Resonance v3.6.2

Resonance is a local-first, zero-account API client application designed to provide an excellent user experience for testing and interacting with web services. It offers a modern and intuitive interface for developers with powerful features for API development and testing.

Key Features:

• REST/HTTP (HTTP/1.1 and HTTP/2) with all body modes, detailed timing breakdown and cookie display
• GraphQL with query and variables editors, schema introspection, an interactive query explorer and subscriptions over WebSocket
• gRPC with server reflection, local .proto files, all four RPC kinds and TLS/mTLS
• WebSocket, Server-Sent Events and MQTT connections with live status
• Import from OpenAPI 3.x, Swagger 2.0, Postman, Insomnia, HAR captures and cURL commands; export to OpenAPI
• Code generation in 9 languages and Markdown/HTML documentation generation
• Built-in mock server with response templating, custom bodies, status codes and delays
• Pre-request and test scripts in sandboxed JavaScript with a Postman-compatible pm API
• Collection runner with data files, request tags, run history and JSON/JUnit XML reports
• Response schema validation (JSON Schema drafts 4 to 2020-12) and JSONPath/XPath inspection
• Environments with variable templating and dynamic variables
• Bearer, Basic, API key, OAuth 2.0 with automatic refresh, Digest, NTLM and AWS Signature v4 authentication
• Client certificates (mTLS), keychain-backed secrets and HTTP/HTTPS/SOCKS proxy support
• Git-friendly collections stored as plain files, with the current branch shown in the sidebar
• Workspace tabs, request history with search and replay, and keyboard shortcuts for everything
• Light, dark and system themes with 9 accent colours
• Available in English, German, Spanish, French, Italian and Portuguese (BR)