I think it’s a bit of a shared frustration that AO3 doesn’t have a public API, which makes getting data harder than it could be.

I needed to get access to AO3 data in a Python script (specifically, some scripts for auto-tagging AO3 bookmarks on Pinboard), and so I threw together a Python module that acts as a pseudo-API. This is very rough code, written in a hurry, but it works and proves the concept. It’s probably not the easiest thing to install (sorry) but the README should give you some idea of what’s available.

Potentially of extra interest: this gives you a way to get a list of all fics where you’ve left kudos. (Albeit it very slowly, if you’ve read a lot of stuff.)

On GitHub: https://github.com/alexwlchan/ao3