(PK) && availableRoutes.relSlRelated) {
                     return ctx.request.origin + '/' + type + '/' + record[PK];
                   }
+
+                  return undefined;
                 }
               },
               includedLinks: {
                 self: function (data, record) {
-                  if (record.hasOwnProperty(PK)) {
+                  if (record.hasOwnProperty(PK) && availableRoutes.incSelf) {
                     return ctx.request.origin + '/' + relation.collection + '/' + record[PK];
                   }
+
+                  return undefined;
                 }
               }
             };
diff --git a/lib/configuration/hooks/jsonapi/index.js b/lib/configuration/hooks/jsonapi/index.js
index ef48b7a5df..a9354fc7da 100644
--- a/lib/configuration/hooks/jsonapi/index.js
+++ b/lib/configuration/hooks/jsonapi/index.js
@@ -31,6 +31,9 @@ module.exports = function (strapi) {
 
         // Exclude administration routes
         if (this.request.url.indexOf('admin') === -1) {
+          // Set the required header
+          this.response.type = 'application/vnd.api+json';
+
           // Verify Content-Type header
           if (this.request.type !== 'application/vnd.api+json') {
             this.status = 406;
@@ -56,7 +59,7 @@ module.exports = function (strapi) {
           } else {
             // Intercept error requests
             this.body = {
-              error: this.body
+              errors: this.body
             };
           }
         }
diff --git a/lib/configuration/hooks/jsonapi/utils/utils.js b/lib/configuration/hooks/jsonapi/utils/utils.js
index 40ac201b3d..df5a6267ce 100644
--- a/lib/configuration/hooks/jsonapi/utils/utils.js
+++ b/lib/configuration/hooks/jsonapi/utils/utils.js
@@ -21,6 +21,14 @@ module.exports = {
     return _.isObject(object) && object.hasOwnProperty('id') && object.hasOwnProperty('type');
   },
 
+  /**
+   * Verify if the route exists
+   */
+
+  isRoute: function (link) {
+    return strapi.config.routes.hasOwnProperty(link);
+  },
+
   /**
    * Find data object
    */