Application programming interfaces provide a way to integrate multiple applications easily in order to produce expected useful information like technical news, weather news, sports events and market news. It is best to pack small modules in distributed APIs to generate more revenue than building a larger application for single company. Some of the popular APIs are Google Maps, Twitter, YouTube, Reddit API, News API and many more. It is well said that time and tide wait for none. Delay in providing useful information through APIs will lose customer interest and their next click would be on competitor's website. In order to sustain customers and to remain at the top, performance testing of APIs is vital. Keep exploring more on performance testing with our quarterly performance testing newsletters.