I'm a programmer and I've made my own RSS / Atom feeds before for projects with hosting so I know the coding side.
But I don't have a server or hosting for my own long-term domain and I don't intend to get one.
I'm wondering if there is a free online webapp that lets users build RSS feeds that they then host / publish.
I know there are some which automatically create a feed from any changing web page, but I want something that allows me to build the logic, either by writing arbitrary code in some programming language, or by providing sufficiently sophisticated tools.
I intend to create feed posts from information I put together from consuming web APIs, scraping pages, etc.