Scripting Engine • Author JavaScript scripts that intercept live HTTP and HTTPS traffic on-device. • Rewrite request headers, bodies, URIs, and methods, or change response status codes mid-flight. • Short-circuit any request with a synthetic response to simulate failures, stub backends, or test edge cases. • Scope each script with URL and method matchers so it only runs where you want it. • Chain multiple scripts in order, with each script's output feeding the next. • Dry-run any script against a real captured packet and inspect the full mutation diff and console logs before enabling it. • Generate ready-to-edit script templates straight from any packet in your capture history.

TunnelSight is your on-device network microscope, built for iOS and purpose-crafted for developers, network engineers, and security researchers who need real-time, packet-level visibility into every HTTP and HTTPS transaction. Install your unique per-device root CA once, start TunnelSight’s Local VPN tunnel, and instantly see every request, response, header, and body live, decoded, and ready for analysis. With the new on-device scripting engine, you can rewrite headers, mutate bodies, swap…