A fast, native desktop API client for the whole API lifecycle. Design OpenAPI specs visually, chain requests with the flow runner, test with assertions, run load tests, spin up mock servers, and automate via the atra CLI in CI/CD
Native desktop mock server that updates endpoints while running — no restart needed.
Key features:
→ Live endpoint editing on running servers
→ Visual state machine for multi-step API flows
→ WebSocket, SSE support (mock ChatGPT-style streaming)
→ API recording — capture real responses, auto-create mocks
→ Chaos engineering — inject latency, random failures
→ 100% localhost, no cloud, privacy-first
-> Performance: 166,000 req/sec
Built with Tauri (Rust). Fast, lightweight, free.
