The Mollom Python SDK by Mollom allows to monitor content to prevent spam by interacting with the API. Example usage demonstrates how to accept or reject content, depending how a user has submitted captcha.
Our API directory now includes 30 authentication APIs. The newest is the Yubikey API. The most popular, in terms of mashups, is the Google Client Authentication API. We list 6 Google Client Authentication mashups. Below you'll find some more stats from the directory, including the entire list of authentication APIs.