diff --git a/backend/app/schemas/device.py b/backend/app/schemas/device.py
index 05521a6..8f0a371 100644
--- a/backend/app/schemas/device.py
+++ b/backend/app/schemas/device.py
@@ -20,6 +20,7 @@ class DeviceCreate(BaseModel):
     ssh_password_override: Optional[str] = None  # plaintext, encrypted on write
     ssh_port_override: Optional[int] = None
     ssh_key_id_override: Optional[int] = None
+    connection_params: dict[str, Any] = {}
     device_meta: dict[str, Any] = {}
     monitor_enabled: bool = False
     notes: Optional[str] = None
@@ -53,6 +54,7 @@ class DeviceUpdate(BaseModel):
     ssh_password_override: Optional[str] = None
     ssh_port_override: Optional[int] = None
     ssh_key_id_override: Optional[int] = None
+    connection_params: Optional[dict[str, Any]] = None
     device_meta: Optional[dict[str, Any]] = None
     monitor_enabled: Optional[bool] = None
     notes: Optional[str] = None
@@ -78,6 +80,7 @@ class DeviceRead(BaseModel):
     ssh_port_override: Optional[int] = None
     ssh_key_id_override: Optional[int] = None
     ssh_last_auth: Optional[dict[str, Any]] = None
+    connection_params: dict[str, Any] = {}
     device_meta: dict[str, Any] = {}
     capabilities: list[str] = []
     monitor_enabled: bool