diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index f39e1f53d6..f26669b9cb 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -21,6 +21,7 @@ All definitions files include a header with the author and editors, so at some p
 * [asciify](https://github.com/olizilla/asciify) (by [Alan](http://alan.norbauer.com))
 * [assert](https://github.com/Jxck/assert) (by [vvakame](https://github.com/vvakame))
 * [async](https://github.com/caolan/async) (by [Boris Yankov](https://github.com/borisyankov))
+* [atmosphere](https://github.com/Atmosphere/atmosphere-javascript) (by [Kai Toedter](https://github.com/toedter))
 * [Atom](https://atom.io/) (by [vvakame](https://github.com/vvakame))
 * [aws-sdk-js](https://github.com/aws/aws-sdk-js) (by [midknight41](https://github.com/midknight41))
 * [Backbone.js](http://backbonejs.org/) (by [Boris Yankov](https://github.com/borisyankov))
diff --git a/atmosphere/atmosphere-tests.ts b/atmosphere/atmosphere-tests.ts
new file mode 100644
index 0000000000..44c2880a35
--- /dev/null
+++ b/atmosphere/atmosphere-tests.ts
@@ -0,0 +1,46 @@
+/// <reference path="atmosphere.d.ts" />
+
+var socket = atmosphere;
+
+var request1:Atmosphere.Request = new atmosphere.AtmosphereRequest();
+
+request1.url = document.location.toString() + 'chat';
+request1.contentType = "application/json";
+request1.transport = 'websocket';
+request1.fallbackTransport = 'long-polling';
+
+var request2:Atmosphere.Request = {
+    url: 'http://localhost:8080/chat',
+    contentType: "application/json",
+    logLevel: 'debug',
+    transport: 'websocket',
+    fallbackTransport: 'long-polling'
+};
+
+request1.onError = function (response?:Atmosphere.Response) {};
+request1.onClose = function (response?:Atmosphere.Response) {};
+request1.onOpen = function (response?:Atmosphere.Response) {};
+request1.onMessage = function (response:Atmosphere.Response) {};
+request1.onReopen = function (request?:Atmosphere.Request, response?:Atmosphere.Response) {};
+request1.onReconnect = function (request?:Atmosphere.Request, response?:Atmosphere.Response) {};
+request1.onMessagePublished = function (response?:Atmosphere.Response) {};
+request1.onTransportFailure = function (reason?:string, response?:Atmosphere.Response) {};
+request1.onLocalMessage = function (request?:Atmosphere.Request) {};
+request1.onFailureToReconnect = function (request?:Atmosphere.Request, response?:Atmosphere.Response) {};
+request1.onClientTimeout = function (request?:Atmosphere.Request) {};
+
+request1.subscribe = function (options:Atmosphere.Request) {};
+request1.execute = function () {};
+request1.close = function () {};
+request1.disconnect = function () {};
+request1.getUrl = function ():string { return "http://www.toedter.com" };
+request1.push = function (message:string, dispatchUrl?:string) {};
+request1.getUUID = function () {};
+request1.pushLocal = function (message:string) {};
+
+var subSocket:Atmosphere.Request = socket.subscribe(request1);
+var subSocket2:Atmosphere.Request = socket.subscribe('http://chat.com', function() {}, request2);
+subSocket2.close();
+
+subSocket.push("test");
+socket.unsubscribe();
\ No newline at end of file
diff --git a/atmosphere/atmosphere.d.ts b/atmosphere/atmosphere.d.ts
new file mode 100644
index 0000000000..59d743a4b9
--- /dev/null
+++ b/atmosphere/atmosphere.d.ts
@@ -0,0 +1,106 @@
+// Type definitions for Atmosphere v2.1.5
+// Project: https://github.com/Atmosphere/atmosphere-javascript
+// Definitions by: Kai Toedter <https://github.com/toedter/>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+declare module Atmosphere {
+    interface Atmosphere {
+        /**
+         * The atmosphere API is a little bit special here: the first parameter can either be
+         * a URL string or a Request object. If it is a URL string, then the additional parameters are expected.
+         */
+        subscribe?: (requestOrUrl:any, callback?:Function, request?:Request) => Request;
+        unsubscribe?: () => void;
+
+        AtmosphereRequest?: AtmosphereRequest;
+    }
+
+    // needed to fit JavaScript "new atmosphere.AtmosphereRequest()"
+    // and compile with --noImplicitAny
+    interface AtmosphereRequest {
+        new(): Request;
+    }
+
+    interface Request {
+        timeout?: number;
+        method?: string;
+        headers?: any;
+        contentType?: string;
+        callback?: Function;
+        url?: string;
+        data?: string;
+        suspend?: boolean;
+        maxRequest?: number;
+        reconnect?: boolean;
+        maxStreamingLength?: number;
+        lastIndex?: number;
+        logLevel?: string;
+        requestCount?: number;
+        fallbackMethod?: string;
+        fallbackTransport?: string;
+        transport?: string;
+        webSocketImpl?: any;
+        webSocketBinaryType?: any;
+        dispatchUrl?: string;
+        webSocketPathDelimiter?: string;
+        enableXDR?: boolean;
+        rewriteURL?: boolean;
+        attachHeadersAsQueryString?: boolean;
+        executeCallbackBeforeReconnect?: boolean;
+        readyState?: number;
+        lastTimestamp?: number;
+        withCredentials?: boolean;
+        trackMessageLength?: boolean;
+        messageDelimiter?: string;
+        connectTimeout?: number;
+        reconnectInterval?: number;
+        dropHeaders?: boolean;
+        uuid?: number;
+        async?: boolean;
+        shared?: boolean;
+        readResponsesHeaders?: boolean;
+        maxReconnectOnClose?: number;
+        enableProtocol?: boolean;
+        pollingInterval?: number;
+
+        onError?: (response?:Response) => void;
+        onClose?:  (response?:Response)  => void;
+        onOpen?:  (response?:Response)  => void;
+        onMessage?:  (response:Response)  => void;
+        onReopen?:  (request?:Request, response?:Response) => void;
+        onReconnect?:  (request?:Request, response?:Response)  => void;
+        onMessagePublished?:  (response?:Response)  => void;
+        onTransportFailure?:  (reason?:string, response?:Response)  => void;
+        onLocalMessage?:  (request?:Request) => void;
+        onFailureToReconnect?:  (request?:Request, response?:Response) => void;
+        onClientTimeout?: (request?:Request) => void;
+
+        subscribe?: (options:Request) => void;
+        execute?: () => void;
+        close?: () => void;
+        disconnect?: () => void;
+        getUrl?: () => string;
+        push?: (message:string, dispatchUrl?:string) => void;
+        getUUID?: () => void;
+        pushLocal?: (message:string) => void;
+    }
+
+    interface Response {
+        status?: number;
+        reasonPhrase?: string;
+        responseBody?: string;
+        messages?: string[];
+        headers?: string[];
+        state?: string;
+        transport?: string;
+        error?: string;
+        request?: Request;
+        partialMessage?: string;
+        errorHandled?: boolean;
+        closedByClientTimeout?: boolean;
+    }
+}
+
+declare var atmosphere:Atmosphere.Atmosphere;
+
+