Mitmproxy is an SSL-capable man-in-the-middle HTTP proxy. It provides a console interface that allows traffic flows to be inspected and edited on the fly.

Also shipped is mitmdump, the command-line version of mitmproxy, with the same functionality but without the frills. Think tcpdump for HTTP.

Features: - intercept and modify HTTP traffic on the fly - save HTTP conversations for later replay and analysis - replay both HTTP clients and servers - make scripted changes to HTTP traffic using Python - SSL interception certs generated on the fly