diff --git a/keeperapi/src/auth.ts b/keeperapi/src/auth.ts
index d6e5616..fcac66c 100644
--- a/keeperapi/src/auth.ts
+++ b/keeperapi/src/auth.ts
@@ -356,6 +356,30 @@ export class Auth {
         this.routerSocket.onCloseMessage(callback)
     }
 
+    /**
+     * Send an outbound frame over the router socket opened by connectToRouter.
+     * Pass a string to send a JSON/text frame (used for ephemeral, non-persisted
+     * events such as "typing"), or a Uint8Array for a binary frame. The frame is
+     * dropped if the router socket is not connected. Inbound events are still
+     * received via onRouterMessage.
+     */
+    sendToRouter(message: string | Uint8Array): void {
+        if (!this.routerSocket) {
+            logger.debug('Router socket not connected; dropping outbound frame')
+            return
+        }
+        // Symmetric with the inbound 'Router message received' log in connectToRouter.
+        if (isLevelEnabled('debug')) {
+            const text = typeof message === 'string' ? message : platform.bytesToString(message)
+            try {
+                logger.debug('Router message sent', JSON.parse(text))
+            } catch {
+                logger.debug('Router message sent', text)
+            }
+        }
+        this.routerSocket.send(message)
+    }
+
     /**
      * @param {LoginPayload} payload - Options for login.
      * @param {boolean} [payload.disableLinkingForAccountWithYubikey2fa] -
diff --git a/keeperapi/src/socket.ts b/keeperapi/src/socket.ts
index 9661a23..f0b27f7 100644
--- a/keeperapi/src/socket.ts
+++ b/keeperapi/src/socket.ts
@@ -175,6 +175,17 @@ export class SocketListener {
         this.socket.send(sessionToken)
     }
 
+    // Send an outbound frame over the socket. Strings are sent as text frames,
+    // Uint8Array as binary. The underlying SocketProxy queues the message if the
+    // socket is still connecting and flushes once it opens.
+    send(message: string | Uint8Array) {
+        if (!this.socket) {
+            logger.warn('Cannot send: socket not available')
+            return
+        }
+        this.socket.send(message)
+    }
+
     onOpen(callback: () => void): void {
         this.onOpenListeners.push(callback)
     }