diff --git a/types/global.d.ts b/types/global.d.ts
new file mode 100644
index 0000000..3d75b17
--- /dev/null
+++ b/types/global.d.ts
@@ -0,0 +1,20 @@
+import { PostgrestError } from '@supabase/postgrest-js';
+
+export {};
+
+declare global {
+	interface Note {
+		title: string;
+		description: string;
+	}
+
+	interface ApiResponse {
+		status: number;
+		message: string;
+		error: PostgrestError | null;
+	}
+
+	interface DeleteResponse extends ApiResponse {
+		data: undefined[] | null;
+	}
+}