diff --git a/apps/api/src/helper/data-source.helper.ts b/apps/api/src/helper/data-source.helper.ts
new file mode 100644
index 000000000..c4a55c9da
--- /dev/null
+++ b/apps/api/src/helper/data-source.helper.ts
@@ -0,0 +1,13 @@
+import { DataSource } from '@prisma/client';
+
+export function getMaskedGhostfolioDataSource({
+  dataSource,
+  ghostfolioDataSources
+}: {
+  dataSource: DataSource;
+  ghostfolioDataSources: string[];
+}) {
+  return ghostfolioDataSources.includes(dataSource)
+    ? DataSource.GHOSTFOLIO
+    : dataSource;
+}