You can check it out here: https://github.com/ayasin/frhttp (or npm install frhttp)
I've written some blog posts about how to use it here:
Part 1:
https://medium.com/@ayasin/functional-reactive-http-in-node-part-1-a475d53908d9
Part 2:
https://medium.com/@ayasin/functional-reactive-http-in-node-part-2-36cf579276ff
Part 3:
https://medium.com/@ayasin/functional-reactive-http-in-node-part-3-6c3a2a7d1e56
It's already scratching my own itch (though I'm still actively adding features), and I'd love to hear how it can expand to help others.