marmelab/FakeRest

mocker-api that creates mocks for REST APIs. It will be helpful when you try to test your application without the actual REST API server.

The jQuery Mockjax Plugin provides a simple and extremely flexible interface for mocking or simulating ajax requests and responses

Data querying library for testing JavaScript applications.

The industry standard for API mocking in JavaScript.

Mock http requests made using fetch

REST API Testing Tool for all levels in a Test Pyramid

Powerful friendly HTTP mock server & proxy library

Smocker is a simple and efficient HTTP mock server and proxy

LiveMock is a comprehensive tool for API development and testing, offering mock data, request proxying, and logging, to streamline workflows and track traffic.