diff --git a/packages/reffects/index.d.ts b/packages/reffects/index.d.ts
new file mode 100644
index 0000000..dce7581
--- /dev/null
+++ b/packages/reffects/index.d.ts
@@ -0,0 +1,31 @@
+interface Event {
+    id: string;
+    payload?: object;
+}
+
+interface Effect {
+    [effectName: string]: object
+}
+
+interface Coeffect{
+    id: string;
+    data?: object;
+}
+
+type EventHandler = (coeffect?: Coeffect, payload?: object) => Effect;
+
+type EffectHandler = Function;
+
+type CoeffectHandler = Function;
+
+export function dispatch(event: Event): void;
+export function dispatchMany(events: Event[]): void;
+export function dispatchLater(event: Event): void;
+export function registerEventHandler(eventId: string, handler: EventHandler, coeffectDescriptions?: Coeffect[]): void;
+export function registerCoeffectHandler(coeffectId: string, handler: CoeffectHandler): void;
+export function registerEffectHandler(effectId: string, handler: EffectHandler): void;
+export function registerEventsDelegation(originalEvents: string[], targetEvent: string): void;
+export function coeffect(id: string, data?: object): Coeffect;
+export function getEffectHandler(effectId: string): EffectHandler; 
+export function getCoeffectHandler(coeffectId: string): CoeffectHandler;
+export function getEventHandler(eventId: string): EventHandler;
diff --git a/packages/reffects/package.json b/packages/reffects/package.json
index d256ece..9fd3788 100644
--- a/packages/reffects/package.json
+++ b/packages/reffects/package.json
@@ -7,6 +7,7 @@
   "main": "dist/reffects.js",
   "umd:main": "dist/reffects.umd.js",
   "keywords": [],
+  "types": "index.d.ts",
   "devDependencies": {
     "@babel/core": "^7.4.3",
     "@babel/preset-env": "^7.4.3",