A short while back I wrote a broker for Weblate. I didn't want to submit it before the Bitbucket hook was actually available on Weblate too. But it is now!
If you need to make any changes to it, I'd appreciate it if you submit pull requests I can pull in. Also, feel free to point people to the project/repository for an example of a broker that's out in the open.
– Namasté, Frederik "Freso" S. Olesen http://freso.dk/