diff --git a/jsf/jsf-tests.ts b/jsf/jsf-tests.ts
new file mode 100644
index 000000000..c944bc72d
--- /dev/null
+++ b/jsf/jsf-tests.ts
@@ -0,0 +1,3 @@
+/// <reference path="jsf.d.ts" />
+
+import jsf = require("jsf");
diff --git a/jsf/jsf.d.ts b/jsf/jsf.d.ts
new file mode 100644
index 000000000..14f7b407d
--- /dev/null
+++ b/jsf/jsf.d.ts
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+// Type definitions for for the JSF 2.0 Ajax request API.
+// Project: https://docs.oracle.com/cd/E17802_01/j2ee/javaee/javaserverfaces/2.0/docs/js-api/symbols/jsf.ajax.html
+// Definitions by: Lars Michaelis <https://github.com/larmic> and Stephan Zerhusen <https://github.com/szerhusenBC>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+declare module "jsf" {
+   module ajax {
+
+      interface RequestData {
+         status: string;
+         description: string;
+      }
+
+      interface RequestOptions {
+         /**
+          * space seperated list of client identifiers
+          */
+         execute?: String;
+
+         /**
+          * space seperated list of client identifiers
+          */
+         render?: String;
+
+         /**
+          * function to callback for event
+          * @param callback the callback function
+          */
+         onevent?(callback:(data:RequestData) => void): void;
+
+         /**
+          * function to callback for error
+          * @param callback the callback function
+          */
+         onerror?(callback:(data:RequestData) => void): void;
+
+         /**
+          * object containing parameters to include in the request
+          */
+         params?: any;
+      }
+
+      /**
+       * Register a callback for event handling.
+       * @param callback a reference to a function to call on an event
+       */
+      function addOnEvent(callback:(data:RequestData) => void):void;
+
+      /**
+       * Register a callback for error handling.
+       * @param callback a reference to a function to call on an error
+       */
+      function addOnError(callback:(data:RequestData) => void):void;
+
+      /**
+       * Send an asynchronous Ajax request to the server.
+       * @param source The DOM element that triggered this Ajax request, or an id string of the element to use as the triggering element.
+       * @param event The DOM event that triggered this Ajax request. The event argument is optional.
+       * @param options The set of available options that can be sent as request parameters to control client and/or server side request processing.
+       */
+      function request(source:any, event?:String, options?:RequestOptions):void;
+
+      /**
+       * Receive an Ajax response from the server.
+       * @param request The XMLHttpRequest instance that contains the status code and response message from the server.
+       * @param context An object containing the request context, including the following properties: the source element, per call onerror callback function, and per call onevent callback function.
+       * @throws EmptyResponse error if request contains no data
+       */
+      function response(request:any, context:any):void;
+
+   }
+}