Postman is a powerful HTTP client for testing web services. Created by Abhinav Asthana, Postman makes it easy to test, develop and document APIs by allowing users to quickly put together both simple and complex HTTP requests.
Postman is available as both a Google Chrome Packaged App and a Google Chrome in-browser app. The packaged app version includes advanced features such as OAuth 2.0 support and bulk uploading/importing that are not available in the in-browser version. The in-browser version includes a few features, such as session cookies support, that are not yet available in the packaged app version. At publication time, the Postman REST Client is one of the highest-rated productivity apps in the Chrome Web Store, with more than 348,000 unique users (for both versions), and more than 63,000 collections shared via Postman (more on that later). This post is an in-depth review of the Postman Google Chrome Packaged App highlighting the key features that make Postman a must-have tool for API developers and consumers at all levels of experience.