PactumJS

PactumJS is a REST API testing tool for JavaScript, used to automate end-to-end, integration, contract and component (service level) tests.

Tests are written with a fluent API that sends requests and checks status codes, headers, JSON bodies and schemas. A built-in mock server simulates dependencies for component testing, data templates and stores help manage test data, and contract testing is supported. PactumJS is installed as a development dependency and runs with a test runner such as Mocha, Jest or Cucumber. It can be extended and customised with handlers.

PactumJS is free and open source under the MIT licence.