diff --git a/axios/axios-tests.ts b/axios/axios-tests.ts
index 3f692307a..184292c92 100644
--- a/axios/axios-tests.ts
+++ b/axios/axios-tests.ts
@@ -8,21 +8,64 @@ interface Repository {
   name: string;
 }
 
+interface Issue {
+  id: number;
+  title: string;
+}
+
+axios.interceptors.request.use<any>(config => {
+    console.log("Method:" + config.method + " Url:" +config.url);
+    return config;
+});
+
+axios.interceptors.response.use<any>(config => {
+    console.log("Status:" + config.status);
+    return config;
+});
+
 axios.get<Repository>("https://api.github.com/repos/mzabriskie/axios")
      .then(r => console.log(r.config.method));
 
-axios<Repository>({
+var getRepoDetails = axios<Repository>({
     url: "https://api.github.com/repos/mzabriskie/axios",
     method: HttpMethod[HttpMethod.GET],
     headers: {},
-}).then(r => console.log("ID:" + r.data.id + " Name: " + r.data.name));
+}).then(r => {
+    console.log("ID:" + r.data.id + " Name: " + r.data.name);
+    return r;
+});
 
 axios.post("http://example.com/", {}, {
     transformRequest: (data: any) => data
 });
 
-axios.post("http://example.com/", {}, {
+axios.post("http://example.com/", {
+       headers: {'X-Custom-Header': 'foobar'}
+}, {
     transformRequest: [
         (data: any) => data
     ]
 });
+
+var getRepoIssue = axios.get<Issue>("https://api.github.com/repos/mzabriskie/axios/issues/1");
+
+var axiosInstance = axios.create({
+    baseURL: "https://api.github.com/repos/mzabriskie/axios/",
+    timeout: 1000
+});
+
+axiosInstance.request({url: "issues/1"});
+
+axios.all<Repository, Repository>([getRepoDetails, getRepoDetails]).then(([repo1, repo2]) => {
+    var sumIds = repo1.data.id + repo2.data.id;
+    console.log("Sum ID:" + sumIds);
+    return sumIds;
+});
+
+var repoSum = (repo1: Axios.AxiosXHR<Repository>, repo2: Axios.AxiosXHR<Repository>) => {
+    var sumIds = repo1.data.id + repo2.data.id;
+    console.log("Sum ID:" + sumIds);
+    return sumIds;
+};
+
+axios.all<Repository, Repository>([getRepoDetails, getRepoDetails]).then(axios.spread(repoSum));
diff --git a/axios/axios.d.ts b/axios/axios.d.ts
index fd19caf94..7348ec651 100644
--- a/axios/axios.d.ts
+++ b/axios/axios.d.ts
@@ -1,9 +1,8 @@
-// Type definitions for axios 0.5.2
+// Type definitions for axios 0.8.1
 // Project: https://github.com/mzabriskie/axios
 // Definitions by: Marcel Buesing <https://github.com/marcelbuesing>
 // Definitions: https://github.com/borisyankov/DefinitelyTyped
 
-
 declare module Axios {
 
     interface IThenable<R> {
@@ -18,21 +17,24 @@ declare module Axios {
     }
 
     /**
+     * HTTP Basic auth details
+     */
+    interface AxiosHttpBasicAuth {
+        username: string;
+        password: string;
+    }
+
+    /**
+     * Common axios XHR config interface
      * <T> - request body data type
      */
     interface AxiosXHRConfigBase<T> {
-
         /**
-         * Change the request data before it is sent to the server.
-         * This is only applicable for request methods 'PUT', 'POST', and 'PATCH'
-         * The last function in the array must return a string or an ArrayBuffer
+         * will be prepended to `url` unless `url` is absolute.
+         * It can be convenient to set `baseURL` for an instance
+         * of axios to pass relative URLs to methods of that instance.
          */
-        transformRequest?: (<U>(data: T) => U) | [<U>(data: T) => U];
-
-        /**
-         * change the response data to be made before it is passed to then/catch
-         */
-        transformResponse?: <U>(data: T) => U;
+        baseURL?: string;
 
         /**
          * custom headers to be sent
@@ -44,12 +46,32 @@ declare module Axios {
          */
         params?: Object;
 
+        /**
+         * optional function in charge of serializing `params`
+         * (e.g. https://www.npmjs.com/package/qs, http://api.jquery.com/jquery.param/)
+         */
+        paramsSerializer?: (params: Object) => string;
+
+        /**
+         * specifies the number of milliseconds before the request times out.
+         * If the request takes longer than `timeout`, the request will be aborted.
+         */
+        timeout?: number;
+
         /**
          * indicates whether or not cross-site Access-Control requests
          * should be made using credentials
          */
         withCredentials?: boolean;
 
+        /**
+         * indicates that HTTP Basic auth should be used, and supplies
+         * credentials. This will set an `Authorization` header,
+         * overwriting any existing `Authorization` custom headers you have
+         * set using `headers`.
+         */
+        auth?: AxiosHttpBasicAuth;
+
         /**
          * indicates the type of data that the server will respond with
          * options are 'arraybuffer', 'blob', 'document', 'json', 'text'
@@ -66,6 +88,17 @@ declare module Axios {
          */
         xsrfHeaderName?: string;
 
+        /**
+         * Change the request data before it is sent to the server.
+         * This is only applicable for request methods 'PUT', 'POST', and 'PATCH'
+         * The last function in the array must return a string or an ArrayBuffer
+         */
+        transformRequest?: (<U>(data: T) => U) | [<U>(data: T) => U];
+
+        /**
+         * change the response data to be made before it is passed to then/catch
+         */
+        transformResponse?: <U>(data: T) => U;
     }
 
     /**
@@ -92,7 +125,7 @@ declare module Axios {
     }
 
     /**
-     * <T> - expected response type, 
+     * <T> - expected response type,
      * <U> - request body data type
      */
     interface AxiosXHR<T> {
@@ -122,16 +155,77 @@ declare module Axios {
         config: AxiosXHRConfig<T>;
     }
 
+    interface Interceptor {
+        /**
+         * intercept request before it is sent
+         */
+        request: RequestInterceptor;
+
+        /**
+         * intercept response of request when it is received.
+         */
+        response: ResponseInterceptor
+    }
+
+    interface RequestInterceptor {
+        /**
+         * <U> - request body data type
+         */
+        use<U>(fn: (config: AxiosXHRConfig<U>) => AxiosXHRConfig<U>): void;
+    }
+
+    interface ResponseInterceptor {
+        /**
+         * <T> - expected response type
+         */
+        use<T>(fn: (config: AxiosXHR<T>) => AxiosXHR<T>): void;
+    }
+
     /**
-     * <T> - expected response type, 
+     * <T> - expected response type,
      * <U> - request body data type
      */
-    interface AxiosStatic {
+    interface AxiosInstance {
 
+        /**
+         * Send request as configured
+         */
         <T>(config: AxiosXHRConfig<T>): IPromise<AxiosXHR<T>>;
 
+        /**
+         * Send request as configured
+         */
         new <T>(config: AxiosXHRConfig<T>): IPromise<AxiosXHR<T>>;
 
+        /**
+         * Send request as configured
+         */
+        request<T>(config: AxiosXHRConfig<T>): IPromise<AxiosXHR<T>>;
+
+        /**
+         * intercept requests or responses before they are handled by then or catch
+         */
+        interceptors: Interceptor;
+
+        /**
+         * equivalent to `Promise.all`
+         */
+        all<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(values: [T1 | IPromise<AxiosXHR<T1>>, T2 | IPromise<AxiosXHR<T2>>, T3 | IPromise<AxiosXHR<T3>>, T4 | IPromise<AxiosXHR<T4>>, T5 | IPromise<AxiosXHR<T5>>, T6 | IPromise<AxiosXHR<T6>>, T7 | IPromise<AxiosXHR<T7>>, T8 | IPromise<AxiosXHR<T8>>, T9 |  IPromise<AxiosXHR<T9>>, T10 |  IPromise<AxiosXHR<T10>>]): IPromise<[AxiosXHR<T1>, AxiosXHR<T2>, AxiosXHR<T3>, AxiosXHR<T4>, AxiosXHR<T5>, AxiosXHR<T6>, AxiosXHR<T7>, AxiosXHR<T8>, AxiosXHR<T9>, AxiosXHR<T10>]>;
+        all<T1, T2, T3, T4, T5, T6, T7, T8, T9>(values: [T1 | IPromise<AxiosXHR<T1>>, T2 | IPromise<AxiosXHR<T2>>, T3 | IPromise<AxiosXHR<T3>>, T4 | IPromise<AxiosXHR<T4>>, T5 | IPromise<AxiosXHR<T5>>, T6 | IPromise<AxiosXHR<T6>>, T7 | IPromise<AxiosXHR<T7>>, T8 | IPromise<AxiosXHR<T8>>, T9 |  IPromise<AxiosXHR<T9>>]): IPromise<[AxiosXHR<T1>, AxiosXHR<T2>, AxiosXHR<T3>, AxiosXHR<T4>, AxiosXHR<T5>, AxiosXHR<T6>, AxiosXHR<T7>, AxiosXHR<T8>, AxiosXHR<T9>]>;
+        all<T1, T2, T3, T4, T5, T6, T7, T8>(values: [T1 | IPromise<AxiosXHR<T1>>, T2 | IPromise<AxiosXHR<T2>>, T3 | IPromise<AxiosXHR<T3>>, T4 | IPromise<AxiosXHR<T4>>, T5 | IPromise<AxiosXHR<T5>>, T6 | IPromise<AxiosXHR<T6>>, T7 | IPromise<AxiosXHR<T7>>, T8 | IPromise<AxiosXHR<T8>>]): IPromise<[AxiosXHR<T1>, AxiosXHR<T2>, AxiosXHR<T3>, AxiosXHR<T4>, AxiosXHR<T5>, AxiosXHR<T6>, AxiosXHR<T7>, AxiosXHR<T8>]>;
+        all<T1, T2, T3, T4, T5, T6, T7>(values: [T1 | IPromise<AxiosXHR<T1>>, T2 | IPromise<AxiosXHR<T2>>, T3 | IPromise<AxiosXHR<T3>>, T4 | IPromise<AxiosXHR<T4>>, T5 | IPromise<AxiosXHR<T5>>, T6 | IPromise<AxiosXHR<T6>>, T7 | IPromise<AxiosXHR<T7>>]): IPromise<[AxiosXHR<T1>, AxiosXHR<T2>, AxiosXHR<T3>, AxiosXHR<T4>, AxiosXHR<T5>, AxiosXHR<T6>, AxiosXHR<T7>]>;
+        all<T1, T2, T3, T4, T5, T6>(values: [T1 | IPromise<AxiosXHR<T1>>, T2 | IPromise<AxiosXHR<T2>>, T3 | IPromise<AxiosXHR<T3>>, T4 | IPromise<AxiosXHR<T4>>, T5 | IPromise<AxiosXHR<T5>>, T6 | IPromise<AxiosXHR<T6>>]): IPromise<[AxiosXHR<T1>, AxiosXHR<T2>, AxiosXHR<T3>, AxiosXHR<T4>, AxiosXHR<T5>, AxiosXHR<T6>]>;
+        all<T1, T2, T3, T4, T5>(values: [T1 | IPromise<AxiosXHR<T1>>, T2 | IPromise<AxiosXHR<T2>>, T3 | IPromise<AxiosXHR<T3>>, T4 | IPromise<AxiosXHR<T4>>, T5 | IPromise<AxiosXHR<T5>>]): IPromise<[AxiosXHR<T1>, AxiosXHR<T2>, AxiosXHR<T3>, AxiosXHR<T4>, AxiosXHR<T5>]>;
+        all<T1, T2, T3, T4>(values: [T1 | IPromise<AxiosXHR<T1>>, T2 | IPromise<AxiosXHR<T2>>, T3 | IPromise<AxiosXHR<T3>>, T4 | IPromise<AxiosXHR<T4>>]): IPromise<[AxiosXHR<T1>, AxiosXHR<T2>, AxiosXHR<T3>, AxiosXHR<T4>]>;
+        all<T1, T2, T3>(values: [T1 | IPromise<AxiosXHR<T1>>, T2 | IPromise<AxiosXHR<T2>>, T3 | IPromise<AxiosXHR<T3>>]): IPromise<[AxiosXHR<T1>, AxiosXHR<T2>, AxiosXHR<T3>]>;
+        all<T1, T2>(values: [T1 | IPromise<AxiosXHR<T1>>, T2 | IPromise<AxiosXHR<T2>>]): IPromise<[AxiosXHR<T1>, AxiosXHR<T2>]>;
+
+        /**
+         * spread array parameter to `fn`.
+         * note: alternative to `spread`, destructuring assignment.
+         */
+        spread<T1, T2, U>(fn: (t1: T1, t2: T2) => U): (arr: ([T1, T2])) =>  U;
+
         /**
          * convenience alias, method = GET
          */
@@ -163,6 +257,16 @@ declare module Axios {
          */
         patch<T>(url: string, data?: any, config?: AxiosXHRConfigBase<T>): IPromise<AxiosXHR<T>>;
     }
+
+    /**
+     * <T> - expected response type,
+     */
+    interface AxiosStatic extends AxiosInstance {
+        /**
+         * create a new instance of axios with a custom config
+         */
+        create<T>(config: AxiosXHRConfigBase<T>): AxiosInstance;
+    }
 }
 
 declare var axios: Axios.AxiosStatic;