outputFilename and trace parameters, mapping to the Gotenberg-Output-Filename and Gotenberg-Trace request headers:
LibreOffice.convert(), and every PDFEngines method.
System routes
The System routes accepttrace too (there’s no resulting file, so no outputFilename):
Webhooks
Every route also acceptswebhook for switching a request to Gotenberg’s asynchronous, callback-based mode:
webhookUrl or webhookErrorUrl is required when webhook is set. See Gotenberg’s webhook docs for the async delivery model.