Open Knesset is an open source project developed by a community of volunteers and born out of the Public Knowledge Workshop, a non-profit Israeli organization aiming to make government information easily accessible to the public. Open Knesset mines data from the Knesset website and presents it in user-friendly, browser agnostic formats.
The Open Knesset User Voting API provides developer access to Members of Knesset (MKs) voting data, as well as allowing applications to post user votes in support or opposition to approved, ongoing, or dismissed bills. Individual and aggregate user voting data may then be contrasted with MK voting data. Among the supported queries is a call calculating the correlation between the voting of each MK and that of a specified user.