diff --git a/api/index.js b/api/index.js
index a63a7b2..c842f2d 100644
--- a/api/index.js
+++ b/api/index.js
@@ -2,7 +2,6 @@
 // Path: /api
 
 async function handler(request) {
-  // CORS headers for browser requests
   const corsHeaders = {
     'Access-Control-Allow-Origin': '*',
     'Access-Control-Allow-Methods': 'GET, POST, OPTIONS',
@@ -37,5 +36,5 @@ async function handler(request) {
   })
 }
 
-// Export for wws
-module.exports = { handler }
+// ES Module export for wws
+export default handler
diff --git a/chat/index.js b/chat/index.js
index 45d6058..19b2a2d 100644
--- a/chat/index.js
+++ b/chat/index.js
@@ -22,8 +22,10 @@ async function handler(request) {
 
   try {
     const body = await request.json()
-    const { message, project_id, user_id, provider } = body
-    const selectedProvider = provider || 'zai'
+    const message = body.message
+    const project_id = body.project_id
+    const user_id = body.user_id
+    const provider = body.provider || 'zai'
 
     if (!message) {
       return new Response(JSON.stringify({ error: 'Message is required' }), {
@@ -40,7 +42,7 @@ async function handler(request) {
         message: message,
         project_id: project_id || null,
         user_id: user_id || null,
-        provider: selectedProvider,
+        provider: provider,
         source: 'wws-proxy',
         timestamp: new Date().toISOString()
       })
@@ -51,7 +53,7 @@ async function handler(request) {
     return new Response(JSON.stringify({
       success: true,
       response: result.response || result,
-      provider: selectedProvider,
+      provider: provider,
       timestamp: new Date().toISOString()
     }), {
       headers: corsHeaders
@@ -68,4 +70,5 @@ async function handler(request) {
   }
 }
 
-module.exports = { handler }
+// ES Module export for wws
+export default handler
diff --git a/webhook/index.js b/webhook/index.js
index 16b4141..6c8bfcd 100644
--- a/webhook/index.js
+++ b/webhook/index.js
@@ -34,15 +34,15 @@ async function handler(request) {
       let payload
       const contentType = request.headers.get('content-type') || ''
 
-      if (contentType.includes('application/json')) {
+      if (contentType.indexOf('application/json') !== -1) {
         payload = await request.json()
       } else {
         payload = await request.text()
       }
 
-      // Get source from query params (wws provides request.url as string)
+      // Get source from query params
       let source = 'default'
-      if (request.url && request.url.includes('?')) {
+      if (request.url && request.url.indexOf('?') !== -1) {
         const queryString = request.url.split('?')[1]
         if (queryString) {
           const params = queryString.split('&')
@@ -105,4 +105,5 @@ async function handler(request) {
   })
 }
 
-module.exports = { handler }
+// ES Module export for wws
+export default handler