mitmproxy/mitmproxy

mitmproxy is an interactive TLS-capable intercepting HTTP proxy for penetration testers and software developers.

The tool addresses the need to inspect, modify, and debug HTTP traffic in real time. It works by intercepting encrypted TLS connections and presenting the traffic through an interactive interface, allowing users to examine requests and responses, modify them on the fly, and replay them. The project provides three interfaces: a console-based interactive mode, mitmdump for command-line usage similar to tcpdump for HTTP, and mitmweb for web-based access. It supports HTTP/1, HTTP/2, and WebSocket protocols.

The tool suits developers and security professionals who need to debug client-server interactions, test API behavior, or perform penetration testing. It is particularly valuable when you need to see exactly what traffic your application sends and receives, intercept and modify requests before they reach the server, or inspect encrypted HTTPS traffic. The interactive console interface makes it accessible for ad-hoc debugging sessions, while the command-line and web interfaces provide options for different workflows and automation scenarios.

The project maintains active engagement with its community through GitHub Discussions for user support. It welcomes contributions of all forms and provides clear documentation on the website along with precompiled binaries for installation. The codebase is written in Python and includes guidance for building from source through its contributing documentation.