I had to read a few comments on HN and Google your product to understand what it is. reading on your website told me (almost) nothing about your product. (I am more a desktop dev, very new to web).

From https://www.getpostman.com/

"A powerful GUI platform to make your API development faster & easier, from building API requests through testing, documentation and sharing"

Then searching, I found this:

https://seesparkbox.com/foundry/api_testing_with_postman

"...for interacting with HTTP APIs. It presents you with a friendly GUI for constructing requests and reading responses"

It's a bit sad I (an experienced dev) need to google outside your site to find out what your product does. Hope this helps.