Postman

Postman has become close to the default tool for anyone building or testing APIs. If you work with APIs daily, you have probably used it — and if you have not, your team almost certainly has.

What is Postman?

Postman is a platform for building, testing, documenting, and monitoring APIs, built around a graphical request builder. Instead of crafting requests with curl commands, you fill in a URL, pick a method, add headers and a body, and hit send. The response comes back formatted, with status, timing, and headers you can actually read. Collections group requests into folders you can run, share, and automate.

What turned a handy tool into a standard is the workflow around the request builder. You can save requests into collections, write automated tests that run against the responses, generate documentation from the same collection, spin up a mock server so the front-end team can work before the API exists, and monitor a live API on a schedule. One tool covers the whole loop from "does this endpoint work" to "is it still working in production".

Features that matter

The request builder supports REST, GraphQL, SOAP, WebSocket, and gRPC, so it covers most of the APIs you will meet in practice. The Collection Runner executes a whole folder of requests in order, with test scripts written in JavaScript that check status codes, response times, and body content. Mock servers return saved example responses, which lets other teams build against your API before it is ready. Shared workspaces let a team use the same collections and environments, with version history so a broken change can be traced.

Postman also ships an AI assistant that can help write tests and explain responses, a CLI for running collections in CI pipelines, and a VS Code extension for those who would rather stay in their editor. The newer MCP client support shows where the product is heading: Postman wants to be the place you work with APIs, not just test them.

Pricing

The free tier covers most individual developer needs: the full request builder, collections, and basic testing, for one user. Solo costs $9 a month when billed annually and adds more AI credits, webhooks, and private packages. Team costs $19 per user a month billed annually and adds shared workspaces, roles, and collaboration features. Enterprise is custom pricing with SSO, audit logs, and advanced security controls. Prices were checked on postman.com/pricing on 9 November 2026 — confirm the current terms there, because Postman changes its plans regularly.

Who should use it

Postman is the safe recommendation for developers and QA teams who touch APIs every day, and for teams that need shared documentation and testing in one place. If your team already uses it, switching costs are high and the network effect is real: your API partners and clients probably know it too.

It is less compelling if you only test one endpoint now and then. The desktop app is heavy for that job, and a lightweight client or even curl will do. The same applies if you want a fully open-source tool — Postman is a commercial product, and its free tier, while generous, is not open source.

Our verdict

Postman is the near-universal choice for API work, and the free tier means there is no reason not to start there. Paid plans are worth it once your team needs shared workspaces and collaboration; before that, the free tier does the job. The pricing scales fast with seats, so count heads before upgrading — but for most teams, Postman is the default for a reason.