rustfm-scrobble is a Last.fm scrobble API crate for Rust. It lets you publish song-play information (scrobbles) to Last.fm via a simple Rust API.
I've been slowly working on this for a couple of years, after originally building it to implement a Spotify Connect API scrobbling service when the Alexa/Amazon Echo Spotify client didn't support scrobbling to Last.fm. My goal for Hacktoberfest 2019 was to take advantage of a big community effort to finally release version 1.0 of the library.