diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index f39e1f53d6ac9a..394f420bc35222 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -1,4 +1,4 @@
-# Contributors
+# Contributors
 
 This is a non-exhaustive list of definitions and their creators. If you created a definition but are not listed then feel free to send a pull request on this file with your name and url.
 
@@ -22,6 +22,8 @@ All definitions files include a header with the author and editors, so at some p
 * [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))
 * [Atom](https://atom.io/) (by [vvakame](https://github.com/vvakame))
+* [Auth0](https://auth0.com/) (by [Robert McLaws](https://github.com/advancedrei))
+* [Auth0.Widget](https://auth0.com/) (by [Robert McLaws](https://github.com/advancedrei))
 * [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))
 * [Backbone Relational](http://backbonerelational.org/) (by [Eirik Hoem](https://github.com/eirikhm))
diff --git a/auth0.widget/auth0.widget-tests.ts b/auth0.widget/auth0.widget-tests.ts
new file mode 100644
index 00000000000000..012e9b9769b4cb
--- /dev/null
+++ b/auth0.widget/auth0.widget-tests.ts
@@ -0,0 +1,18 @@
+/// <reference path="../auth0/auth0.d.ts" />
+/// <reference path="auth0.widget.d.ts" />
+
+var widget: Auth0WidgetStatic = new Auth0Widget({
+    domain: 'mine.auth0.com',
+    clientID: 'dsa7d77dsa7d7',
+    callbackURL: 'http://my-app.com/callback',
+    callbackOnLocationHash: true
+});
+
+widget.signin({
+    connections: ['facebook', 'google-oauth2', 'twitter', 'Username-Password-Authentication'],
+    icon: 'https://contoso.com/logo-32.png',
+    showIcon: true
+},
+    () => {
+        // The Auth0 Widget is now loaded.
+    });
diff --git a/auth0.widget/auth0.widget.d.ts b/auth0.widget/auth0.widget.d.ts
new file mode 100644
index 00000000000000..6be138dcbbd8bb
--- /dev/null
+++ b/auth0.widget/auth0.widget.d.ts
@@ -0,0 +1,48 @@
+// Type definitions for Auth0Widget.js
+// Project: Auth0.com
+// Definitions by: Robert McLaws <https://github.com/advancedrei>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+/// <reference path="../auth0/auth0.d.ts" />
+
+
+interface Auth0WidgetStatic {
+    new(params: Auth0Constructor): Auth0WidgetStatic;
+
+    getClient(): Auth0Static;
+    getProfile(token: string, callback: Function): Auth0UserProfile;
+    parseHash(hash: string): Auth0DecodedHash;
+    reset(options: Auth0Options, callback?: Function): Auth0WidgetStatic;
+    signin(options: Auth0Options, widgetLoadedCallback?: Function, popupCallback?: Function): Auth0WidgetStatic;
+    signup(options: Auth0Options, callback: (error?: Auth0Error, profile?, id_token?, access_token?, state?) => any): Auth0WidgetStatic;
+ }
+
+interface Auth0Constructor extends Auth0ClientOptions {
+     assetsUrl?: string;
+     cdn?: string;
+     dict?: any;
+ }
+
+interface Auth0Options {
+     access_token?: string;
+     connections?: string[];
+     container?: string;
+     enableReturnUserExperience?: boolean;
+     extraParameters?: any;
+     icon?: string;
+     protocol?: string;
+     request_id?: string;
+     scope?: string;
+     showIcon?: boolean;
+     showForgot?: boolean;
+     showSignup?: boolean;
+     state?: any;
+     userPwdConnectionName?: string;
+     username_style?: string;
+}
+
+declare var Auth0Widget: Auth0WidgetStatic;
+
+declare module "Auth0Widget" {
+    export = Auth0Widget
+}
\ No newline at end of file
diff --git a/auth0/auth0-tests.ts b/auth0/auth0-tests.ts
new file mode 100644
index 00000000000000..9cd903b3069a9a
--- /dev/null
+++ b/auth0/auth0-tests.ts
@@ -0,0 +1,23 @@
+/// <reference path="../auth0/auth0.d.ts" />
+
+var auth0 = new Auth0({
+    domain: 'mine.auth0.com',
+    clientID: 'dsa7d77dsa7d7',
+    callbackURL: 'http://my-app.com/callback',
+    callbackOnLocationHash: true
+});
+
+auth0.login({
+    connection: 'google-oauth2',
+    popup: true,
+    popupOptions: {
+        width: 450,
+        height: 800
+    }
+}, (err, profile, idToken, accessToken, state) => {
+        if (err) {
+            alert("something went wrong: " + err.message);
+            return;
+        }
+        alert('hello ' + profile.name);
+    });
diff --git a/auth0/auth0.d.ts b/auth0/auth0.d.ts
new file mode 100644
index 00000000000000..939928b8e76b88
--- /dev/null
+++ b/auth0/auth0.d.ts
@@ -0,0 +1,107 @@
+// Type definitions for Auth0.js
+// Project: Auth0.com
+// Definitions by: Robert McLaws <https://github.com/advancedrei>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+/** This is the interface for the main Auth0 client. */
+interface Auth0Static {
+    
+    new(options: Auth0ClientOptions): Auth0Static;
+    changePassword(options: any, callback?: Function);
+    decodeJwt(jwt: string): any;
+    login(options: any, callback: (error, profile?, id_token?, access_token?, state?) => any);
+    loginWithPopup(options: Auth0LoginOptions, callback: (error, profile?, id_token?, access_token?, state?) => any);
+    loginWithResourceOwner(options: Auth0LoginOptions, callback: (error?: Auth0Error, profile?, id_token?, access_token?, state?) => any);
+    loginWithUsernamePassword(options: Auth0LoginOptions, callback: (error?: Auth0Error, profile?, id_token?, access_token?, state?) => any);
+    logout(query: string): void;
+    getConnections(callback?: Function)
+    getDelegationToken(targetClientId, id_token: string, options: any, callback: (error?: Auth0Error, delegationResult?: Auth0DelegationToken) => any): void;
+    getProfile(id_token: string, callback?: Function): Auth0UserProfile;
+    getSSOData(withActiveDirectories: any, callback?: Function);
+    parseHash(hash: string): Auth0DecodedHash;
+    signup(options: Auth0SignupOptions, callback: Function);
+    validateUser(options: any, callback: (error?: Auth0Error, valid?) => any);
+}
+
+/** Represents constructor options for the Auth0 client. */
+interface Auth0ClientOptions {
+    clientID: string;
+    callbackURL: string;
+    callbackOnLoactionHash?: boolean;
+    domain: string;
+    forceJSONP?: boolean;
+} 
+
+/** Represents a normalized UserProfile. */
+interface Auth0UserProfile {
+    email: string;
+    family_name: string;
+    gender: string;
+    given_name: string;
+    locale: string;
+    name: string;
+    nickname: string;
+    picture: string;
+    user_id: string;
+    /** Represents one or more Identities that may be associated with the User. */
+    identities: Auth0Identity[];
+}
+
+/** Represents  */
+interface Auth0Identity {
+    access_token: string;
+    connection: string;
+    isSocial: boolean;
+    provider: string;
+    user_id: string;
+}
+
+interface Auth0DecodedHash {
+    access_token: string;
+    id_token: string;
+    profile: Auth0UserProfile;
+    state: any;
+}
+
+interface Auth0PopupOptions {
+    width: number;
+    height: number;
+}
+
+interface Auth0LoginOptions {
+    auto_login?: boolean;
+    connection?: string;
+    email?: string;
+    username?: string;
+    password?: string;
+    popup?: boolean;
+    popupOptions?: Auth0PopupOptions;
+}
+
+interface Auth0SignupOptions extends Auth0LoginOptions {
+    auto_login: boolean;
+}
+
+interface Auth0Error {
+    code: any;
+    details: any;
+    name: string;
+    message: string;
+    status: any;
+}
+
+/** Represents the response from an API Token Delegation request. */
+interface Auth0DelegationToken {
+    /** The length of time in seconds the token is valid for. */
+    expires_in: string;
+    /** The JWT for delegated access.  */
+    id_token: string;
+    /** The type of token being returned. Possible values: "Bearer"  */
+    token_type: string;
+}
+
+declare var Auth0: Auth0Static;
+
+declare module "Auth0" {
+    export = Auth0
+}
\ No newline at end of file