mitmproxy is an SSL-capable, intercepting HTTP proxy. It provides a console interface that allows traffic flows to be inspected and edited on the fly.

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

Both tools are fully documentented in the commandline --help flag, and, in the case of mitmproxy, a built-in help page accessible through the ? keyboard shortcut.

Capabilities

• Intercept HTTP requests and responses and modify them on the fly.
• Save complete HTTP conversations for later replay and analysis.
• Replay the client-side of an HTTP conversations.
• Replay HTTP responses of a previously recorded server.
• Make scripted changes to HTTP traffic using Python.
• SSL certificates for interception are generated on the fly.

Download

Releases and rendered documentation can be found on the mitmproxy website:

mitmproxy.org

Source is hosted on github:

github.com/cortesi/mitmproxy

Requirements

• Python 2.6.x or 2.7.x.
• openssl. Installed by default on most systems.
• urwid version 0.9.8 or newer.
• The test suite uses the pry unit testing library.
• Rendering the documentation requires countershape.

mitmproxy is tested and developed on OSX, Linux and OpenBSD.

You should also make sure that your console environment is set up with the following:

• EDITOR environment variable to determine the external editor.
• PAGER environment variable to determine the external pager.
• Appropriate entries in your mailcap files to determine external viewers for request and response contents.