Postman

The world's leading API platform: design, develop, test, and collaborate on APIs in one unified environment.

Postman is the API platform that streamlines the entire API lifecycle: design, development, testing, documentation, and monitoring. It provides a comprehensive API client for sending requests (GET, POST, etc.) and a powerful Collection Runner for automated functional and regression testing. The platform unifies workflows, allowing over 30 million developers and 98% of the Fortune 500 to collaborate effectively on APIs, ensuring faster time-to-market and consistent quality across all environments.

https://www.postman.com/