mitmproxy

Mitmproxy is an interactive HTTPS proxy designed for developers, testers, and system administrators who need to inspect, modify, and replay web traffic in real time. Running on Linux systems, the tool intercepts HTTP and HTTPS requests and responses, allowing users to examine headers, cookies, query parameters, and payload data as they pass between a client and a server. It provides both a terminal-based user interface for live inspection and a command-line utility for scripting traffic manipulation.

Operators can intercept traffic on the fly, set up automated interception filters, and alter requests or responses before they reach their destination. The software supports full TLS decryption and re-encryption for inspecting encrypted traffic streams without altering standard application behavior. Users can also replay previously captured flows to test server responses under repeatable conditions, making it suitable for debugging web applications and API integrations directly from the command line.