Postman is an app for web developers that makes it possible to send API queries to a website to test or automate services. It’s nice because it has import/export in standard formats (such as Swagger and OpenAPI) and lets you save your API schema locally.
In the past few years, however, it’s become clear that Postman is on track for enshittification and I’m looking for FOSS alternatives.
The weird thing in this app category is that there seem to be a LOT of budding apps, but it’s rare to get one that takes it across the finishing line–a polished GUI app like Postman.
Love that term - first coined by a favourite writer of mine: Cory Doctorow…
There’s a serious (and legitmate) fear that the new owners of Bandcamp are going to enshittify the platform - it’s vital for emerging artists - and my favourite source of music (they offer lossless format on everything!) - but some pretty big name artists and labels, use it for music distribution, digital download, CD and vinyl, and merch (stickers and apparel etc)…
I don’t think you’ll find an exact clone of Postman (and I don’t think that would be a good idea either, let’s not be cheap-ass copycats).
There are a few nice alternatives listed already that I’ll also gladly look into.
A lot will depend on what features from postman you’re looking for. As for the aspect of testing/fuzzing… I’ve used OWASP ZAP quite regularly for request spoofing and tampering. Might also be of use for you.
And then there’s Selenium, but that’s more of a programming library. I use it in Python, but it actually also exists as a browser plugin that allows you to ‘record macros’ (and then tweak them)
though quite self-explanatory, I thought you had made this up.