DeuSu is short for "Deutsche Suchmaschine" which is German for... well... "German Search-Engine". Not very imaginative, but the name is short and the domains were available. :)

DeuSu.org API

The DeuSu API can be used freely.

I just ask that you at least try to minimize the impact it has on my servers. Which means that if possibly, try to spread your queries over time. Of course I know that if you run your own search-frontend, then this may not be possible. Just try if you can.

Documentation for the API