Postman

What it does

Postman lets you build, send, and save API requests, then organize them into collections you can share with a team. It handles authentication, environment variables, automated test scripts, and mock servers, so a developer can test an endpoint without waiting on a backend to finish. For non-developers, its value shows up when debugging a broken integration (a form that isn't sending leads to a CRM, a webhook that's silently failing) since Postman lets you fire the same request the app would and see the raw response.

Who this helps

You build, test, or document APIs.

You want to share API requests with your team.

You need mock servers so front-end work doesn't wait on the backend.

You want automated API tests.