<b>API Integration in Web Application</b> Application Program Interface API widely used for the programmers. It helps programmers to focus on their programming rather than the other features. API provides the facility to programmer for use the “Predefined Code”. Among them one type of API provides by the google that is chart API. Chart API is used to generate the chart from the data which are available on our database. Sometimes it would be very hard to develop such type of another system. Rather than we can use API and save the time and effort that can be use at proper place. This paper will describe how we can integrate the google chart API in the php website. API, PHP, Mysql, JSON, Payroll, Interface Issue-2 Volume-1 Dr. Chetan R. Dudhagara | Mr. Ashish Joshi