diff --git a/app/api/agent-workflow/detail-stitch/route.ts b/app/api/agent-workflow/detail-stitch/route.ts
index 9910f464f..fa9d48151 100644
--- a/app/api/agent-workflow/detail-stitch/route.ts
+++ b/app/api/agent-workflow/detail-stitch/route.ts
@@ -66,8 +66,15 @@ async function runBoundedParallel<T, R>(
 function getRequestOrigin(request: NextRequest): string {
   const forwardedHost = (request.headers.get("x-forwarded-host") || "").split(",")[0]?.trim();
   const forwardedProto = (request.headers.get("x-forwarded-proto") || "").split(",")[0]?.trim();
-  if (forwardedHost && forwardedProto) {
-    return `${forwardedProto}://${forwardedHost}`;
+  const host = forwardedHost || (request.headers.get("host") || "").split(",")[0]?.trim();
+  if (host) {
+    const requestUrl = new URL(request.url);
+    const isLocalHost =
+      host.startsWith("localhost") ||
+      host.startsWith("127.0.0.1") ||
+      host.startsWith("[::1]");
+    const proto = forwardedProto || (isLocalHost ? requestUrl.protocol.replace(/:$/, "") : "https");
+    return `${proto}://${host}`;
   }
   return new URL(request.url).origin;
 }