Postman

Postman is the platform that became the standard way developers work with APIs. APIs are the connective tissue of modern software — the way applications talk to each other — and Postman provides a comprehensive environment for building, testing, documenting, and collaborating on them. What started as a simple tool for sending requests to an API and inspecting the responses has grown into a full API development platform used by millions of developers and a huge share of the world's software teams, becoming an indispensable part of how APIs get made and maintained.

At its core, Postman lets you construct and send requests to any API and examine exactly what comes back, which makes exploring, debugging, and understanding an API far easier than doing it through raw code. From there it expands into the whole API lifecycle: you can organise requests into collections, write automated tests that verify an API behaves correctly, manage different environments (development, staging, production), generate and host clear documentation, mock APIs before they're built, and monitor them over time. Crucially, Postman is built for collaboration — teams share collections and environments so everyone works from the same definitions, which keeps an organisation's understanding of its APIs consistent. It supports modern API standards and integrates into development workflows and CI pipelines.

Postman is used by backend and frontend developers, QA engineers, and increasingly anyone who needs to work with APIs, from solo developers to the largest enterprises. Its value is that it makes the often invisible, fiddly work of API development tangible, organised, and shareable. Instead of testing APIs with ad-hoc scripts and scattered notes, teams get a single, powerful home for their API work that improves quality and speeds up development. For virtually any project that builds or consumes APIs — which is to say, most modern software — Postman has become an essential tool, the place developers naturally turn whenever they need to understand, test, or document how their systems communicate.