Swagger UI allows anyone — be it your development team or your end consumers — to visualize and interact with the API’s resources without having any of the implementation logic in place

Orderly Ape is an open source (MIT) tool to run distributed and scalable k6 load tests on your own infrastructure using k6, kubernetes, grafana and influxdb.

Checks web UI for browser compatibility (Compliance with Can I Use?)

API Testing Platform that automatically generates unit test cases with dependency mocks from API calls

Jest is a delightful JavaScript Testing Framework with a focus on simplicity.

RapidAPI for Mac is a full-featured HTTP client that lets you test and describe the APIs you build or consume. It has a beautiful native macOS interface to compose requests, inspect server responses, generate client code and export API definitions.