I'm an amateur hobby programmer, and I'd like to make a library for some Steam APIs like Steamworks or Steam Input. To do that, I'd need to be able to test Steam APIs, but the problem is I do not have the $100 needed to publish a game (where I live it's really a lot of money). In fact, I'm not even planning to publish a game there yet, I just need some way to test Steam APIs to be able to develop for it.

Is there any way to do that? Either officially or unofficially (alternative Steam API-compatible servers, for example)