Do you want to share shell command history across multiple servers with a decent interface? If you have a ton of servers and lots of arcane commands with a half dozen parameters, I'm guessing you do. This is my attempt at solving this problem using a curses client for searching paired with a simple API and Web server backed by a nice search engine (Elasticsearch).
The curses client for searching and sorting history. It can be used without the server backend if you just want to try it out and not get a Web server running.
The project is split in two, and the client is actually pretty cool without the Web server. To get started, check out the documentation.