n has become bloated and forces cloud synchronization, while high-performance tools like JMeter lack a modern developer experience.

Vayu bridges the gap. It is a desktop application that lets you debug APIs visually and then stress-test them instantly—without switching tools.

Key Features:
🚀 High Performance: Uses a native C++20 engine for maximum throughput.
🔒 Privacy First: 100% local. No cloud sync, no forced logins. Your data stays on your disk.
⚡ Sidecar Architecture: The UI (Electron) remains responsive even while the engine pumps thousands of requests per second.
📜 Scripting: Compatible with Postman's pm.test syntax using embedded QuickJS.
💻 Cross-Platform: Available for Windows, and Linux.

Vayu is Open Source (AGPL). I built it to bring the "developer experience" back to load testing.

I'd love to hear your feedback on the architecture and what features you'd like to see next!

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I built Vayu because I was frustrated with the current state of API tools. Postman has become bloated and forces cloud synchronization, while high-performance tools like JMeter lack a modern developer experience.

Vayu bridges the gap. It is a desktop application that lets you debug APIs visually and then stress-test them instantly—without switching tools.

Vayu

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