This Go library provides simple bindings to the excellent "Have I Been Pwned" (HIBP) API by Troy Hunt. It implements all 3 APIs that are provided by HIBP (Breaches, Pastes, Passwords). API key support for the private API endpoints are supported as well. go-hibp follows idiomatic Go style and best practice. It's only depends on the Go standard library and one of my other packages: niljson.
The library is fully documented using the excellent GoDoc functionality. Check out the GoDocs Reference for details on how to implement access to any of the 3 APIs with this package. You will also find GoDoc code examples there for each of those APIs.