diff --git a/jsend/jsend-tests.ts b/jsend/jsend-tests.ts
new file mode 100644
index 0000000000..72598c904b
--- /dev/null
+++ b/jsend/jsend-tests.ts
@@ -0,0 +1,10 @@
+/// <reference path="jsend.d.ts" />
+
+import jsend = require('jsend');
+
+var valid: boolean = jsend.isValid({ status: 'success' });
+
+var success = jsend.success('data');
+var error = jsend.error('some error');
+error = jsend.error({ message: 'nessage', code: 123 });
+
diff --git a/jsend/jsend.d.ts b/jsend/jsend.d.ts
new file mode 100644
index 0000000000..4c87aad340
--- /dev/null
+++ b/jsend/jsend.d.ts
@@ -0,0 +1,46 @@
+// Type definitions for jsend 1.0.2
+// Project: https://github.com/Prestaul/jsend
+// Definitions by: Federico Caselli <https://github.com/CaselIT> 
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+declare module Express {
+  export interface Response {
+    jsend: jsend.jsendExpress;
+  }
+}
+
+declare module jsend {
+  interface JSendObject {
+    status: string;
+    code?: number;
+    data?: any;
+    message?: string;
+  }
+
+  interface jsendCore {
+    success(data: Object): JSendObject;
+    fail(data: Object): JSendObject;
+    error(message: string | { message: string, code?: number, data?: Object }): JSendObject;
+  }
+
+  interface jsendExpress extends jsendCore {
+    (err: string | Object, json?: Object): void
+  }
+
+  interface jsend extends jsendCore {
+    isValid(json: Object): boolean;
+    forward(json: Object, done: (err: any, data: any) => any):void;
+    fromArguments(err: string | Object, json?: Object): JSendObject;
+    middleware(req: any, res: any, next: Function): any;
+  }
+
+  interface jsendExport extends jsend {
+    (config?: { strict: boolean }, host?: Object): jsend
+  }
+  var jsend: jsendExport;
+}
+
+declare module "jsend" {
+  export = jsend.jsend;
+}
+