This book is an effort to record the process and achievements that have been obtained by Perludem through the API Election program. The author, Harun Husein, summarizes and explains the experience obtained from the implementation of the program, so it can be beneficial for larger audiences. The book also discusses in depth principles and implementation of open data and API, based on the experience in implementing the API Elections. Hopefully, this will allow the reader to understand the idea and the practice of open data and API as technology that mutually supportive. In the end, the main implicit wisdom of this book is the idea that technology should be able to answer the problems of election, rather than presenting new problems.