diff --git a/lib/server-app.js b/lib/server-app.js
index 84148aa2..ac8e09ea 100644
--- a/lib/server-app.js
+++ b/lib/server-app.js
@@ -22,7 +22,7 @@ module.exports = function loopbackExpress() {
  * app.middlewareFromConfig(compression, {
  *   enabled: true,
  *   phase: 'initial',
- *   config: {
+ *   params: {
  *     threshold: 128
  *   }
  * });
@@ -30,9 +30,18 @@ module.exports = function loopbackExpress() {
  *
  * @param {function} factory The factory function creating a middleware handler.
  *   Typically a result of `require()` call, e.g. `require('compression')`.
- * @param {Array|*} config The configuration. Either an array of arguments
- *   to pass to the factory function, or the value of the first argument
- *   when the factory expects a single argument only.
+ * @options {Object} config The configuration.
+ * @property {String} phase The phase to register the middelware in.
+ * @property {Boolean} [enabled] Whether the middleware is enabled.
+ *   Default: `true`.
+ * @property {Array|*} [params] The arguments to pass to the factory
+ *   function. Either an array of arguments,
+ *   or the value of the first argument when the factory expects
+ *   a single argument only.
+ *
+ * @returns {object} this (fluent API)
+ *
+ * @header app.middlewareFromConfig(factory, config)
  */
 proto.middlewareFromConfig = function(factory, config) {
   assert(typeof factory === 'function', '"factory" must be a function');
@@ -43,15 +52,17 @@ proto.middlewareFromConfig = function(factory, config) {
   if (config.enabled === false)
     return;
 
-  var args = config.config;
-  if (args === undefined) {
-    args = [];
-  } else if (!Array.isArray(args)) {
-    args = [args];
+  var params = config.params;
+  if (params === undefined) {
+    params = [];
+  } else if (!Array.isArray(params)) {
+    params = [params];
   }
 
-  var handler = factory.apply(null, args);
+  var handler = factory.apply(null, params);
   this.middleware(config.phase, handler);
+
+  return this;
 };
 
 /**
@@ -81,6 +92,10 @@ proto.middlewareFromConfig = function(factory, config) {
  *
  * @param {string|Array.<string>} nameOrArray A phase name or a list of phase
  *   names to add.
+ *
+ * @returns {object} this (fluent API)
+ *
+ * @header app.defineMiddlewarePhases(nameOrArray)
  */
 proto.defineMiddlewarePhases = function(nameOrArray) {
   this.lazyrouter();
@@ -90,6 +105,8 @@ proto.defineMiddlewarePhases = function(nameOrArray) {
   } else {
     this._requestHandlingPhases.addBefore('routes', nameOrArray);
   }
+
+  return this;
 };
 
 /**
@@ -99,6 +116,8 @@ proto.defineMiddlewarePhases = function(nameOrArray) {
  *   `function(req, res, next)` or
  *   `function(err, req, res, next)`
  * @returns {object} this (fluent API)
+ *
+ * @header app.middleware(name, handler)
  */
 proto.middleware = function(name, handler) {
   this.lazyrouter();
diff --git a/test/app.test.js b/test/app.test.js
index 951bce38..a5e02add 100644
--- a/test/app.test.js
+++ b/test/app.test.js
@@ -134,28 +134,28 @@ describe('app', function() {
       app.middlewareFromConfig(handlerFactory, {
         enabled: true,
         phase: 'session',
-        config: expectedConfig
+        params: expectedConfig
       });
 
       // Config as a value (single arg)
       app.middlewareFromConfig(handlerFactory, {
         enabled: true,
         phase: 'session:before',
-        config: 'before'
+        params: 'before'
       });
 
       // Config as a list of args
       app.middlewareFromConfig(handlerFactory, {
         enabled: true,
         phase: 'session:after',
-        config: ['after', 2]
+        params: ['after', 2]
       });
 
       // Disabled by configuration
       app.middlewareFromConfig(handlerFactory, {
         enabled: false,
         phase: 'initial',
-        config: null
+        params: null
       });
 
       executeMiddlewareHandlers(app, function(err) {