Htop is more graphical than top, and they both work in shell.. if by self-hosted you mean there's an external API to read it, neither of those will do it unless

Htop is more graphical than top, and they both work in shell.. if by self-hosted you mean there's an external API to read it, neither of those will do it unless you screen scrape... You could use nagios which has an http based api and is quite comprehensive and extensible.