diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..ce30d4e
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,141 @@
+/// <reference types="node" />
+/// <reference types="es6-promise" />
+
+export namespace expectedVersion {
+    const any: number;
+    const noStream: number;
+    const emptyStream: number;
+}
+
+export namespace positions {
+    const start: Position;
+    const end: Position;
+}
+
+export interface EventData {
+}
+
+export function createJsonEventData(eventId: string, event: any, metadata?: any, type?: string): EventData;
+
+export function createEventData(eventId: string, type: string, isJson: boolean, data: Buffer, metadata?: Buffer): EventData;
+
+export interface TcpEndPoint {
+    port: number;
+    hostname: string;
+}
+
+export interface GossipSeed {
+    new (endPoint: TcpEndPoint, hostHeader: string);
+    readonly endPoint: TcpEndPoint;
+    readonly hostHeader: string;
+}
+
+export interface Logger {
+    debug(fmt: string, ...args: any[]): void;
+    info(fmt: string, ...args: any[]): void;
+    error(fmt: string, ...args: any[]): void;
+}
+
+export interface UserCredentials {
+    new (username: string, password: string);
+}
+
+export interface ConnectionSettings {
+    log?: Logger,
+    verboseLogging?: boolean,
+
+    maxQueueSize?: number,
+    maxConcurrentItems?: number,
+    maxRetries?: number,
+    maxReconnections?: number,
+
+    requireMaster?: boolean,
+
+    reconnectionDelay?: number,
+    operationTimeout?: number,
+    operationTimeoutCheckPeriod?: number,
+
+    defaultUserCredentials?: UserCredentials,
+    useSslConnection?: boolean,
+    targetHost?: TcpEndPoint,
+    validateServer?: boolean,
+
+    failOnNoServerResponse?: boolean,
+    heartbeatInterval?: number,
+    heartbeatTimeout?: number,
+    clientConnectionTimeout?: number,
+
+    // Cluster Settings
+    clusterDns?: string,
+    maxDiscoverAttempts?: number,
+    externalGossipPort?: number,
+    gossipTimeout?: number
+}
+
+export interface WriteResult {
+    readonly nextExpectedVersion: number;
+    readonly logPosition: Position;
+}
+
+export interface RecordedEvent {
+    readonly eventStreamId: string;
+    readonly eventId: string;
+    readonly eventNumber: number;
+    readonly eventType: string;
+    readonly createdEpoch: number;
+    readonly data?: Buffer;
+    readonly metadata?: Buffer;
+    readonly isJson: boolean;
+}
+
+export interface ResolvedEvent {
+    readonly event?: RecordedEvent;
+    readonly link?: RecordedEvent;
+    readonly originalEvent?: RecordedEvent;
+    readonly isResolved: boolean;
+    readonly originalPosition?: Position;
+    readonly originalStreamId: string;
+    readonly originalEventNumber: number;
+}
+
+export interface StreamEventsSlice {
+    readonly status: string;        // TODO: enum
+    readonly stream: string;
+    readonly fromEventNumber: number;
+    readonly readDirection: string; // TODO: enum
+    readonly events: ResolvedEvent[];
+    readonly nextEventNumber: number;
+    readonly lastEventNumber: number;
+    readonly isEndOfStream: boolean;
+}
+
+export interface EventStoreSubscription {
+    readonly isSubscribedToAll: boolean;
+    readonly streamId: string;
+    readonly lastCommitPosition: Position;
+    readonly lastEventNumber: number;
+
+    close(): void;
+    unsubscribe(): void;
+}
+
+export interface EventAppearedCallback {
+    (subscription: EventStoreSubscription, event: EventData);
+}
+
+export interface SubscriptionDroppedCallback {
+    (subscription: EventStoreSubscription, reason: string, error?: Error);
+}
+
+export interface EventStoreNodeConnection {
+    connect(): Promise<void>;
+    close(): void;
+    appendToStream(stream: string, expectedVersion: number, events: EventData[], userCredentials?: UserCredentials): Promise<WriteResult>;
+    readStreamEventsForward(stream: string, start: number, count: number, resolveLinkTos: boolean, userCredentials?: UserCredentials): Promise<StreamEventsSlice>;
+    subscribeToStream(stream: string, resolveLinkTos: boolean, eventAppeared: EventAppearedCallback, subscriptionDropped?: SubscriptionDroppedCallback, userCredentials?: UserCredentials): Promise<EventStoreSubscription>;
+
+    on(event: "connected" | "disconnected" | "reconnecting" | "closed" | "error", listener: Function): this;
+    once(event: "connected" | "disconnected" | "reconnecting" | "closed" | "error", listener: Function): this;
+}
+
+export function createConnection(settings: ConnectionSettings, endPointOrGossipSeed: string | TcpEndPoint | GossipSeed[], connectionName?: string): EventStoreNodeConnection;
diff --git a/package.json b/package.json
index 0f184f8..872c3f1 100644
--- a/package.json
+++ b/package.json
@@ -3,6 +3,7 @@
   "version": "0.0.10",
   "description": "A port of the EventStore .Net ClientAPI to Node.js",
   "main": "index.js",
+  "types": "index.d.ts",
   "scripts": {
     "clean": "rm lib/dist.js",
     "build": "webpack",
@@ -37,6 +38,7 @@
   },
   "homepage": "https://github.com/nicdex/eventstore-node#readme",
   "dependencies": {
+    "@types/es6-promise": "0.0.32",
     "long": "^3.2",
     "protobufjs": "^5.0",
     "uuid": "^2.0"