As you know, Yahoo Answers recently launched a new UI worldwide in 21 markets across Desktop & Mobile.
As part of this continued effort to improve Yahoo Answers for our users, we are focusing our energies and will no longer support the current set of Answers APIs (questionSearch, getByCategory, getQuestion, getByUser) as of June 3, 2014. In addition, the Yahoo Answers API documentation at the Yahoo Developer Network portal will also be removed.
We are working on an enhanced set of APIs and will post any future information in this space.
Questions related to this announcement can be directed to YDN General Discussion forum.