Postman

Definition

Postman is a desktop and web app for working with HTTP APIs: build requests with auth, headers, and bodies, organise them into collections, generate documentation, and run lightweight tests. It is the standard tool for reverse-engineering and documenting third-party APIs before automating against them. Insomnia and Bruno are common open-source alternatives.

When to use

See also

• API — A formal contract that lets one software system call functions or fetch data from another, usually over HTTP.
• REST — An architectural style for HTTP APIs — resources at URLs, manipulated via standard methods like GET and POST.