diff --git a/packages/core/api/debug.js b/packages/core/api/debug.js
new file mode 100644
index 000000000..7d849be41
--- /dev/null
+++ b/packages/core/api/debug.js
@@ -0,0 +1,19 @@
+export default class Debug {
+  strip(item) {
+    return JSON.stringify({
+      title: !!item.title,
+      description: !!item.description,
+      headline: !!item.headline,
+      colored: !!item.color,
+      type: item.type,
+      notebooks: item.notebooks,
+      tags: item.tags,
+      id: item.id,
+      contentId: item.contentId,
+      dateEdited: item.dateEdited,
+      dateDeleted: item.dateDeleted,
+      dateCreated: item.dateCreated,
+      additionalData: item.additionalData,
+    });
+  }
+}
diff --git a/packages/core/api/index.js b/packages/core/api/index.js
index 375da43ee..5bbb2c9ad 100644
--- a/packages/core/api/index.js
+++ b/packages/core/api/index.js
@@ -21,6 +21,7 @@ import http from "../utils/http";
 import Monographs from "./monographs";
 import Offers from "./offers";
 import Attachments from "../collections/attachments";
+import Debug from "./debug";
 
 /**
  * @type {EventSource}
@@ -51,7 +52,8 @@ class Database {
   async init() {
     EV.subscribeMulti(
       [EVENTS.userLoggedIn, EVENTS.userFetched, EVENTS.tokenRefreshed],
-      this.connectSSE.bind(this)
+      this.connectSSE,
+      this
     );
     EV.subscribe(EVENTS.attachmentDeleted, async (attachment) => {
       console.log("deleted:", attachment);
@@ -81,6 +83,7 @@ class Database {
     this.outbox = new Outbox(this);
     this.monographs = new Monographs(this);
     this.offers = new Offers();
+    this.debug = new Debug();
 
     // collections
     /** @type {Notes} */
diff --git a/packages/core/utils/event-manager.js b/packages/core/utils/event-manager.js
index 5340d985e..c1cb778fb 100644
--- a/packages/core/utils/event-manager.js
+++ b/packages/core/utils/event-manager.js
@@ -7,9 +7,9 @@ class EventManager {
     this._registry.clear();
   }
 
-  subscribeMulti(names, handler) {
+  subscribeMulti(names, handler, thisArg) {
     names.forEach((name) => {
-      this.subscribe(name, handler);
+      this.subscribe(name, handler.bind(thisArg));
     });
   }