The best alternatives to curlx are Postman, curl.io, and Launch Menu. If these 3 options don't work for you, we've listed a few more alternatives below.
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Hurree— The smarter, simpler way to analyze your data
Postman is the world’s leading API platform, used by more than 30 million developers and 500,000 organizations worldwide for building and managing APIs.
Postman enables teams to efficiently collaborate at every stage of the API lifecycle while prioritizing quality, performance, and security.
Launch Menu is a productivity app that brings all your favorite applications, folders, and files right at your fingerprints (on a menu bar). Open up Launch Menu and configure it by quickly by organizing applications, files, folders, and much more into your own defined groups.