diff --git a/desktop/src/app/preload.ts b/desktop/src/app/preload.ts
index 74bcb048..d406fbed 100644
--- a/desktop/src/app/preload.ts
+++ b/desktop/src/app/preload.ts
@@ -1,8 +1,11 @@
 import { contextBridge, ipcRenderer, IpcRendererEvent } from "electron";
+import type { WorkAdventureDesktopApi } from "./types";
 
-contextBridge.exposeInMainWorld("WorkAdventureDesktopApi", {
+const api: WorkAdventureDesktopApi = {
   desktop: true,
   notify: (txt: string) => ipcRenderer.send("app:notify", txt),
   onMutedKeyPress: (callback: (event: IpcRendererEvent) => void) =>
     ipcRenderer.on("app:on-muted-key-press", callback),
-});
+};
+
+contextBridge.exposeInMainWorld("WorkAdventureDesktopApi", api);
diff --git a/desktop/src/app/types.ts b/desktop/src/app/types.ts
new file mode 100644
index 00000000..a76f834f
--- /dev/null
+++ b/desktop/src/app/types.ts
@@ -0,0 +1,7 @@
+import type { IpcRendererEvent } from "electron";
+
+export type WorkAdventureDesktopApi = {
+  desktop: boolean;
+  notify: (txt: string) => void;
+  onMutedKeyPress: (callback: (event: IpcRendererEvent) => void) => void;
+};
diff --git a/desktop/src/settings.ts b/desktop/src/settings.ts
index fb61621c..3e923247 100644
--- a/desktop/src/settings.ts
+++ b/desktop/src/settings.ts
@@ -1,11 +1,6 @@
 import ElectronLog from "electron-log";
 import Settings from "electron-settings";
-
-type Server = {
-  _id: string;
-  name: string;
-  url: string;
-};
+import type { Server } from "./sidebar/types";
 
 type SettingsData = {
   log_level: ElectronLog.LogLevel;
diff --git a/desktop/src/sidebar/preload.ts b/desktop/src/sidebar/preload.ts
index 71ba33ed..3d159deb 100644
--- a/desktop/src/sidebar/preload.ts
+++ b/desktop/src/sidebar/preload.ts
@@ -1,10 +1,13 @@
 import { contextBridge, ipcRenderer } from "electron";
+import type { WorkAdventureSidebarApi } from "./types";
 
-contextBridge.exposeInMainWorld("WorkAdventureDesktopApi", {
+const api: WorkAdventureSidebarApi = {
   desktop: true,
   getServers: () => ipcRenderer.invoke("sidebar:getServers"),
   selectServer: (serverId: string) =>
     ipcRenderer.invoke("sidebar:selectServer", serverId),
   addServer: (serverName: string, serverUrl: string) =>
     ipcRenderer.invoke("sidebar:addServer", serverName, serverUrl),
-});
+};
+
+contextBridge.exposeInMainWorld("WorkAdventureDesktopApi", api);
diff --git a/desktop/src/sidebar/types.ts b/desktop/src/sidebar/types.ts
new file mode 100644
index 00000000..79114d1e
--- /dev/null
+++ b/desktop/src/sidebar/types.ts
@@ -0,0 +1,12 @@
+export type Server = {
+  _id: string;
+  name: string;
+  url: string;
+};
+
+export type WorkAdventureSidebarApi = {
+  desktop: boolean;
+  getServers: () => Promise<Server[]>;
+  selectServer: (serverId: string) => Promise<Error | boolean>;
+  addServer: (serverName: string, serverUrl: string) => Promise<boolean>;
+};