diff --git a/knotserver/middleware.go b/knotserver/middleware.go
index ae6280d6..5b579bc6 100644
--- a/knotserver/middleware.go
+++ b/knotserver/middleware.go
@@ -33,3 +33,21 @@ func (h *Knot) RequestLogger(next http.Handler) http.Handler {
 		)
 	})
 }
+
+func (h *Knot) CORS(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		// Set CORS headers
+		w.Header().Set("Access-Control-Allow-Origin", "*")
+		w.Header().Set("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS")
+		w.Header().Set("Access-Control-Allow-Headers", "Content-Type, Authorization")
+		w.Header().Set("Access-Control-Max-Age", "86400")
+
+		// Handle preflight requests
+		if r.Method == "OPTIONS" {
+			w.WriteHeader(http.StatusOK)
+			return
+		}
+
+		next.ServeHTTP(w, r)
+	})
+}