APISpider is described as 'Lightweight API client for testing, debugging, and documenting REST APIs.
It includes request history, collections, environment variables, mock servers, and API docs — all designed to keep your workflow fast and distraction-free' and is a API Client in the development category. There are more than 10 alternatives to APISpider for a variety of platforms, including Mac, Windows, Linux, Web-based and Flathub apps. The best APISpider alternative is Bruno, which is both free and Open Source. Other great apps like APISpider are Postman, Insomnia REST Client, Yaak and Hoppscotch.