I need a sunrise/sunset webservice api

Anyone know of a good webservice or api that I can use to get the sunrise/sunset times in bulk? Every thing I have found so far only gives a day at a time or has a limitation on what dates can be used.

Is there a sunrise app?

The app also shows exactly how much daylight is left in the day - in a large, easy to read display - so you can plan ahead to the last ray of sunlight. Download it now. See the Sunrise, Sunset, First and Last light times for any day in the future.

http://sunrise-sunset.org/api

It's free to use. Just needs a credit link back to the website.