diff --git a/internal/http/validate.go b/internal/http/validate.go
index d6701c63..73c4c95c 100644
--- a/internal/http/validate.go
+++ b/internal/http/validate.go
@@ -65,5 +65,5 @@ var mcpServerAllowedFields = map[string]bool{
 var channelInstanceAllowedFields = map[string]bool{
 	"channel_type": true, "credentials": true, "agent_id": true,
 	"enabled": true, "group_policy": true, "allow_from": true,
-	"metadata": true, "webhook_secret": true,
+	"metadata": true, "webhook_secret": true, "config": true,
 }