diff --git a/src/index.js b/src/index.js
index bd70ef0..bee70d2 100644
--- a/src/index.js
+++ b/src/index.js
@@ -9,7 +9,7 @@ export { ZalgoPromise as Promise } from 'zalgo-promise/src';
 export * from './types';
 export { ProxyWindow } from './serialize';
 export { setup, destroy, serializeMessage, deserializeMessage, createProxyWindow, toProxyWindow } from './setup';
-export { on, once, send } from './public';
+export { on, once, send, listenerExists } from './public';
 export { markWindowKnown } from './lib';
 export { cleanUpWindow } from './clean';
 
diff --git a/src/public/exists.js b/src/public/exists.js
new file mode 100644
index 0000000..a4df272
--- /dev/null
+++ b/src/public/exists.js
@@ -0,0 +1,32 @@
+/* @flow */
+
+import { getRequestListener } from '../drivers';
+import type { ServerOptionsType } from '../types';
+
+const getDefaultServerOptions = () : ServerOptionsType => {
+    // $FlowFixMe
+    return {};
+};
+
+export function listenerExists(name : string, options : ?ServerOptionsType) : boolean {
+
+    if (!name) {
+        throw new Error('Expected name');
+    }
+
+    options = options || getDefaultServerOptions();
+
+    const win = options.window;
+    const domain = options.domain;
+
+    if (Array.isArray(domain)) {
+        for (const item of domain) {
+            if (getRequestListener({ name, win, domain: item })) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    return Boolean(getRequestListener({ name, win, domain }));
+}
diff --git a/src/public/index.js b/src/public/index.js
index 27569ea..709cb19 100644
--- a/src/public/index.js
+++ b/src/public/index.js
@@ -2,3 +2,4 @@
 
 export * from './on';
 export * from './send';
+export * from './exists';