Beginning today, ProPublica is launching a Campaign Finance API to help researchers, journalists and software developers cover election fundraising and expenditures. An API, or Application Programming Interface, is a language that two programs can use to communicate and trade data. Programmers can use it to access data from a website or Internet service more easily. We’re assuming responsibility of an API that was previously published by The New York Times. If you used the previous Campaign Finance API published by the New York Times, your code will continue to work for a short time, but you should migrate immediately. Keep reading for details on how.