psbase is a set of HTML, CGI, gnuplot, and shell-scripts which together form a complete public databasing system for SIESTA pseudopotentials and basis sets.
If you want to set up your own private database, it's available in an undocumented and somewhat rough state here : it's under an X11-type license, so you can do (within reason) whatever you want with it as long as you acknowledge my copyright. If you have any comments, I'd be delighted to hear from you.
You will need a webserver which can deal with CGI scripts written in Python, a version of Python >2 (it's written against Python 2.2), gnuplot, and a working binary of the atm code (distributed with SIESTA).
You might want to go back now.