Postman - The Collaboration Platform for API Development
Thunder Client - Rest API client for VS Code, lightweight Postman alternative
Insomnia REST - The most intuitive cross-platform REST API Client ð´
Assertible - Assertible software provides you with a simple and quick way to monitor your web services. It comes with automated QA tools that users can utilize to test and monitor their web services on different platforms and environments.
API Tester - API Tester is the first mobile app to test any type of API on the go. Including REST, GraphQL, WebSocket, SOAP, JSON RPC, XML, HTTP, HTTPS.
HTTPie for Terminal 2.6.0 - Developers all around the world rely on HTTPie for API testing.