diff --git a/index.js b/index.js
index 8b13789..ee1ee32 100644
--- a/index.js
+++ b/index.js
@@ -1 +1,33 @@
+export default {
+  async fetch(request) {
+    const url = new URL(request.url);
+    // Forward path to Resend (e.g. /emails/batch)
+    const target = 'https://api.resend.com' + url.pathname + url.search;
 
+    // Handle Preflight (Browser checks permissions first)
+    if (request.method === "OPTIONS") {
+      return new Response(null, {
+        headers: {
+          "Access-Control-Allow-Origin": "*",
+          "Access-Control-Allow-Methods": "GET, POST, OPTIONS",
+          "Access-Control-Allow-Headers": "Content-Type, Authorization",
+        },
+      });
+    }
+
+    // Forward the actual request
+    const res = await fetch(target, {
+      method: request.method,
+      headers: request.headers,
+      body: request.body
+    });
+
+    // Return response with CORS headers allowed
+    const newHeaders = new Headers(res.headers);
+    newHeaders.set("Access-Control-Allow-Origin", "*");
+    return new Response(res.body, {
+      status: res.status,
+      headers: newHeaders
+    });
+  }
+}