Hi. There is no API to create/submit stories to Digg at present
because it would need to be protected from spam and abuse.
You can get story IDs (also called item IDs) from API responses such
as searching and getting the current top news.
For example, if you get the URL http://services.digg.com/2.0/story.getTopNews
Command line example:
$ curl -q http://services.digg.com/2.0/story.getTopNews | grep
story_id | head -5
"story_id": "20120414083441:c988a98d-dfcf-4997-8647-9c2d0bcc254b",
"story_id": "20120413175053:d56f9d60-584d-405f-8403-f573076f1a7d",
"story_id": "20120414130313:570ff662-ee4e-4bb4-aa2a-0c3faa04c536",
"story_id": "20120414132557:15ecf342-b817-460b-b285-53fcb2392b37",
"story_id": "20120414130618:a0bc95c3-4167-458e-9908-34afc2427ab6",
Docs: http://developers.digg.com/story-gettopnews
Dave