The app store said this app is compatible, but when I open it I get a message "You can’t use this version of the application “RestClient.app” with this version of macOS." And as the title suggests, the support website is a parked domain, so yay.

When reviewing this app, the App Store Compatibility checker listed "Works On this MacBook Air" with 10.14.5. But when I try to open the App, I get an error that it "Does not work with this version of MacOS. Waste of $4

Just wasted $4, it will not even open on Mojave

Looks like it hasn’t been updated since 2013, and it doesnt work with High Sierra.

Good tool, needed a decent OS X REST client in a pinch and this is doing a great job so far.

I like this application a lot. My biggest frustration is that I cannot have multiple windows or tabs open at the same time. I need this frequently so I can take the results of one request and copy them into another request as parameters. Other than that it's great.

Try switching around menus after a request has completed and the application will hang for no apparent reason and takes a few //minutes// for it to gain functionality.

There has been an update since my initial review, and performance is now superb. All in all, I think this is the best of several HTTP clients on the App Store. It's easy to use in every respect, and I love that it allows you to save requests within the interface (I guess there off in a plist or something) rather than saving them as standalone files (that you're sure to lose track of). Another plus -- for me, at least -- is that authentication and other headers are saved as part of the request so that you don't have to re-enter them. This app saves me tons of time in testing RESTful services.