Try HawkClient: https://www.hawkclient.com

Free Offline Alternative to Postman.

1. Works Offline: HawkClient stores requests in human-readable YAML files, making it ideal for Git collaboration

2. Team Collaboration: Easily share and manage files with your team using Git.

3. Privacy First: No sign-ins. No user data collection.

4. Cross-Platform: Available for macOS, Linux, and Windows.

5. Support API Flows: HawkClient also supports creating and managing API workflows for streamlined API testing through simple drag and drop ui.

6. Test/validations through script and UI both.

7. Mock Server : HawkClient also support mock server(to create mock APIs)

8. Support Postman Collection Import