diff --git a/examples/Components/Routes/Collaboration/index.vue b/examples/Components/Routes/Collaboration/index.vue
index e7420bc4..19f5ab06 100644
--- a/examples/Components/Routes/Collaboration/index.vue
+++ b/examples/Components/Routes/Collaboration/index.vue
@@ -18,7 +18,15 @@
 <script>
 import io from 'socket.io-client'
 import { Editor, EditorContent } from 'tiptap'
-import { History, Collaboration } from 'tiptap-extensions'
+import {
+  HardBreak,
+  Heading,
+  Bold,
+  Code,
+  Italic,
+  History,
+  Collaboration,
+} from 'tiptap-extensions'
 
 export default {
   components: {
@@ -45,6 +53,11 @@ export default {
       this.editor = new Editor({
         content: doc,
         extensions: [
+          new HardBreak(),
+          new Heading({ levels: [1, 2, 3] }),
+          new Bold(),
+          new Code(),
+          new Italic(),
           new History(),
           new Collaboration({
             // the initial version we start with
diff --git a/packages/tiptap-extensions/src/extensions/Collaboration.js b/packages/tiptap-extensions/src/extensions/Collaboration.js
index 5eacd203..3b4a122c 100644
--- a/packages/tiptap-extensions/src/extensions/Collaboration.js
+++ b/packages/tiptap-extensions/src/extensions/Collaboration.js
@@ -54,7 +54,11 @@ export default class Collaboration extends Extension {
     const sendable = sendableSteps(state)
 
     if (sendable) {
-      this.options.onSendable(sendable)
+      this.options.onSendable({
+        version: sendable.version,
+        steps: sendable.steps.map(step => step.toJSON()),
+        clientID: sendable.clientID,
+      })
     }
   }, this.options.debounce)
 
diff --git a/packages/tiptap/src/Editor.js b/packages/tiptap/src/Editor.js
index d9997cb9..bc35201a 100644
--- a/packages/tiptap/src/Editor.js
+++ b/packages/tiptap/src/Editor.js
@@ -342,6 +342,13 @@ export default class Editor extends Emitter {
     this.view.dom.blur()
   }
 
+  getSchemaJSON() {
+    return JSON.parse(JSON.stringify({
+      nodes: this.extensions.nodes,
+      marks: this.extensions.marks,
+    }))
+  }
+
   getHTML() {
     const div = document.createElement('div')
     const fragment = DOMSerializer