diff --git a/types/chromecast-caf-sender/chromecast-caf-sender-tests.ts b/types/chromecast-caf-sender/chromecast-caf-sender-tests.ts
new file mode 100644
index 0000000000..49e2bf5fee
--- /dev/null
+++ b/types/chromecast-caf-sender/chromecast-caf-sender-tests.ts
@@ -0,0 +1,134 @@
+cast.framework.VERSION === "1.0.06";
+cast.framework.setLoggerLevel(cast.framework.LoggerLevel.DEBUG);
+
+const context = cast.framework.CastContext.getInstance();
+context.getCastState() === cast.framework.CastState.CONNECTED;
+context.getSessionState() === cast.framework.SessionState.NO_SESSION;
+
+context.setOptions({
+  autoJoinPolicy: chrome.cast.AutoJoinPolicy.ORIGIN_SCOPED,
+  language: "en-US",
+  receiverApplicationId: "test",
+  resumeSavedSession: true
+});
+
+context.addEventListener(
+  cast.framework.CastContextEventType.CAST_STATE_CHANGED,
+  event => {
+    const { castState } = event;
+  }
+);
+context.addEventListener(
+  cast.framework.CastContextEventType.SESSION_STATE_CHANGED,
+  event => {
+    const { sessionState } = event;
+  }
+);
+
+const handleSessionStateChange = (
+  event: cast.framework.SessionStateEventData
+) => {};
+context.removeEventListener(
+  cast.framework.CastContextEventType.SESSION_STATE_CHANGED,
+  handleSessionStateChange
+);
+
+context.requestSession().then(err => {
+  if (err === chrome.cast.ErrorCode.CHANNEL_ERROR) return;
+
+  const session = cast.framework.CastContext.getInstance().getCurrentSession();
+  if (!session) return;
+
+  const handleError = (err?: chrome.cast.ErrorCode) => {};
+
+  session.getSessionObj().sessionId === session.getSessionId();
+  session.getSessionState() === cast.framework.SessionState.SESSION_STARTED;
+  session.getCastDevice().name;
+  session.getApplicationMetadata().applicationId;
+  session.getApplicationStatus() === "";
+  session.getActiveInputState() ===
+    cast.framework.ActiveInputState.ACTIVE_INPUT_STATE_UNKNOWN;
+  session.endSession(false);
+  session.setVolume(0.5).then(handleError);
+  session.getVolume() === 0.5;
+  session.setMute(true).then(handleError);
+  session.isMute();
+  session.sendMessage("namespace", { obj: 1 }).then(handleError);
+  session.sendMessage("namespace", "string");
+  session.sendMessage("namespace", 2);
+
+  session.addMessageListener("namespace", (namespace, message) => {});
+  session.removeMessageListener("namespace", (namespace, message) => {});
+
+  const req = new chrome.cast.media.LoadRequest(
+    new chrome.cast.media.MediaInfo("id", "type")
+  );
+  session.loadMedia(req);
+
+  const media = session.getMediaSession();
+  if (media && media.sessionId) {
+  }
+
+  session.addEventListener(
+    cast.framework.SessionEventType.ACTIVE_INPUT_STATE_CHANGED,
+    ({ activeInputState }) => {}
+  );
+  session.addEventListener(
+    cast.framework.SessionEventType.APPLICATION_METADATA_CHANGED,
+    ({ metadata }) => {}
+  );
+  session.addEventListener(
+    cast.framework.SessionEventType.APPLICATION_STATUS_CHANGED,
+    ({ status }) => {}
+  );
+  session.addEventListener(
+    cast.framework.SessionEventType.MEDIA_SESSION,
+    ({ mediaSession }) => {}
+  );
+  session.addEventListener(
+    cast.framework.SessionEventType.VOLUME_CHANGED,
+    ({ volume }) => {}
+  );
+  session.removeEventListener(
+    cast.framework.SessionEventType.VOLUME_CHANGED,
+    ({ volume }) => {}
+  );
+});
+
+const player = new cast.framework.RemotePlayer();
+{
+  const bool: boolean =
+    player.isConnected &&
+    player.isMediaLoaded &&
+    player.canControlVolume &&
+    player.isPaused &&
+    player.isMuted &&
+    player.canPause &&
+    player.canSeek;
+  const sum: number = player.duration + player.currentTime + player.volumeLevel;
+  const str: string =
+    player.displayName + player.statusText + player.title + player.displayName;
+}
+player.mediaInfo && player.mediaInfo.contentId;
+player.imageUrl && player.imageUrl === "";
+player.playerState && player.playerState === chrome.cast.media.PlayerState.IDLE;
+player.savedPlayerState && player.savedPlayerState.currentTime;
+player.controller === null;
+
+const playerCtrl = new cast.framework.RemotePlayerController(player);
+player.controller === playerCtrl;
+playerCtrl.playOrPause();
+playerCtrl.stop();
+playerCtrl.seek();
+playerCtrl.muteOrUnmute();
+playerCtrl.setVolumeLevel();
+playerCtrl.getFormattedTime(60);
+playerCtrl.getSeekPosition(1, 60) === playerCtrl.getSeekTime(1, 60);
+playerCtrl.addEventListener(
+  cast.framework.RemotePlayerEventType.ANY_CHANGE,
+  () => {}
+);
+playerCtrl.removeEventListener(
+  cast.framework.RemotePlayerEventType.ANY_CHANGE,
+  () => {}
+);
diff --git a/types/chromecast-caf-sender/index.d.ts b/types/chromecast-caf-sender/index.d.ts
new file mode 100644
index 0000000000..e1e5c8ae65
--- /dev/null
+++ b/types/chromecast-caf-sender/index.d.ts
@@ -0,0 +1,306 @@
+// Type definitions for Cast Application Framework Sender API 1.0
+// Project: https://developers.google.com/cast/docs/caf_receiver_overview
+// Definitions by: Samuel Maddock <https://github.com/samuelmaddock>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.4
+
+/// <reference types="chrome" />
+/// <reference types="chrome/chrome-cast" />
+
+////////////////////
+// Global object
+////////////////////
+interface Window {
+  cast: typeof cast;
+}
+
+////////////////////
+// Framework
+////////////////////
+/**
+ * Cast Application Framework
+ * @see https://developers.google.com/cast/docs/reference/chrome/cast.framework
+ */
+declare namespace cast.framework {
+  enum LoggerLevel {
+    DEBUG,
+    INFO,
+    WARNING,
+    ERROR,
+    NONE
+  }
+
+  enum CastState {
+    NO_DEVICES_AVAILABLE = "NO_DEVICES_AVAILABLE",
+    NOT_CONNECTED = "NOT_CONNECTED",
+    CONNECTING = "CONNECTING",
+    CONNECTED = "CONNECTED"
+  }
+
+  enum SessionState {
+    NO_SESSION = "NO_SESSION",
+    SESSION_STARTING = "SESSION_STARTING",
+    SESSION_STARTED = "SESSION_STARTED",
+    SESSION_START_FAILED = "SESSION_START_FAILED",
+    SESSION_ENDING = "SESSION_ENDING",
+    SESSION_ENDED = "SESSION_ENDED",
+    SESSION_RESUMED = "SESSION_RESUMED"
+  }
+  enum CastContextEventType {
+    CAST_STATE_CHANGED = "caststatechanged",
+    SESSION_STATE_CHANGED = "sessionstatechanged"
+  }
+  enum SessionEventType {
+    APPLICATION_STATUS_CHANGED = "applicationstatuschanged",
+    APPLICATION_METADATA_CHANGED = "applicationmetadatachanged",
+    ACTIVE_INPUT_STATE_CHANGED = "activeinputstatechanged",
+    VOLUME_CHANGED = "volumechanged",
+    MEDIA_SESSION = "mediasession"
+  }
+  enum RemotePlayerEventType {
+    ANY_CHANGE = "anyChanged",
+    IS_CONNECTED_CHANGED = "isConnectedChanged",
+    IS_MEDIA_LOADED_CHANGED = "isMediaLoadedChanged",
+    DURATION_CHANGED = "durationChanged",
+    CURRENT_TIME_CHANGED = "currentTimeChanged",
+    IS_PAUSED_CHANGED = "isPausedChanged",
+    VOLUME_LEVEL_CHANGED = "volumeLevelChanged",
+    CAN_CONTROL_VOLUME_CHANGED = "canControlVolumeChanged",
+    IS_MUTED_CHANGED = "isMutedChanged",
+    CAN_PAUSE_CHANGED = "canPauseChanged",
+    CAN_SEEK_CHANGED = "canSeekChanged",
+    DISPLAY_NAME_CHANGED = "displayNameChanged",
+    STATUS_TEXT_CHANGED = "statusTextChanged",
+    TITLE_CHANGED = "titleChanged",
+    DISPLAY_STATUS_CHANGED = "displayStatusChanged",
+    MEDIA_INFO_CHANGED = "mediaInfoChanged",
+    IMAGE_URL_CHANGED = "imageUrlChanged",
+    PLAYER_STATE_CHANGED = "playerStateChanged"
+  }
+
+  enum ActiveInputState {
+    ACTIVE_INPUT_STATE_UNKNOWN = -1,
+    ACTIVE_INPUT_STATE_NO = 0,
+    ACTIVE_INPUT_STATE_YES = 1
+  }
+
+  interface CastOptions {
+    autoJoinPolicy: chrome.cast.AutoJoinPolicy;
+    language?: string;
+    receiverApplicationId?: string;
+    resumeSavedSession?: boolean;
+  }
+
+  const VERSION: string;
+  function setLoggerLevel(level: LoggerLevel): void;
+
+  class CastContext {
+    static getInstance(): CastContext;
+    setOptions(options: CastOptions): void;
+    getCastState(): CastState;
+    getSessionState(): SessionState;
+    requestSession(): Promise<chrome.cast.ErrorCode | undefined>;
+    getCurrentSession(): CastSession | null;
+    endCurrentSession(stopCasting: boolean): void;
+
+    addEventListener(
+      type: CastContextEventType.CAST_STATE_CHANGED,
+      handler: (event: CastStateEventData) => void
+    ): void;
+    addEventListener(
+      type: CastContextEventType.SESSION_STATE_CHANGED,
+      handler: (event: SessionStateEventData) => void
+    ): void;
+    removeEventListener(
+      type: CastContextEventType.CAST_STATE_CHANGED,
+      handler: (event: CastStateEventData) => void
+    ): void;
+    removeEventListener(
+      type: CastContextEventType.SESSION_STATE_CHANGED,
+      handler: (event: SessionStateEventData) => void
+    ): void;
+  }
+
+  class CastSession {
+    constructor(sessionObj: chrome.cast.Session, state: SessionState);
+    getSessionObj(): chrome.cast.Session;
+    getSessionId(): string;
+    getSessionState(): SessionState;
+    getCastDevice(): chrome.cast.Receiver;
+    getApplicationMetadata(): ApplicationMetadata;
+    getApplicationStatus(): string;
+    getActiveInputState(): ActiveInputState;
+    endSession(stopCasting: boolean): void;
+    setVolume(volume: number): Promise<chrome.cast.ErrorCode | undefined>;
+    getVolume(): number;
+    setMute(mute: boolean): Promise<chrome.cast.ErrorCode | undefined>;
+    isMute(): boolean;
+    sendMessage(
+      namespace: string,
+      data: any
+    ): Promise<chrome.cast.ErrorCode | undefined>;
+    addMessageListener(
+      namespace: string,
+      listener: (namespace: string, message: string) => void
+    ): void;
+    removeMessageListener(
+      namespace: string,
+      listener: (namespace: string, message: string) => void
+    ): void;
+    loadMedia(
+      request: chrome.cast.media.LoadRequest
+    ): Promise<chrome.cast.ErrorCode | undefined>;
+    getMediaSession(): chrome.cast.media.Media | null;
+
+    addEventListener(
+      type: SessionEventType.ACTIVE_INPUT_STATE_CHANGED,
+      handler: (event: ActiveInputStateEventData) => void
+    ): void;
+    addEventListener(
+      type: SessionEventType.APPLICATION_METADATA_CHANGED,
+      handler: (event: ApplicationMetadataEventData) => void
+    ): void;
+    addEventListener(
+      type: SessionEventType.APPLICATION_STATUS_CHANGED,
+      handler: (event: ApplicationStatusEventData) => void
+    ): void;
+    addEventListener(
+      type: SessionEventType.MEDIA_SESSION,
+      handler: (event: MediaSessionEventData) => void
+    ): void;
+    addEventListener(
+      type: SessionEventType.VOLUME_CHANGED,
+      handler: (event: VolumeEventData) => void
+    ): void;
+    removeEventListener(
+      type: SessionEventType.ACTIVE_INPUT_STATE_CHANGED,
+      handler: (event: ActiveInputStateEventData) => void
+    ): void;
+    removeEventListener(
+      type: SessionEventType.APPLICATION_METADATA_CHANGED,
+      handler: (event: ApplicationMetadataEventData) => void
+    ): void;
+    removeEventListener(
+      type: SessionEventType.APPLICATION_STATUS_CHANGED,
+      handler: (event: ApplicationStatusEventData) => void
+    ): void;
+    removeEventListener(
+      type: SessionEventType.MEDIA_SESSION,
+      handler: (event: MediaSessionEventData) => void
+    ): void;
+    removeEventListener(
+      type: SessionEventType.VOLUME_CHANGED,
+      handler: (event: VolumeEventData) => void
+    ): void;
+  }
+
+  class RemotePlayerController {
+    constructor(player: RemotePlayer);
+    playOrPause(): void;
+    stop(): void;
+    seek(): void;
+    muteOrUnmute(): void;
+    setVolumeLevel(): void;
+    getFormattedTime(timeInSec: number): string;
+    getSeekPosition(currentTime: number, duration: number): number;
+    getSeekTime(currentPosition: number, duration: number): number;
+
+    addEventListener(
+      type: RemotePlayerEventType,
+      handler: (event: RemotePlayerChangedEvent) => void
+    ): void;
+    removeEventListener(
+      type: RemotePlayerEventType,
+      handler: (event: RemotePlayerChangedEvent) => void
+    ): void;
+  }
+
+  interface SavedPlayerState {
+    mediaInfo: chrome.cast.media.PlayerState | null;
+    currentTime: number;
+    isPaused: boolean;
+  }
+
+  class RemotePlayer {
+    isConnected: boolean;
+    isMediaLoaded: boolean;
+    duration: number;
+    currentTime: number;
+    volumeLevel: number;
+    canControlVolume: boolean;
+    isPaused: boolean;
+    isMuted: boolean;
+    canPause: boolean;
+    canSeek: boolean;
+    displayName: string;
+    statusText: string;
+    title: string;
+    displayStatus: string;
+    mediaInfo?: chrome.cast.media.MediaInfo;
+    imageUrl: string | null;
+    playerState: chrome.cast.media.PlayerState | null;
+    savedPlayerState: SavedPlayerState | null;
+    controller: RemotePlayerController | null;
+  }
+
+  class ApplicationMetadata {
+    constructor(sessionObj: chrome.cast.Session);
+    applicationId: string;
+    images: chrome.cast.Image[];
+    name: string;
+    namespaces: string[];
+  }
+
+  abstract class EventData {
+    constructor(type: string);
+    type: string;
+  }
+
+  class ActiveInputStateEventData extends EventData {
+    constructor(activeInputState: ActiveInputState);
+    activeInputState: ActiveInputState;
+  }
+
+  class ApplicationMetadataEventData extends EventData {
+    constructor(metadata: ApplicationMetadata);
+    metadata: ApplicationMetadata;
+  }
+
+  class ApplicationStatusEventData extends EventData {
+    constructor(status: string);
+    status: string;
+  }
+
+  class CastStateEventData extends EventData {
+    constructor(castState: CastState);
+    castState: CastState;
+  }
+
+  class MediaSessionEventData extends EventData {
+    constructor(mediaSession: chrome.cast.media.Media);
+    mediaSession: chrome.cast.media.Media;
+  }
+
+  class RemotePlayerChangedEvent<T = any> extends EventData {
+    constructor(type: RemotePlayerEventType, field: string, value: T);
+    field: string;
+    value: T;
+  }
+
+  class SessionStateEventData extends EventData {
+    constructor(
+      session: CastSession,
+      sessionState: SessionState,
+      opt_errorCode: chrome.cast.ErrorCode
+    );
+    errorCode: chrome.cast.ErrorCode;
+    session: CastSession;
+    sessionState: SessionState;
+  }
+
+  class VolumeEventData extends EventData {
+    constructor(volume: number, isMute: boolean);
+    isMute: boolean;
+    volume: number;
+  }
+}
diff --git a/types/chromecast-caf-sender/tsconfig.json b/types/chromecast-caf-sender/tsconfig.json
new file mode 100644
index 0000000000..0d8a0cad6e
--- /dev/null
+++ b/types/chromecast-caf-sender/tsconfig.json
@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "chromecast-caf-sender-tests.ts"
+    ]
+}
diff --git a/types/chromecast-caf-sender/tslint.json b/types/chromecast-caf-sender/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/chromecast-caf-sender/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }