Proxygen

Proxygen is an HTTP proxy tool that runs on macOS, iPhone and iPad, allowing developers to intercept, inspect and modify HTTP traffic generated by their applications. It pairs a Mac with iOS devices over the local network, eliminating the need for manual Wi‑Fi proxy configuration or trusted certificates, and presents captured requests and responses in a searchable queue.

The tool supports deep inspection features such as real‑time editing of messages, diffing of text and binary payloads, and monitoring of WebSocket and Server‑Sent Events streams. It also offers test‑automation capabilities, including placeholder replacement, parallel worker threads, and JavaScript scripting for request transformation, as well as custom proxy listeners, upstream routing, and TLS options.

Designed for app developers, Proxygen bundles a native macOS and iOS interface with syntax highlighting, editor themes, dark mode, and a persistent data store. It is distributed under a one‑time purchase model with personal and team licenses, and requires macOS 13.0 or later.