Resonance

Resonance is a local-first, zero-account API client application designed to provide
an excellent user experience for testing and interacting with web services.

Features:
- Import collections from OpenAPI 3.0 specifications and Postman collections
- Environment management with variable templating
- Multiple authentication methods (Bearer, Basic, API keys, OAuth 2.0, Digest)
- Code generation in 9 languages
- GraphQL support with dedicated query editor
- gRPC support with server reflection
- Collection runner for batch request execution with variable chaining
- Built-in mock server for testing
- Workspace tabs for managing multiple concurrent requests
- Request history with search and replay
- Performance metrics with detailed timing breakdown
- HTTP proxy support
- Four theme options: light, dark, system-adaptive, and black (OLED)
- Available in English, German, Spanish, French, and Italian