James

James is an open‑source HTTP and HTTPS proxy that lets developers monitor and intercept web requests originating from a browser. It presents a graphical interface built with Electron and React, allowing users to view request details and apply custom mappings to URLs. The tool supports wildcard patterns in mapping rules, enabling flexible redirection of groups of resources based on path segments.

The application is intended for developers who need to inspect network traffic, debug API calls, or reroute requests during local testing. It provides a straightforward installation process for all major operating systems and includes command‑line utilities for testing, building, linting, and releasing the software. Contributions are welcomed through pull requests and issue tracking, and the project communicates via a Matrix room.

James is licensed under the MIT License and is currently in maintenance mode, with the original maintainers encouraging forks or migration to actively maintained alternatives. Its core dependencies are the hoxy proxy library, Electron for the desktop UI, and React for rendering.