[sunkarapk]

I think https://github.com/pksunkara/alpaca is a good starting point. Given a web API, it generates client libraries in ruby, python, php and node.js

[nodesocket]

Are there any other alternatives to alpaca? How is the quality of the generate client code?

[sunkarapk]

No, as far as I know, alpaca is the first of its type. As the author of the code, I can guarantee good quality of the generated client code. I have written the templates such that they follow their respective language conventions and ecosystems.