diff --git a/src/directives/autocomplete.coffee b/src/directives/autocomplete.coffee
index c3c6053..5293076 100644
--- a/src/directives/autocomplete.coffee
+++ b/src/directives/autocomplete.coffee
@@ -11,7 +11,16 @@ A directive for providing suggestions while typing into the field
 @param {String} ng-model Assignable angular expression to data-bind to (required)
 @param {String} mac-placeholder Placeholder text
 @param {String} mac-autocomplete-url Url to fetch autocomplete dropdown list data. URL may include GET params e.g. "/users?nocache=1"
-@param {Expression} mac-autocomplete-source Local data source
+@param {Expression} mac-autocomplete-source Data to use.
+Source support multiple types:
+- Array: An array can be used for local data and there are two supported formats:
+  - An array of strings: ["Item1", "Item2"]
+  - An array of objects with mac-autocomplete-label key: [{name:"Item1"}, {name:"Item2"}]
+- String: Using a string as the source is the same as passing the variable into mac-autocomplete-url
+- Function: A callback when querying for data. The callback receive two arguments:
+  - {String} Value currently in the text input
+  - {Function} A response callback which expects a single argument, data to user. The data will be
+  populated on the menu and the menu will adjust accordingly
 @param {Boolean} mac-autocomplete-disabled Boolean value if autocomplete should be disabled
 @param {Function} mac-autocomplete-on-select Function called when user select on an item
        - `selected` - {Object} The item selected
@@ -166,6 +175,32 @@ angular.module("Mac").directive "macAutocomplete", [
             label = value = item[labelKey] or item
             $menuScope.items.push {label, value}
 
+          positionMenu()
+
+      ###
+      @function
+      @name getData
+      @description
+      GET request to fetch data from server, update menu items and position
+      menu
+      @param {String} url URL to fetch data from
+      ###
+      getData = (url, query) ->
+        options =
+          method: "GET"
+          url:    url
+          params: {}
+        options.params[queryKey] = query
+
+        $http(options)
+          .success (data, status, headers, config) ->
+            dataList  = onSuccess $scope, {data, status, headers}
+            dataList ?= data.data
+
+            updateItem dataList
+          .error (data, status, headers, config) ->
+            onError $scope, {data, status, headers}
+
       ###
       @function
       @name queryData
@@ -177,24 +212,18 @@ angular.module("Mac").directive "macAutocomplete", [
         url = autocompleteUrl $scope
 
         if url
-          options =
-            method: "GET"
-            url:    url
-            params: {}
-          options.params[queryKey] = query
-
-          $http(options)
-            .success (data, status, headers, config) ->
-              dataList  = onSuccess $scope, {data, status, headers}
-              dataList ?= data.data
-
-              updateItem dataList
-              positionMenu()
-            .error (data, status, headers, config) ->
-              onError $scope, {data, status, headers}
-        else if attrs.macAutocompleteSource?
-          updateItem $filter("filter")(source($scope), query)
-          positionMenu()
+          getData url, query
+        else
+          sourceData = source $scope
+
+          if angular.isArray(sourceData)
+            updateItem $filter("filter")(sourceData, query)
+
+          else if angular.isString(sourceData)
+            getData sourceData, query
+
+          else if angular.isFunction(sourceData)
+            sourceData query, updateItem
 
       $menuScope.select = (index) ->
         selected = currentAutocomplete[index]
diff --git a/test/unit/autocomplete.spec.coffee b/test/unit/autocomplete.spec.coffee
index 2fea395..937a1b5 100644
--- a/test/unit/autocomplete.spec.coffee
+++ b/test/unit/autocomplete.spec.coffee
@@ -46,6 +46,11 @@ describe "Mac autocomplete", ->
       expect($(".mac-menu").length).toBe 0
 
   describe "source", ->
+    $httpBackend = null
+
+    beforeEach inject (_$httpBackend_) ->
+      $httpBackend = _$httpBackend_
+
     it "should use local array", ->
       $rootScope.source = data
       $rootScope.test   = ""
@@ -69,6 +74,30 @@ describe "Mac autocomplete", ->
       changeInputValue element, "f"
       expect($(".mac-menu-item").text() == "foo").toBe true
 
+    it "should use a url string and work exactly like mac-autocomplete-url", ->
+      $httpBackend.when("GET", "/api/autocomplete?q=f").respond({data})
+
+      $rootScope.source = "/api/autocomplete"
+
+      element = $compile("<mac-autocomplete ng-model='test' mac-autocomplete-source='source' mac-autocomplete-delay='0'></mac-autocomplete>") $rootScope
+      $rootScope.$digest()
+
+      changeInputValue element, "f"
+      $rootScope.$digest()
+
+      $httpBackend.flush()
+
+    it "should use a callback function", ->
+      $rootScope.source = (query, callback) -> callback ["foo"]
+
+      element = $compile("<mac-autocomplete ng-model='test' mac-autocomplete-source='source' mac-autocomplete-delay='0'></mac-autocomplete>") $rootScope
+      $rootScope.$digest()
+
+      changeInputValue element, "f"
+      $rootScope.$digest()
+
+      expect($(".mac-menu-item").text() == "foo").toBe true
+
   describe "label", ->
     it "should use default 'name' label", ->
       $rootScope.source = [