diff --git a/apps/jscad-web/main.js b/apps/jscad-web/main.js
index 7b7740e..3d2cecd 100644
--- a/apps/jscad-web/main.js
+++ b/apps/jscad-web/main.js
@@ -11,7 +11,7 @@ import {
 import { Gizmo } from '@jscadui/html-gizmo'
 import { OrbitControl } from '@jscadui/orbit'
 import { genParams } from '@jscadui/params'
-import { initMessaging, messageProxy } from '@jscadui/postmessage'
+import { messageProxy } from '@jscadui/postmessage'
 
 import defaultCode from './examples/jscad.example.js'
 import * as editor from './src/editor.js'
@@ -194,7 +194,7 @@ const handlers = {
 }
 
 /** @type {JscadWorker} */
-const workerApi = messageProxy(worker, handlers, { onJobCount: trackJobs })
+const workerApi = globalThis.workerApi = messageProxy(worker, handlers, { onJobCount: trackJobs })
 
 const progress = byId('progress')
 let jobs = 0
diff --git a/apps/jscad-web/static/test.api.js b/apps/jscad-web/static/test.api.js
new file mode 100644
index 0000000..ad2c738
--- /dev/null
+++ b/apps/jscad-web/static/test.api.js
@@ -0,0 +1,16 @@
+import * as jscad from '@jscad/modeling'
+
+export const main =({// @jscad-params
+  mesh,// {type:"file"}
+  check=false,
+  bla='test',
+  bla1='test', // {type:'choice', values:["a","b"]}
+})=>{  
+  return mesh ? mesh : jscad.primitives.sphere()
+
+}
+
+export const cube = async ()=>{
+  console.log('cube 5')
+  return jscad.primitives.cube()
+}
\ No newline at end of file
diff --git a/packages/postmessage/index.js b/packages/postmessage/index.js
index 045145c..c8c683f 100644
--- a/packages/postmessage/index.js
+++ b/packages/postmessage/index.js
@@ -148,7 +148,7 @@ export const messageProxy = (_self, handlers, {sender, onJobCount}={}) => {
   },{
     get(target, prop, receiver) {
       if(prop in target)  return target[prop]
-      if(prop.startsWith('on')){
+      if(prop.startsWith('on') && (prop.length == 2 || prop[2] == prop[2].toUpperCase())){
         return target[prop] = function(...params){
           sendNotify(prop, params)
         }  
diff --git a/packages/worker/worker.js b/packages/worker/worker.js
index 9063051..d3a431c 100644
--- a/packages/worker/worker.js
+++ b/packages/worker/worker.js
@@ -1,5 +1,5 @@
 import { JscadToCommon } from '@jscadui/format-jscad'
-import { initMessaging, withTransferable } from '@jscadui/postmessage'
+import { messageProxy, withTransferable } from '@jscadui/postmessage'
 import { clearFileCache, jscadClearTempCache, readFileWeb, require, requireCache, resolveUrl } from '@jscadui/require'
 
 import { exportStlText } from './src/exportStlText.js'
@@ -49,9 +49,9 @@ import { extractPathInfo, readAsArrayBuffer, readAsText } from '../fs-provider/f
 */
 
 let main
-self.JSCAD_WORKER_ENV = {}
+let scriptModule = {}
+globalThis.JSCAD_WORKER_ENV = {}
 let transformFunc = x => x
-let client
 let globalBase = location.origin
 let userInstances
 let importData
@@ -126,7 +126,6 @@ const jscadScript = async ({ script, url='jscad.js', base=globalBase, root=base
   const shouldTransform = url.endsWith('.ts') || script.includes('import') && (importReg.test(script) || exportReg.test(script))
   let def = []
   
-  let scriptModule
   try{
     scriptModule = require({url,script}, shouldTransform ? transformFunc : undefined, readFileWeb, base, root, importData)
   }catch(e){
@@ -170,13 +169,18 @@ const jscadExportData = async (params) => {
 export const currentSolids = ()=>solids
 
 const handlers = { jscadScript, jscadInit, jscadMain, jscadClearTempCache, jscadClearFileCache:clearFileCache, jscadExportData }
-
+// allow main thread to call worker methods and any method from the loaded script
+const handlersProxy = new Proxy(handlers, {
+  get(target, prop, receiver) {
+    return target[prop] || scriptModule[prop]
+  }
+})
 export const initWorker = (transform, jscadExportData, _importData) => {
   if (transform) transformFunc = transform
   if(jscadExportData) handlers.jscadExportData = jscadExportData
   importData = _importData
 
-  client = initMessaging(self, handlers)
+  JSCAD_WORKER_ENV.client = messageProxy(self, handlersProxy)
 }