API TESTING
WITHOUT THE BLOAT.
A native macOS API client with deep network insights.
Lightweight, fast, and privacy-focused.
SEE WHAT OTHER TOOLS HIDE
Many existing tools abstract away critical network details.Kajo is native, instant, and provides deep visibility into your HTTP requests—from DNS resolution to TLS handshakes.
FEATURES
Deep Diagnostics
Detailed timing breakdowns: DNS lookup, TCP connection, TLS handshake, TTFB, and download duration.
TLS Inspection
Verify security with visibility into protocol versions, cipher suites, and full certificate chains.
Native Speed
Built with Swift and SwiftUI. No Electron, no lag. Launches instantly and feels at home on macOS.
Privacy First
Your data stays local. No forced cloud sync, no tracking, no external dependencies.
Smart Responses
Automatic syntax highlighting for JSON, HTML, and more. Pretty-printing and response size tracking.
SwiftData History
Persistent, searchable request history and organized collections grouped by API and Endpoint.
Why Kajo?
| Feature | Kajo | Electron Giants |
|---|---|---|
| Native macOS | ✅ Yes | ❌ No (Electron) |
| App Size | Lightweight | 200MB+ |
| Timing Breakdown | ✅ Built-in | ⚠️ Limited |
| TLS Cipher Info | ✅ Yes | ❌ No |
| Privacy | local-first | Cloud-centric |