diff --git "a/api/src/routes/channels/\043channel_id/messages/index.ts" "b/api/src/routes/channels/\043channel_id/messages/index.ts"
index 296bec9..a0834be 100644
--- "a/api/src/routes/channels/\043channel_id/messages/index.ts"
+++ "b/api/src/routes/channels/\043channel_id/messages/index.ts"
@@ -119,7 +119,7 @@
 			x.attachments?.forEach((x) => {
 				// dynamically set attachment proxy_url in case the endpoint changed
 				const uri = x.proxy_url.startsWith("http") ? x.proxy_url : `https://example.org${x.proxy_url}`;
-				x.proxy_url = `${endpoint == null ? "http://localhost:3003" : endpoint}${new URL(uri).pathname}`;
+				x.proxy_url = `${endpoint == null ? "" : endpoint}${new URL(uri).pathname}`;
 			});
 
 			return x;