The Society of Authors, based in the UK, has been serving the interests of professional writers for more than a century. Today it has more than 9,000 members and associates working as novelists, textbook writers, illustrators, ghost writers, translators, and more. Authors become eligible to join as soon as they are offered a contract.
One of the site's services is the Member Search, which allows visitors to search for writer or translator who is part of the Society. This service is also available programmatically as a SOAP-based API.