We've been planning to launch API in the end of August, but already now we get many letters with API request and in connection with the fact that Yahoo Site Explorer API is going to be shut down, we've decided to launch version 0.1, which may be used right now.
Current API version enables:
1.to see links on the indicated domain, directory or URL
2.to see info about pages on a domain or in a directory
More advanced options will come, as promised, in August. To read more about API 0.1, follow this link -
http://ahrefs.com/api/