Weer - A HTTP protocol debugger with Chrome DevTools frontend interface
Charles Proxy - HTTP proxy / HTTP monitor / Reverse Proxy
James - James is a HTTP Proxy and Monitor that enables developers to view and intercept requests made from...
HTTP Headers - HTTP Headers allows you to quickly see the HTTP header information for the current URL.
Proxyman.io - Proxyman is a high-performance macOS app, which enables developers to view HTTP/HTTPS requests from apps and domains.
Cellist - Cellist is an all-in-one HTTP debugging proxy software designed for OS that provides a straightforward approach to put a proxy between the HTTP client and the internet.