Postman is an API Development Environment that helps people to build, test, document, monitor and publish documentation for their APIs.

The main features of Postman are

• Sending requests (with support for different authentication schemes, Cookies, certificates, headers, query parameters, request body and SOAP with/without WSDL) and debugging and saving responses.
• Organizing your APIs into groups called as Collections.
• Sharing and collaborating your Collections with your team.
• Writing tests. The test scripts can run pre-request, after a response has been received, and can have looping and branching concepts.
• The concept of variables to set and get. As well as globals environment variables.
• Test Automation using Collection Runs. The collections can also be exported and run in the command line using Newman as part of your build process.
• You can also schedule tests to be run in an automated fashion by using Postman Monitors.
• A way to auto-generate and customize your API documentation directly from your collections. It can be private, shared with your team, public and can also be set-up on your custom domain.
• Simulate a backend with Mock Servers.
• Integrations with services like Slack, Github, Bitbucket, Datadog, Keen.io, Microsoft Flow and several others.
• An API that lets you consume the data from Postman as part of your continuous integration and delivery processes.
• A way to import existing APIs from Swagger, RAML, cURL and several other tools.
• Auto-generation of code snippets in different languages from your APIs.
• Intercepting requests.
• Interactive History of all your requests.
• Access Control for your team and Single Sign On (SSO).
• Core open sourced components.

Getting Started

Postman is available as a native app for Mac, Windows, and Linux operating systems.

To install Postman, go to the apps page and click Download for Mac / Windows / Linux depending on your platform.

The native app is the recommended approach to using Postman as per the official documentation.