Hello The TeaPot documentation [1] references Mustache [2] in the section 4.1. Response Transformers [3] There is an example for a JSON transformation but none for Mustache. Where do I find some information how to use Mustache together with Teapot? Regards Hannes [1] https://ci.inria.fr/pharo-contribution/job/EnterprisePharoBook/lastSuccessfu... [2] https://ci.inria.fr/pharo-contribution/job/EnterprisePharoBook/lastSuccessfu... [3] The responsibility of a response transformer is to convert the output of the action block to HTML and to set the content-type of the response. Some response transformers require external packages (e.g., NeoJSON, STON, Mustache). [4] Adapted example TLWebserver teapot GET: '/jsonlist' -> #(1 2 3 4); output: #json.