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 dependency is the Go Standard Library.
The library is fully documented using the execellent 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.