The best alternatives to API Fortress are Postman, Paw, and API Tester. If these 3 options don't work for you, we've listed a few more alternatives below.
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Universal-2 by AssemblyAI— Speech-to-Text API for conversational 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.
Paw is a full-featured and beautifully designed Mac app that makes interaction with REST services delightful.Whether you are an API maker or consumer, Paw helps you build HTTP requests, inspect the server's response and even generate client code.
LoadFocus provides the cloud testing infrastructure you need for Load Testing and Page Speed Monitoring of your Website & APIs.
LoadFocus is an all-in-one cloud testing platform for websites and APIs with load testing, Apache JMeter load testing functionality and page speed monitoring!
Hoss helps teams make better API-driven products. Our simple drop-in solution makes it easy to track and manage third-party APIs. Get visibility into API performance, be alerted of errors before your customers notice, reduce time spent debugging and more.
GetWorks is a desktop-class HTTP client for iOS. Monitor, test, and manage APIs from anywhere with a GUI optimized for both iPad and iPhone. Postman API integration allows users to automatically download Postman collections to their devices.