In the last few years, we have an exponential increase in the development and use of APIs. We are in the era of API-first companies like Stripe, Twilio, Mailgun etc. where the entire product or service is exposed via REST APIs. Web applications also today are powered by REST-based Web Services. APIs today encapsulate critical business logic with high SLAs. Hence it is important to test APIs as part of the continuous integration process to reduce errors, improve predictability and catch nasty bugs.