You may soon be able to "Digg This" from within your applications. The social news site's API (our Digg API profile) has long been able to list stories and other data. Now it's looking to let developers add content programmatically.
This week, 500px cryptically announced the 500px API would no longer be available for free. The announcement hints that the API will continue to be available for a price, but no pricing tiers or models have been published. The announcement was made via Hacker News and developers are speculating.