{"success":false,"error":"Invalid action: ","available_actions":{"templates":"Get available workflow templates","health":"Check N8N service health","list_workflows":"List existing workflows","test_connection":"Test N8N connection","deploy_template":"Get template deployment info","get_executions":"Get workflow execution history"},"usage":"Add ?action=ACTION_NAME to the URL","timestamp":"2026-04-16 13:40:10"}