diff --git a/lib/hub/hub_bridge_register.py b/lib/hub/hub_bridge_register.py
index 96cea1f..b113cc2 100644
--- a/lib/hub/hub_bridge_register.py
+++ b/lib/hub/hub_bridge_register.py
@@ -153,6 +153,16 @@ def _enrich_hub_protocol(snap: dict[str, Any], *, app_module: Any) -> dict[str,
             }
         )
 
+    _allowed = out.get("options_allowed_underlys")
+    if not isinstance(_allowed, list) or not _allowed:
+        _u0 = str(out.get("options_underly") or "ETH").strip().upper() or "ETH"
+        _allowed = [_u0] if _u0 in ("ETH", "BTC") else ["ETH", "BTC"]
+    else:
+        _allowed = [
+            str(x).strip().upper()
+            for x in _allowed
+            if str(x).strip().upper() in ("ETH", "BTC")
+        ] or ["ETH", "BTC"]
     out["instance"] = {
         "label": label,
         "mode": mode,
@@ -160,7 +170,9 @@ def _enrich_hub_protocol(snap: dict[str, Any], *, app_module: Any) -> dict[str,
         "account_label": out.get("account_label") or "",
         "margin_mode": out.get("options_margin_mode") or "coin",
         "underly": out.get("options_underly") or "ETH",
+        "allowed_underlys": _allowed,
     }
+    out["options_allowed_underlys"] = _allowed
     funding_usdt = out.get("funding_usdt")
     trading_usdt = out.get("trading_usdt")
     funding_usdc = out.get("funding_usdc")