While you can simply replicate your manual tests you've been doing in Swagger in Postman, you'd be missing out on the benefits of switching to Postman over Swagger. Postman allows you to automate your API endpoint tests, which can be done in a number of ways, each building off the last: You can construct validation tests in the Tests tab using simple code, such that every time you click the button to trigger the request, you can instantly see which tests pass and which fail. You would create a single entry for each positive/negative test you want to make, and then just click your way through them quickly to verify all your tests pass. You can group together multiple requests (like all the different positive and negative tests you want to cover) into a Collection, and then run the whole collection at a single click of a button, like a complete regression test.* You can use Pre-request Scripts and Variables to string together endpoints to build automated integration tests (passing data from one endpoint to the next), like how a user might experience their path through the application. ... *Just a heads-up about Postman: they recently changed their usage limits and currently you would have to pay for the most expensive plan to have unlimited Collection runs from within the UI, or else be restricted to a ridiculous degree. The way around this is to export your collections and run them in a console using Newman. Once you have Newman set up, it's pretty quick to do. Plus, Newman is what you would use to integrate your automated Postman tests into a CI/CD system eventually anyway. More on reddit.com

All of my automated API testing in done within my normal automated test suite - Postman is only used for ad-hoc testing and prototyping queries. I haven't tried to make Postman perform as an automated test tool, and I don't care to, because it makes more sense to maintain a single set of automated test scripts and there's no reason that can't easily include my API tests. More on reddit.com

Where I work, Postman is used for manual testing and Playwright for automation. If they are serious about automation, it's worth the time investment to use Playwright. More on reddit.com

I guess the alternative is to just write internal unit/integration tests without Postman. But I am finding that Postman scripts are pretty great for writing tests yet I am curious what your experiences are. Is using Postman too much of a liability for API testing infrastructure or is it actually ... More on reddit.com