Building an integration between MPOS and a CRM system via Retail Server / CRT meant deserializing JSON REST responses into C# classes. Writing those classes and their properties by hand for every response shape felt like the kind of thing that should already be automated.
It is: jsonutils.com takes a sample JSON API response and generates the C# classes to deserialize it.
Small time-saver, but a real one — worth bookmarking for the next CRT integration.